JPS5826648A - Vehicle abnormality display device - Google Patents

Abstract

PURPOSE:To changeably display the defective content on one display pannel by providing a multiple controller with the features of locating defects in its own control and placing them under centralized control for display of the defect content. CONSTITUTION:A multiple controller 6 receives sensor signals of respective detectors 2a through 2k, switch signals 1a through 1c and diagnosis data or operating data of a mounted control group 4 so as to make a micro-computer 6 an arithmetically process the signals and have the results stored in a non-volatile RAM 6c. The controller 6 selects data to be displayed and controls a display 7 to get it displayed. The function of control comprises selection of data based on a display entry selective routine in the priority order, setting of an instructive command for the display 7 in a display instruction register and combination display of the entry code which identifies the diagnosis defect content. The driver may be informed of the defect content and is given the information source for trouble-shooting.

Description

[Detailed description of the invention] The present invention relates to an abnormality display device for a vehicle that displays an abnormality.

In conventional vehicles, there is a device called an OK monitor that detects and displays warnings such as insufficient oil level, insufficient window washer fluid, head lamp disconnection, tail lamp disconnection, stop lamp disconnection, and abnormality in the charging system. These inspection items were chosen to be relatively easy to inspect and repair even for ordinary drivers, and the warning device was originally intended for ordinary drivers.

On the other hand, the latest vehicles have become increasingly complex and have become increasingly complex, making it difficult to locate faults. For example, control devices using microcomputers, such as fuel injection control devices, point control devices, air control devices, etc.
One or more of an air conditioner control device, an automatic driving speed control device, etc. are mounted on one vehicle, and each of these control devices has iI number of sensors and actuators built into each control device. The microcomputer's characteristics are utilized to precisely control the device according to the control program stored in the storage section.

However, if an abnormality occurs somewhere in such a control device, the 7 functions provided in each control device will be activated, allowing the driver to clearly identify the abnormality in the control device.
There are cases where it is not possible to do so.

The present invention has been made in view of the above-mentioned problems, and includes a plurality of control devices that perform control independently according to a predetermined control program, and is provided with a function of detecting a control abnormality in the control device itself and generating an abnormality signal. The central control device centrally manages the generation of abnormal signals from the control devices of the vehicle, and displays the details of the abnormality on the display device in response to the generation of the abnormal signals. It is an object of the present invention to provide a vehicle abnormality display device that allows a driver of a vehicle to recognize the details of an abnormality in a specific control device through a centrally managed display.

The present invention will be described below with reference to embodiments shown in the drawings.

The first wJ is the overall structure ift,'gJ, which shows one example thereof.

In FIG. 1, 1 is a switch group, and 1m is a command to the central control device 6 to selectively display the first diagnosis information, giving priority to other displays. The first diagnosis switch lb is a second dialog that issues a command to the central control device 6 to selectively display the third diagnosis information with priority over other displays as the content to be displayed on the display device. This is a gnosis switch.The contents of the first and second diagnosis information will be described later, but the second diagnosis switch is a hidden switch in a normal vehicle, and is a dry-X.

□Usually, for repairs and inspections, the product is transported to a place such as a dealer that has the necessary services and equipment for repair and inspection. It is used only occasionally. 10 is a 4-position F switch (F switch), and a central control device 6
This command issues a command to initialize the diagnosis information stored in the non-volatile memory M6o, which is the main component of the central management device 6. 2 is the detector group, coolant level warning switch 2&, window washer liquid level warning switch 211, headlamp disconnection detection circuit 8C1, rear lamp disconnection detection circuit 2 modified, stop lamp disconnection detection circuit 2, steering unlock switch 2t1 door open switch 2gs ignition close switch, 1! λ, lighting switch 2i, battery voltage divider circuit Z j s vehicle interior temperature sensor (thermistor, etc.) J! It is installed in each part of the vehicle such as χ, monitors the status of the installed part, converts the status into analog or digital electrical signals according to changes in the status, and provides that information to the central control device 6. It is something to do.

Number is a group of in-vehicle control devices, including a comprehensive engine control device 4m, a vehicle speed control device (including a multi-unit alarm control device) 4'b, an anti-slip control device 4G, and an air conditioner control device 4d. These control devices are connected to actuator groups and detector groups (not shown) necessary for accomplishing the purpose of each control device, collect various information from these detector groups, and transmit that information to the control device. A microcomputer (not shown), which is the main component of the controller, performs arithmetic processing and controls the actuator group based on the results. Moreover, each control device 4a, 4b
, 4a, 44 are each control device 4 & generated in the process of control.
, 41) It holds diagnosis information and operating status information for each S46, 4fl, and at an appropriate timing controls data communication s5 between the central management device 6 and each control device 41.4bS40, 4(l). The information is serially transmitted to the central management device 6 according to a fixed communication procedure.

For example, the engine integrated control system [i is a water temperature sensor (thermistor) (not shown), an intake air temperature sensor (thermistor), an intake air amount sensor + (potency meter), a battery voltage, an acceleration sensor, an oxygen sensor, an engine crank angle sensor, a vehicle speed sensor, A group of detectors that detect the operating state of the engine, such as an idle switch, full throttle switch, air conditioner operating switch, starter operating switch, and neutral switch, are connected, and information from these detector groups is input and controlled. A computer (not shown), which is the main component of the device, processes this information and optimizes the fuel supply to the engine for purposes such as purifying exhaust gas, improving drivability, improving fuel efficiency, and increasing output. Therefore, the conduction time and the timing of the start of conduction of the drive coil of the injector, which is an actuator (not shown) that injects fuel into the intake system of the engine (not shown), are controlled, and for the same purpose, the ignition timing of the ignition device (not shown) is controlled. In order to control the ignition ability of the ignition device above a certain level over the entire rotation range, information from various sensors is processed and, based on the results, the conduction start timing and conduction cutoff of the ignition coil (not shown) in the ignition device are determined. control the timing. Further, in order to stabilize the engine speed at a constant value when the engine is idling, opening and closing of the intake valve is controlled by a step motor (not shown), which is an actuator for feedback controlling the intake air amount according to the engine speed. In addition, this is done by duty-controlling the conduction time of the drive coil of the negative pressure switching pulp (not shown), mixing the engine's intake negative pressure and atmospheric pressure at a duty ratio, creating an appropriate voltage, and using the created negative pressure to control the intake. The amount of intake air may be adjusted by an air switching pulp (not shown) that controls the amount of air.

In the process of control, this engine comprehensive control device diagnoses the operating states of various detectors and actuators connected to the engine control device, as well as the operating state of the control device's own circuits, and determines whether they are normal or abnormal. data is retained. Also, based on the information from the detector, data on the operating state such as engine rotation speed is held, and data is transmitted serially to the central control device 6 at an appropriate timing via the data communication 116 according to a predetermined communication procedure. Send those data.

1 is a group of data communication lines connecting the central control device 6 and other vehicle-mounted control devices. 6 is a central control unit, OPU, R
1-chip microcomputer 6m consisting of OM, RAM, I10 circuit, etc., converter 611.
and 0MO8 non-volatile RAM6C as main components,
Control command information is input from the input port of the microphone 4 computer 6a to the central control device 6 of the switch group 1, and information on the status of each part of the vehicle in which the detector is installed is input from the detector group 2. The other control device groups 4 receive serial data communication, and the micro combiator 6& processes that information to create various display information.
It also selects data to be displayed from among various stored display information and controls the display device to display them. The required display information stored in RAM is non-volatile RAM that retains its memory even when the power is turned off.
It will be stored in 6C.

The storage contents of this non-volatile RAM 6a are as shown in Table 1, and the A area of this non-volatile RAM go mainly contains diagnostic abnormality information sent from each control device 41.4bS4 (1S4) and central management. Diagnosis abnormality information of the device 6 itself is stored, and area B stores OK monitor information, switch information, operation information of each control device 4a, 4b, number., 4d, battery voltage, room temperature, etc., and information on the arithmetic processing process. The generated tempo data is stored.

Note that the contents stored in area B may be erased by turning off the ignition switch.

In addition, the M/D converter 6b inputs the analog voltage generated from the battery voltage divider circuit 25s and the room temperature detection circuit (using a thermostat) 2k in the detector group 2, and converts it into A.
/D conversion and provides the converted digital information to the micro combinator 6& in response to a request from the microcomputer 6a.

F is a display device, which displays characters and numbers corresponding to display commands from the central control device 6, and a lamp (warning light).
7N+ display, such as cathode ray tube display, electro-luminescent display (IL), liquid crystal display (
LC), gas discharge tube display (Go), fluorescent tube display, light emitting diode display (LMD)
) etc. can be used. Also, LIeD as a lamp
, a white light bulb, a gas discharge tube, etc. can be used. A buzzer 8 is turned on or off in response to a buzzer electromotive signal from the central control device 6 (the output stage of the central control device 6 is equipped with a buzzer driving transistor) to issue a warning to the driver.

Reference numeral 9 denotes a power supply section of the central control device 6, which receives DC power from the battery 10 and generates a constant voltage.

Reference numerals 9a and Ib are constant voltage circuits of the central control device 6, which generate a constant voltage (both constant voltages of 5V) from the battery 10 mounted on the vehicle and supply it to the central control device 6. The first constant voltage circuit 9& is directly connected to the battery 10, and always supplies a constant voltage to the nonvolatile RAM 6C in the central control device 6, keeping the nonvolatile RAM 60 energized at all times, even when the ignition switch 9C is turned off. retain memory. Further, when the ignition switch 9C is turned on, the second constant voltage circuit 9b is supplied with power from the battery 10 via the ignition switch 96 and the diode 9f, and a constant voltage is applied to the other parts of the central tube embedded W6 except for the non-volatile RAM 60. supply. Also, even if the ignition switch 9C is off, the door switch 9 (1 (switch turns on when the driver's door opens))
When turns on, P11? ) The transistor 9 becomes conductive, and the second constant voltage circuit 9b becomes PIP from the battery 0)
It is activated by supplying power through the transistor 9 and the diode 9g.

Next, the operation in the above configuration is illustrated in the display explanatory diagram shown in FIG. 2, the operation flow chart in FIGS.
The timing chart shown in Figure 4, and the timing chart shown in Figure 11.
Serial data in Figure 5 ^ This will be explained along with the configuration diagram.

Now, in a vehicle equipped with components 1 to 10 in FIG.
When the key switch 9C is turned on at the start of operation, or when the driver's door is opened even if the key switch 90 is off, a constant voltage is supplied from battery 0 through the second constant voltage circuit 9b, and each part of the electrical system is It becomes operational. And in the micro combinator 6 & the second constant voltage circuit 9
It receives a stabilizing voltage from b and enters the operating state, and several l
Arithmetic processing of the control program is executed at a period of approximately OOtns·O.

10. The arithmetic processing is started at the start step 100 in FIG. Set to initial state.

This initial state setting operation includes resetting monitor flags for each OK monitor item, initializing the serial data reception routine, and controlling each control device 41L14bS4C, 4(
This includes work such as initializing the operating data of 1. However, at this time, each control device 4m, 4b,
Only the diagnosis information 4a and 4d is not affected by this initial setting operation.

In addition, the check code data in the check code area in the nonvolatile RAM 60 (if the constant voltage power has been continuously supplied to the nonvolatile RAM 60 since the last time the ignition switch 90 was turned on, the check code data in the check code area in the nonvolatile RAM 60 is This method simultaneously checks the data representing the validity of the non-volatile RAM M60 written in the non-volatile RAM M60 and other data in the non-volatile RAM M60, and if the reference result differs from the expected value, the non-volatile RAM M8 (The ignition switch 9e is turned on for the first time after the constant voltage power is supplied to the central control device 6, and it is determined that the constant voltage power is supplied to the entire central control device
All data in 60 is determined to be invalid and initialized.

After this initial setting, the process advances to an information search (switch group, detector group) routine 300. In this information search routine 300, the 11th and 2nd diagnosis switch flags and the engineering 8 switch flag are set/set in response to the on/off states of the first and second diagnosis switches la, lb, and the engineering 8 switch 1o. Reset. Also, the cooling water level warning switch in detector group 2! a. Detect the on/off state of the window washer fluid level warning switch 2b to determine whether or not there is a shortage of cooling water and window washer fluid, and reset the flags for insufficient cooling water and window washer fluid. /set. Also, head lamp disconnection detection circuit 26, rear lamp disconnection detection circuit J! , d. Detects the stop lamp, determines whether the head lamp, rear lamp, or stop lamp is disconnected, IL/continuous, and sets/resets each lamp disconnection flag. Also, by detecting the on/off state of the ignition close switch 2h, the lighting switch 21, and the on/off state of the door open switch 2g, the ignition close switch 2h is +7 (open), the lighting switch 21 is on, and the door open switch 2g is turned on. It is determined that the three states of on (open) have been established, and a flag for "forgot to turn on the light" is set for a certain period of time after the conditions are met. Also, the ignition close switch 2, the steering unlock switch 2f, and the door open switch 2.
g on/off status is detected, the ignition close switch 2h is turned off, and the steering unlock switch 2 is turned off.
Determine whether f is on (key inserted) and door open switch 2g is on, and after these conditions are met, set 7 lags for "I forgot to remove imy" for a certain period of time. . In addition, a dispersion voltage divider circuit ff1j,
Based on the output voltage of the room temperature detection circuit 2 and the digital signal sent through the A/yy converter 6b, data on the battery voltage and room temperature are obtained and stored in the RAM. After performing the above arithmetic processing, the process proceeds to the communication information processing routine 400.

This communication information processing routine 400 decodes the data received from each control device group 4 in the timer interrupt routine shown in FIG.
Diagnosis information and operation state information are obtained, and data processing for operation display and diagnosis display of each control device 4&, 4b, 4o, and 46 is performed based on the information.

(The detailed arithmetic processing is shown in FIG. 6.) The received data used in this communication information processing routine 40'O will be explained below. While the series of routines shown in Fig. 3 are currently being executed, the timer interrupt routine shown in Fig. 4 is executed with priority over other routines due to a timer interrupt that occurs at a predetermined cycle of l ell m 0. When the serial data reception routine 800 is reached, each control device 4a receives data from the control device group 4 via the data communication line group 5 according to a predetermined communication procedure.

The data of diagnosis information and operation information of 4b, 4a, and 4(l) are sampled at appropriate timings synchronized with timer interrupts, and after performing arithmetic processing to confirm the validity of the data such as parity error check, it becomes valid. When it is determined that the data is correct, the data is stored in the nonvolatile 81M60 for each communication line, and at the same time, the unprocessed data flag for that communication line is set.The structure of this serial data is shown in Fig. 11.Next The operation of this serial data reception routine 800 will now be explained with reference to the serial data reception timing chart shown in FIG. 1B. In this FIG.
4 and (6) indicate serial data on two data communication lines (hereinafter referred to as the eleventh and second data communication lines) of the data communication line group 6. (3) and (7) indicate data sampling timings of the first and second data communication lines.

(4) and (8) are the first. The timing of resetting/setting the data receiving flag indicating that serial data on the second data communication line is being received is shown. (5)
, (9) indicates that there is unprocessed data corresponding to the first and second data communication lines, indicating that the data received from each communication line has not yet been processed by the communication information processing routine 400 in the main routine. Indicates when to set Buddha. The transmission speed of this serial data is 25
At 0 bit/second, as shown in Figure 11, the start bit (S) is low level and 1 bit (bit) data is 8 bits with positive logic), and P is 1 bit with even parity. The stop bit (8111) is 1 pitch at high level. It is at a high level when there is no data.

Next, the operation of this serial data reception routine 800 will be explained according to the timing chart of FIG. 12 and the detailed calculation process of FIG. S. The arithmetic processing shown in FIG. 5 is for one piece of serially received data, and similar arithmetic processing is sequentially executed for other serially received data.

The data of the 11th and 2nd data communication lines in the timing chart shown earlier (12th v4 (J!ri, (6)
) is the data sampling timing (Figure 12 (3)) in synchronization with the timer interrupt generation timing (Figure 12 (1)).
, sampled at (zu). 3948801m, 8
01b is the star F bit detection period, during which the data communication line continues to have no data after one data communication is completed, and every time a timer interrupt occurs (ljF
Data on each data communication line is sampled for each data communication line (Iseo). This period is a period in which the data communication line is at a high level after the previous data communication is completed, and the timing at which it changes to a low level for the first time is being found. Subsequently, periods 801m and 802b are the second time (2jF!se) after a change in the level of each data communication line from high to low is detected during the start bit confirmation period.
The data on each data communication line is sampled in synchronization with the timer interrupt timing (after e), and if it is low level at this time as well, it is determined that there is a true start bit (B?). Further, if the sampled value is a high level, it is determined that the previously sampled low level was noise, and the state returns to 802m and 802b again. Then, in serial data reception periods 803a and 803b following periods 802m and 802b, data on the first and second data communication lines is collected at each timer interrupt generation timing of the fourth time (41Nsea) after the previous data sampling. is sampled by the number of bits of communication data (8 data bits + 1 parity bit + 1 stop bit = 10 bits).

After checking the relationship between the 8 bits of data and the parity bit in the 10-bit data obtained in this way (parity check) and the level (high level) of the stop bit, if it is determined that reception has been completed normally, Set the data (8 bits) at RAM timing. Note that the data receiving flag is set as shown in Fig. 12 (4) and (8) from the time when the start bit is confirmed to the first tie after the stop bit is sampled. It is set until an interrupt occurs, and data is tied unconditionally during this time! The data is sampled every fourth interrupt and is handled as communication data.

Based on the above-mentioned received data and the unprocessed data flag, the communication information processing routine 400 first enters step 401 of determining the unprocessed data flag shown in FIG. Here, the 7-bit/reset state of the unprocessed data presence flag for each communication line is determined, and if the unprocessed data presence flag is set and the determination becomes YlB, the next diagnosis information and operation information are determined. The process advances to determination step 402.

In this judgment step 402, information for each communication line or for the same communication line is classified into diagnosis and operation status information according to predetermined classifications depending on the data format, and if it is diagnosis information, the diagnosis information is decoded and The process advances to a storage routine 403, and if it is operational information, the process proceeds to an operational information decoding and storage routine 40. Then, when proceeding to routine 40'F, the received data is decoded and stored as information such as engine speed, auto drive operating state, speed winner operating state a, etc., in RALIL, and then the next step is performed. Proceed to number 08. Furthermore, when proceeding to routine 403, the received data is decoded as diagnosis abnormality information, classified by each control device and by item, and stored in the diagnosis information storage area in the nonvolatile RAM 60 as shown in Tables 2 and 3. (Table 2
, Table 3 shows the 1st and 2nd groups of diagnosis abnormalities, and the 1st group is Addressem]) RX to MuDλX+n, ff
Group i is from address kDR to ADR*-) n) for each diagnosis abnormality item of each control device.
The corresponding diagnosis abnormality flags in the diagnostic abnormality flag group (110 section in the table) in groups 1 and 2 are set (the 110 section is set to 1). Then, the corresponding diagnosis counters are set to 0. This diagnosis counter is the 4th v! In the diagnostic error elapsed time accumulation routine 1000 in the timer interrupt routine of J, the diagnosis error flag is set at a fixed period (1 second for group 1, 1 hour for group 2) synchronized with the timer interrupt. The content of the diagnosis counter, which is set to 1, is read into the microphone four computer 6&, incremented by one in the microphone four computer 6&, and the value is written again to the counter at the address where it was previously stored. That is, the counter of the first group or the second group whose diagnosis abnormality flag is set to 1 is incremented by 1 every second for the first group and every hour for the second group. Therefore, these two types of diagnosis counters measure the elapsed time since the corresponding diagnosis abnormality item was last received, one in 1-second intervals, and one in 1-second intervals.
One is shown in units of one hour. In addition, (υ, (2), (3), (4>) in Tables 2 and 3 are, for example, the item Am of engine XCυ, the item A2 of engine 10υ,
Item A1 of air conditioner 1cCυ, auto drive tobi ay
are associated with the items of Aj, respectively.

Table 2 Table 3 When this routine 403 is completed, the process proceeds to an importance classification routine 404. In this routine 404, the diagnosis received data processed in the routine 403 is classified into two stages A/B according to the predetermined importance level for each diagnosis abnormality item, and the next A/B is classified.
/B The process advances to judgment step 405, and if it is classified as M, the process advances to Frabum set routine 406. Then, in this routine 406, Buddha t is set and the process proceeds to routine 408. Moreover, the above-mentioned M/'B determination step 40! If it is classified as 1 in I, the process directly advances to routine 408. This unprocessed data presence flag reset routine 408 is performed by the routine 40.
This is a routine for resetting the unprocessed data flag corresponding to the received data processed in step 3.40). This routine 4
After passing through 08, the process proceeds to step 409 for determining the elapsed time after diagnosis reception. Further, if the determination in the first unprocessed data presence flag determination step 401 is NO, the process directly advances to this determination step 409 .

In this judgment step 409, the elapsed time for each item of the first group of diagnosis abnormalities in Table 2 is judged based on the value of the timer counter that is accumulated in the routine 1000 of FIG. Tl (for example 1
5 seconds), flag reset routine 41
0, and if the elapsed time is within 〒1, continue to the 38th
! Proceed to routine 400 & of I. Then, if the process proceeds to flag reset routine 410, determination step 40G
All diagnosis abnormality flags in one group determined to have passed T1 or more are reset. Then, in the next determination step 411, it is determined whether or not all the diagnosis abnormality flags of classification A in one group have been reset. The people are reset, and if even one person is still in the Sera F state, the process directly advances to the next determination step 413. In this determination step 413, the elapsed time after diagnosis reception corresponding to the flag set in the second group is determined based on the value of the timer counter accumulated in routine 10oO of FIG.
If more than 20 hours have elapsed (for example, 20 hours), the process proceeds to the 7-lag reset routine 414 of the second group, and if it is within the last day, the process directly proceeds to routine number 00& in FIG. Also, routine 4
If the process proceeds to step 14, '1' is determined at determination step 413.
! All the flags in the second group for which it is determined that the above period has elapsed are reset, and the run F operation of the corresponding counter is disabled. The process then proceeds to the next routine 400&.

A self-diagnosis processing routine 400 shown in FIG.
& In accordance with predetermined judgment standards, the central control device 6
Perform a self-diagnosis. That is, the microphone computer 6a of the central control device 6 checks the original level under certain conditions of the input signal line to the central control device 1j6, the presence or absence of a signal within a certain period, etc.
If the input signal is outside the standard, it is determined that there is an abnormality somewhere in the input system of the input signal, and the other control device 41.
It is stored in the same way as the diagnosis abnormality information sent from numbers 4b, 4o, and d. In addition, this self-diagnosis may include diagnosing by monitoring the output signal with a separate circuit, checking the program ROM depending on the microcomputer, and checking the R system when the power supply is turned on.

This routine 400 is followed by a decision step 500.

In this judgment step 500, the information on the S switch IC inputted in the routine 300 is judged by the S switch 7 lag, and if the S switch flag is set, the information is passed through the diagnosis information initial setting routine 1100 to the initial setting routine. The process returns to 200, and if it is set, the process proceeds to the next display item selection routine 600. And routine 110
If it advances to 0, all the abnormality flags of the first group and the second group of the diagnosis abnormality information are reset, and the 7 lag is also reset.

Furthermore, when proceeding to the display item selection routine 600,
Based on the information input in routine 300 and routine number 00, the items to be displayed on the display device 7 are selected according to the predetermined display priority order, and the contents of the selected items are sent to the display device 7 by commands. Set in the display command register to be stored.

This display command includes a command to turn on a warning light and a command to turn on a buzzer, and the command to turn on a warning light and a command to turn on a buzzer can be executed in parallel with the display command for the selected display item. This display item selection routine 600 will be explained with reference to the detailed flowchart of FIG.

When entering this display item selection routine 600, first flag A is selected.
Proceeding to step 601 where the value of is determined, routine 406
．． 412)/Reset 7 lag is checked, and if it is set, it is determined that a diagnostic abnormality of high importance is currently occurring in some control device, and the process proceeds to the warning light lighting command routine 602. A warning light display command for lighting up a warning light to prompt the driver to make repairs promptly is set in the display command register. Also, if the flabum has been checked and reset, it is determined that no diagnostic abnormality of high importance has occurred in all systems of the vehicle at this time, and the process proceeds to the warning light extinguishing routine 603, where a warning light extinguishing command is issued to extinguish the warning light. Set in the display command register. Then, the process proceeds to determination step 604 & in which the next first diagnosis switch flag is determined.

In this judgment step 604a, the routine 300 described above
) / Determines the value of the first diagnosis switch flag to be reset, and if it is set, determines that a request to display the first diagnosis information has occurred, and displays the first diagnosis. Proceed to command routine 608&. This first diagnosis display command routine 6
0s&, the codes for distinguishing the control devices as shown in Figure 2 (1), (ri, (3)) and each control device 4&, 4b,
In order to display on the display device a combination display of item codes for distinguishing the contents of diagnosis abnormalities of 4o%4d, display commands corresponding to each display are stored in the display command register. The code that distinguishes this control device is shown in Figure 2←), (2)
, (More M/G (engine controller) shown in @, A/(+ (air conditioner controller), ms
a (skid controller), and A (not shown)
/D (auto drive controller) etc. is used. Further, the diagnosis abnormality classification 2F for each control device 4a, 4b, 4eS46 is expressed in Arabic numerals such as "01", "02", and "11". The detailed arithmetic processing of this first diagnosis display command routine 605& is shown in FIG.

In response to the above-mentioned operation, if there are multiple diagnosis abnormalities, display command commands are issued at a certain period (for example, 2 seconds) in order of the lowest address number in one group, that is, in a predetermined priority order. Rewrite cyclically. Furthermore, if there is no diagnostic abnormality item to be displayed in one group, simply use "OK" to indicate that there is no abnormality.

Next, if the determination in the determination routine 604 & is NO, the process proceeds to determination step 6041 in which the next second diagnosis switch flag is determined. This determination step 604b
Next, determine the value of the second diagnosis switch flag that is set/reset in the routine 300 described above,
If it is set, it is determined that a request to display the first and second diagnosis information (group 1, group 2) has been generated, and the routine advances to the second diagnosis display command routine 605b. In this diagnosis display command routine 605b, codes for distinguishing the control devices as shown in FIG.

40S4 (to display on the display device a combination of item codes that distinguish the diagnostic abnormality contents of l.
Set the display command corresponding to each display in the display command register. Also, for items for which an abnormality flag is set for both groups 1 and 2, it is determined that the abnormality is continuing and the lamp is used as a warning light. A warning light lighting command is also set in the display command register so that b is lit at the same time as the diagnosis error item display, and abnormalities that are currently occurring and those that have occurred in the past are distinguished and displayed by turning on/off the warning light. do. In this case as well, for multiple diagnosis abnormalities, the first diagnosis display command routine 605
Similar to the calculation process of &, the display is cyclically rewritten at a fixed period (for example, 2 seconds). Therefore, the user can prepare a correspondence table between diagnosis abnormality item codes and abnormality contents, and use the table to know the contents of the diagnosis abnormality and use it as a source of information for troubleshooting. When determining this abnormality code, it is desirable to use the same code for different vehicle models if the abnormality content is the same, and it is also desirable for the troubleshooter to classify codes according to the abnormality content to some extent. Next, if the determination in the eighth diagnosis switch flag determination step 6041 is NO, the process advances to determination step 606 in which it is determined whether or not there is an OK monitor display item, which is the next display priority.

In this judgment step 606, all values of the flag group of each Ox monitor item set/reset in the information search routine sOO are judged, and if one or more of them is set, it is judged that there is an OK monitor display item. OK, the program proceeds to step 60 of the monitor display command routine. In this OK monitor display command routine 60, the content of the abnormality to be warned to the driver as the 01 monitor is determined according to the setting of the OK monitor abnormality flag set in the information search routine 300 (5) and (6) in FIG. ), ←), (8), and (9), a display command corresponding to each display is set in the display command register so as to display a word using alphabetic or katakana characters. Incidentally, when setting the display commands for ``engine Gxmy'' for forgetting to remove the key and for forgetting to turn on the light [x, xanr swJ] into the display command register, a command to turn on the buzzer is also set at the same time.

This (D [IG KMYJ “LIGHT SW
The display command registers are set to J and Pose On for a certain period of time (for example, 10 seconds). Both of these two items generate a warning when the driver attempts to exit the vehicle by turning off the ignition key switch 9o and opening the door, so a buzzer is also used to attract the driver's attention. If there are a plurality of OX monitor items to be displayed, the display command is cyclically rewritten at a fixed period (for example, 5 seconds) as in the calculation process of the first diagnosis display command routine 6o5&. Also, judgment step 60
If it is determined in step g that there is no OK monitor item to be displayed, the process advances to determination step 608 in which it is determined whether or not the next display priority order of auto drive and speed winner is to be displayed.

In this judgment step 608, the communication information processing routine 40
The operation information of the auto drive and the speed winner processed in step 0 are determined, and if there is information that either of them is operating, the process goes to the auto drive or speed winner operation display command routine 609. This auto drive and speed winner operation display command routine 609
Figure 2 (1o), (11), (12), (13) shows the display according to the operating state of Auto Drive and SpeedWoner, whichever is determined to be currently operating.
In order to display as shown in , set the display command corresponding to each display in the display command register. The display example "Atrro I) R Engineering vmJ" is an operation display indicating that vehicle speed control is in progress, and "A/D 10100K is currently in the canceled state, but the vehicle speed setting for vehicle speed control has already been set, and the resume switch ( (not shown) presses Zo.

It represents an operating state in which control can be initiated towards automatic operation at a speed of K wing/h. "A/DM artificial summer" represents an operating state in which the main power of the vehicle speed control device 4b is simply turned on. [8/W 601CMJ
indicates that the lower limit vehicle speed at which the vehicle speed warning device operates and issues an alarm is set at 60 KM/h, and the vehicle is currently traveling below that set vehicle speed. Further, the blinking of the display indicates that the current traveling vehicle speed is higher than the set vehicle speed, and the blinking of the display gives a warning to the driver. (Details about this function are not explained) Also, judgment step 60g
When it is determined that the auto drive and speed winner are not operating, the process proceeds to step 610, where it is determined whether or not to display the engine speed, which is the next display priority.

In this determination step 610, it is determined whether or not the engine is rotating based on the engine rotation speed information processed in the communication information processing routine 400, and when it is determined that the engine is rotating, the process advances to the engine rotation speed display command routine 611. The number of engine revolutions processed in routine 400! !
[Set the display command corresponding to the display shown in (14) in the display command register. Further, when it is determined in the determination routine 610 that the engine is not rotating,
The process advances to a routine 612 that instructs to display the battery voltage or room temperature, which is the last display priority.

This display command routine 612 is the information search routine 300.
The battery voltage and room temperature information entered in
), (xa), display commands corresponding to each display are set in the display cape register. The display command routines 605 m, 605b, 60'7.609.6 described below
After executing the routine 11.61g, the process advances to the next display control routine 700 shown in FIG.

This display control routine 700 sends a character display and warning light lighting command to the display device 7 according to the display command set in the display command register in the display item selection routine 600 described above, and also sends a command to the buzzer 8 to display a character and turn on a warning light. Sends a buzzer activation signal. The arithmetic processing of this routine 700 is performed in the 9th v.
! This will be explained according to the detailed calculation flowchart shown in J. First, when this routine 700 is entered, the process proceeds to a step '701 for determining whether or not there is a buzzer activation command, and the routine F02 refers to the buzzer activation command flag in the display command register and turns on the buzzer drive transistor if the flag is set.
Proceed to. Also, if the buzzer activation command flag is reset, a routine flow that turns off the buzzer drive transistor is executed.
Proceed to step 3. This routine F02 or F03 is followed by a transmission data presence/absence flag determination step F04. This is a flag to indicate the existence of this transmission data. This 7-5F
If the flag is set, the arithmetic processing of this routine F00 is completed without doing anything. However, if the transmission data presence/absence flag has been reset, the process advances to routine 06, and a character code string (for example, [HIAD LAMP J , an 8-bit character code is provided for each character string) and a 1-digit data code for instructing blinking of the display and turning on/off of the warning light is written into the transmission buffer register. Then, in the subsequent routine 706, the transmission data flag is set, and the digit counter and bit counter used in the serial data transmission routine 900 are set to predetermined values (both the digit counter and the bit counter are 11). Then, the arithmetic processing of routine 700 is completed, and the process returns to information retrieval routine 300 according to the flowchart in FIG.

Next, regarding the data transmission routine 900 in the interrupt routine of FIG. 4, the detailed calculation flowchart in FIG.
This will be explained in accordance with the configuration diagram of serial transmission data shown in FIG. In Figure 13, (η is the timing chart of the transmission data splitter. As shown in the figure, there are 8 TX (start-off text) codes, 1 character code from data 1 to data page (one of which is the display blinking and warning light). This shows the timing at which the command data code for turning on/off the light) and the 1eτX (end-off text) code are serially transmitted in order. 8 occurs when
? ! Start sending the code.

Again, l'l'! At the same time as the code transmission is completed, the transmission data presence/absence flag is reset. Also, (1) in Figure 14
, (2), (3), (4), and (5) are the 1st St diagram note fi transmission (fj * intang (timing for the transmission data digit)), and (1) is l m s e
Tie for every o! Indicates interrupt generation timing. (3) indicates the timing to subtract one from the digit counter explained in Figure 1O. (4) indicates the first
This shows the timing at which the bit counter is decremented by one, as explained in Figure 0. This is synchronized with the occurrence of an interrupt. (5) is the first
The bit counter set timing explained in Figure 0 is shown, and this occurs when the digit counter is not yet 0 after transmitting one digit worth of character codes (including the one for Heragu). Furthermore, FIG. 15 shows the structure of one digit of this serial transmission data.

The transmission speed of this serial transmission data is 1000 bits/
Each second consists of 1 start bit (level low), 8 data bits (positive logic), 1 parity bit, and 1 stop bit (level high). In FIG. 1O, when data transmission routine 900 is entered, the process first proceeds to transmission data presence/absence flag determination step 901, where the value of the transmission data presence/absence flag is determined. If the flag is reset, the arithmetic processing of routine 900 is immediately terminated; if the flag is set, it is determined that there is display data to be transmitted, and the flow proceeds to the next routine 902.

In this routine 902, the value of the bit indicated by the digit counter in the transmit buffer register and the bit position counter (bit counter) of each digit is read from the transmit buffer register, and the transmit tB power signal is set to high or low depending on the value. level.

Then, the process advances to the next routine 903, where the value of the bit counter is decremented by one. Then, the process proceeds to judgment step 904 to judge the value of this bit counter, and it is judged whether or not the value of the bit counter is O. If it is not 0, the arithmetic processing of this routine 900 is ended, but if Proceeding to the next digit counter subtraction routine 905, the digit counter is subtracted by one. Then, the process advances to judgment step 906 to judge the value of the next digit counter, and if the digit counter is O, routine 9
It advances to 0 and resets the transmission data presence/absence flag. If the value of the digit counter is not 0, the routine advances to routine 908 for setting the bit counter to a predetermined value. That is, in this data transmission routine 900, while the data presence/absence flag is set, each time a timer interrupt occurs, the display character code set in the transmission buffer register is read one bit at a time, and the corresponding bit is read out. The transmission output is set to high/me level, thereby transmitting serial data to the display device.

In addition, in the above embodiment, when a plurality of abnormality contents of each control device occur, one display 7a is used to switch the display, but the display surface is enlarged and all abnormality contents are displayed in parallel. may be displayed.

As described above, in the present invention, a plurality of control devices that perform control independently according to a predetermined control program are provided with a function of detecting a control abnormality of the control device itself and generating an abnormality signal. Since the generation of abnormal signals from the control device of the vehicle is centrally managed by the central control device, and the details of the abnormality occurrence are displayed on the display device in response to the generation of the abnormal signal, it is possible to It is possible to make the driver of the vehicle aware of the details of an abnormality in a specific control device, and by centrally managing the presence or absence of an abnormality signal from each control device, it is possible to switch and display the abnormality contents on one display means and prioritize the display. It has an excellent effect in that it is also possible to provide additional functions such as the addition of .

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing one embodiment of the present invention, Fig. 2 is an explanatory display diagram for explaining the operation, and Figs. FIG. 11 is a configuration diagram showing the configuration of serial reception data, FIGS. 12 to 14 are timing charts for explaining the operation, and FIG. 15 is a configuration diagram showing the configuration of serial transmission data. be. DESCRIPTION OF SYMBOLS 1... Switch group, 2--Detector group, 4... Control device group, 6-- Central control device, 6m-- Microcomputer, 7-- Display device. Representative Patent Attorney Takashi Okabe @ 3 Figure [4 Meat

Claims (1)

[Claims] (1) In a vehicle equipped with a plurality of control devices that independently control each control target part of the vehicle according to a predetermined control program, an abnormality is detected in the plurality of control devices by detecting a control abnormality in the control device itself. Centralized management that allows each control device to have a function of generating a signal, centrally manages the presence or absence of abnormal signals from these multiple control devices for each control device, and generates a display signal corresponding to the generation of the abnormal signal. An abnormality display device for a vehicle, comprising: an abnormality display device; and a display device that displays the content of an abnormality occurrence in a vehicle interior based on a display signal from the central control device. 2. The abnormality display device for a vehicle according to claim 1, wherein each of the plurality of control devices generates an abnormality signal indicating a location where the abnormality has occurred. (The uniformity central control device has a function of storing abnormality signals from a plurality of control devices for each control device. The symbol is the same as the symbol indicating the location where the abnormality occurs in a vehicle according to claim 1 or 2. An abnormality display device for a vehicle according to claim 2 or 3, which is displayed on a display screen. The vehicle abnormality display device according to any one of items 1 to 4.