CN104034527B - A kind of AMT off-line test method - Google Patents

Abstract

An AMT off-line detection test bench of the present invention includes a power unit, a clutch and a host computer; the output end of the power unit is provided with a first flywheel; the pressure plate of the clutch is fixed on the first flywheel, and the friction plate is provided with an output end and a transformer to be tested The transmission shaft connected to the transmission input shaft of the transmission, and the release bearing of the clutch is installed on the transmission shaft; the IO port of the upper computer and the clutch valve of the clutch are respectively connected with the IO port of the control unit of the transmission under test; the IO ports of the upper computer are also respectively Connect the control end of the power unit and the control part of the clutch, and the input port of the upper computer is connected with the feedback part of the clutch. The detection method of the present invention comprises the following steps: 1) testing the air tightness of the transmission to be tested, connecting the wiring harness interface to the air source interface; 2) turning on the power supply for initialization; 3) after entering the self-learning mode; 4) each solenoid valve 5) Test the power take-off switch; 6) Generate a test report and end the detection.

Description

A kind of AMT off-line detection method

technical field

The invention relates to off-line detection of a transmission, in particular to an AMT off-line detection test bench and a detection method thereof.

Background technique

Since the selection and shifting of the electromechanical automatic transmission (AMT) is automatically completed by the electronic control system, the existing off-line testing test bench for the transmission cannot meet the off-line testing requirements of the electromechanical automatic transmission (AMT). On the one hand, the advanced AMT offline testing test bench is expensive, and the cost is too high to adapt to the domestic market. The existing transmission off-line detection test bench needs to be manually shifted, and the AMT's gear selection and clutch separation and engagement are automatically completed by the AMT control unit. Therefore, the existing transmission off-line detection test bench cannot It meets the off-line detection requirements of AMT; while the off-line detection test bench of foreign AMT is not only very expensive, but also does not detect the control of the clutch. Therefore, it is very necessary to develop an AMT offline detection test bench and its corresponding detection method.

Contents of the invention

Aiming at the problems existing in the prior art, the invention provides an AMT off-line detection test bench with low detection cost and comprehensive detection efficiency and a detection method thereof.

The present invention is achieved through the following technical solutions:

An AMT off-line detection test bench of the present invention includes a power unit, a clutch and a host computer; the output end of the power unit is provided with a first flywheel; The transmission shaft connected to the transmission input shaft of the transmission, and the release bearing of the clutch is installed on the transmission shaft; the IO port of the upper computer and the clutch valve of the clutch are respectively connected with the IO port of the control unit of the transmission under test; the IO ports of the upper computer are also respectively Connect the control end of the power unit and the control part of the clutch, and the input port of the upper computer is connected with the feedback part of the clutch.

Preferably, the control components include a half gear valve, a shift solenoid valve, a neutral switch, a reverse gear switch, a range gear valve, a power take-off switch, a brake valve and a clutch valve; the feedback components include an intermediate shaft speed sensor, a mileage Gauge and output shaft speed sensor.

Further, the power device adopts an electric motor, the motor output shaft of the electric motor is fixedly connected with the first flywheel, and the motor controller is connected with the IO port of the upper computer.

Preferably, the present invention also includes a fixed bracket and a mounting stand for installing and fixing the transmission under test, the power unit and the clutch are fixedly supported on the fixed bracket; supporting bearings that cooperate with the transmission shaft are respectively provided on the fixing bracket and the mounting stand.

Preferably, the first flywheel is the same as the flywheel at the output end of the engine matched with the transmission under test.

Preferably, the output end of the transmission shaft is provided with an internal spline to connect with the input shaft of the transmission under test, and the input end is connected to the friction plate through the spline.

Preferably, the part of the transmission shaft located between the clutch and the transmission under test is provided with a second flywheel.

A kind of AMT off-line detection method adopting the AMT off-line detection test bench as further described in the present invention comprises the following steps,

1) Test the air tightness of the transmission under test, check and repair if it is abnormal, fill it with oil and fix it on the installation stand, connect the wiring harness interface of the transmission under test, and connect the air source interface of the transmission under test;

2) Turn on the power for initialization, the upper computer sends an activation command to activate the EOL mode of the control unit, and establishes the unlocking process. If the unlocking process is abnormal, it enters the exception handling mode. In the exception handling mode, the control unit feeds back abnormal information to the upper computer and checks After the cause is recorded, re-execute the operation before the exception handling mode; if it is normal, activate the self-learning mode of the control unit;

3) After entering the self-learning mode, the control unit feeds back the correct information and the recognized box type to the upper computer, and records the values of each sensor. If the values of each sensor are abnormal, it will enter the abnormal processing mode. If it is normal, the control unit will test the status of each solenoid valve and sensor signals;

4) When testing the state of each solenoid valve and the sensor signal, if abnormal, enter the abnormal processing mode, and if normal, the control unit tests the power take-off switch;

5) When testing the power take-off switch, if it is abnormal, it will enter the exception processing mode. If it is normal, it will enter the shift process according to the shift command issued by the host computer. The control unit is responsible for the shift synchronization and completes the shift of the transmission under test. Each sensor and solenoid valve is tested by the control unit, and each switch and odometer is tested by the host computer;

6) If the shifting process is abnormal, it will enter the exception processing mode. If it is normal, the upper computer will save the test data and generate a test report; finally, the transmission under test will be disassembled and off-line, and the oil will be drained to end the test.

Preferably, the upper computer sends an activation instruction to the control unit in the form of a CAN message in the format of the KWP2000 protocol to activate the EOL mode of the control unit; the upper computer sends a shift instruction to the control unit through the diagnosis protocol KWP2000.

Preferably, in the exception handling mode, the host computer reads the fault codes recorded by the control unit, analyzes the fault codes, and displays fault information.

Compared with the prior art, the present invention has the following beneficial technical effects:

The present invention utilizes the power device to provide external power input, completes the control of the power input through the clutch, realizes unified control and coordinated action on the clutch and the control unit of the transmission under test through the host computer, and avoids the repeated process of separate testing for a single detection item ; And during the monitoring, not only the transmission, but also the clutch is inspected, and the AMT system is inspected as a whole, thereby reducing the inspection cost of AMT; the structure is simple, the design is reasonable, and it can fully meet the AMT offline inspection requirements of different box types .

Furthermore, by integrating the inspection of the clutch into the inspection of the AMT system; the output end of the power unit is provided with the first flywheel connected to the clutch, which can install the clutch and control its disengagement and engagement, making the inspection more comprehensive and in line with the actual situation of the AMT system Working state; moreover, the state when the AMT is offline is equipped with a clutch housing, so that it can be fixed on the fixing bracket and the installation stand simply and quickly.

The detection method of the present invention utilizes the detection work of the control detection platform in the upper computer, and the operation is stable and the operation is simple. After the AMT is offline, the operator only needs to fix the AMT on the test platform, and connect the wiring harness connector and the gas source, press the test switch, the system can automatically complete the off-line detection process according to the control logic; and can generate a test report containing test data for each AMT; it can enable the testing personnel to easily call out the detailed off-line information of each AMT , tracking test.

Furthermore, by setting the AMT off-line detection and control program based on the KWP2000 protocol, accurate, fast and stable data communication between the controller and the diagnostic platform is realized, and the detection efficiency and detection accuracy are improved.

Description of drawings

Fig. 1 is a connection structure diagram when the test bench of the present invention is in use.

Fig. 2 is an enlarged schematic diagram of the connection structure between the power unit and the transmission under test in Fig. 1 .

Fig. 3 is a control logic block diagram of the method of the present invention.

Fig. 4 is a block diagram of the test flow of the method of the present invention.

In the figure: motor 1, motor controller 2, motor output shaft 3, support bearing 4, first flywheel 5, friction plate 6, pressure plate 7, release bearing 8, clutch 9, fixed bracket 10, second flywheel 11, installation Bench 12, half gear valve 13, intermediate shaft speed sensor 14, selector shift solenoid valve 15, neutral gear switch 16, reverse gear switch 17, range gear valve 18, power take-off switch 19, upper computer 20, control unit 21, Odometer 22, output shaft rotational speed sensor 23, tested transmission 24, brake valve 27, transmission input shaft 28, clutch valve 29, transmission shaft 30.

detailed description

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

A kind of AMT off-line detection test bench of the present invention, as shown in Figure 1, it comprises power unit, clutch 9 and upper computer 20; Power unit output end is provided with the first flywheel 5; The pressure plate 7 of clutch 9 is fixed on the first On the flywheel 5, the friction plate 6 is provided with a transmission shaft 30 whose output end is connected to the transmission input shaft 28 of the transmission under test 24, and the release bearing 8 of the clutch 9 is mounted on the transmission shaft 30; the IO port of the host computer 20 and the clutch The clutch valve 29 of 9 is connected with the IO port of the control unit 21 of the transmission 24 under test respectively; feedback widget.

Among them, as shown in Figure 1 and Figure 3, the control components include a half gear valve 13, a selector shift solenoid valve 15, a neutral switch 16, a reverse gear switch 17, a range gear valve 18, a power take-off switch 19, a brake valve 27 and a clutch Valve 29 ; the feedback components include an intermediate shaft speed sensor 14 , an odometer 22 and an output shaft speed sensor 23 . In this preferred example, the motor 1 is used as the power device, the motor output shaft 3 of the motor 1 is fixedly connected to the first flywheel 5 , and the motor controller 2 is connected to the IO port of the host computer 20 .

As shown in Fig. 1 and Fig. 2, detection platform of the present invention also comprises fixed support 10 and is used for installing and fixing the installation stand 12 of tested speed changer 24, fixed support power unit and clutch 9 are fixed on the fixed support 10; 10 and the installation stand 12 are respectively provided with supporting bearings 4 that cooperate with the transmission shaft 30 . The first flywheel 5 is identical to the flywheel at the output end of the engine matched with the transmission 24 under test.

As shown in Figure 2, the output end of the transmission shaft 30 is provided with an internal spline to be connected to the input shaft of the transmission 24 under test, and the input end is connected to the friction plate 6 through a spline; the transmission shaft 30 is located at the part of the clutch 9 and the transmission 24 under test A second flywheel 11 is provided.

A kind of AMT off-line detection method adopting the above-mentioned AMT off-line detection test bench of the present invention, as shown in Figure 3 and Figure 4, it comprises the following steps,

1) Test the airtightness of the transmission 24 under test, check and repair if it is abnormal, fill it with oil and fix it on the installation stand 12 after it is normal, connect the wiring harness interface 26 of the transmission under test 24, and connect the wire harness of the transmission under test 24 Air source interface 25;

2) Turn on the power for initialization, the upper computer 20 sends an activation command to activate the EOL mode of the control unit 21, and establishes the unlocking process. If the establishment of the unlocking process is abnormal, it enters the exception handling mode. In the exception handling mode, the control unit 21 feeds back the abnormality to the upper computer 20 information, and re-execute the operation before the exception handling mode after checking the cause record; if normal, then activate the self-learning mode of the control unit 21;

3) After entering the self-learning mode, the control unit 21 feeds back the correct information and the identified box type to the upper computer, records the values of each sensor, and enters the abnormal processing mode if the values of each sensor are abnormal, and if it is normal, the control unit 21 tests each solenoid valve status and sensor signals;

4) When the state of each solenoid valve and the sensor signal are tested, if it is abnormal, it will enter the abnormal processing mode, and if it is normal, the control unit 21 will test the power take-off switch 19;

5) When the power take-off switch 19 is tested, if it is abnormal, it will enter the abnormal processing mode. If it is normal, it will enter the shift process according to the shift command sent by the host computer 20. Shift gears, and test each sensor and electromagnetic valve by control unit 21 simultaneously, test each switch and odometer by host computer 20;

6) If the gear shift process is abnormal, enter the abnormal processing mode, if normal, the upper computer 20 saves the test data and generates a test report; finally, the transmission 24 under test is disassembled and off-line, and the oil is drained to end the test.

Wherein, as shown in Figure 3, the host computer 20 sends an activation instruction to the control unit 21 in the form of a CAN message in the format of the KWP2000 protocol to activate the EOL mode of the control unit 21; Shift command. As shown in FIG. 4 , in the exception handling mode, the host computer 20 reads the fault codes recorded by the control unit 21 , analyzes the fault codes, and displays fault information.

Specifically, the control and detection process of the AMT off-line detection test bench of the present invention is shown in Figure 3.

a. The upper computer sends commands to the control unit 21 (TCU) on CAN1 in the form of CAN messages in the format of the KWP2000 protocol to activate the EOL mode of the TCU. First, an unlocking process needs to be established.

b. After the TCU enters the EOL mode, it feeds back correct information to the host computer 20 . The upper computer sends instructions to the TCU through the diagnostic protocol KWP2000, and the TCU is responsible for shifting synchronization and completing the shifting of the AMT. In this process, the TCU needs to control the brake valve 27 (TB valve) according to the shift command and receive the measured feedback, control the half gear valve 13 and receive the feedback of its displacement signal, and control the selector shift solenoid valve (XY valve) 15 And receive the feedback of its displacement signal, control the feedback of the displacement signal of the range gear valve 18, control the clutch valve 29 and receive the feedback of its displacement signal, receive the intermediate shaft speed measured by the intermediate shaft speed sensor 14 and the output shaft speed sensor 23. output shaft speed.

c. The host computer 20 directly controls the motor 1 and the accessories and accepts its feedback, and other parts of the test bench according to the test process as shown in Figure 4 and the requirements of the TCU, through the test method of the present invention;

d. The upper computer 20 directly measures whether the opening and closing of the reverse gear switch 17 is normal;

e. The host computer 20 directly measures whether the opening and closing of the neutral switch 16 is normal;

f. The upper computer 20 directly measures whether the opening and closing of the power take-off switch 19 is normal;

g. The upper computer 20 directly measures whether the output of the odometer 22 is normal;

h. The upper computer 20 reads the fault code and analyzes the fault code, and displays the fault information;

i. The upper computer 20 controls the whole offline detection process, using the method of the present invention, as shown in Figure 4;

j. The upper computer 20 saves the test data and automatically generates a test report.

Claims (3)

1. an AMT off-line test method, it is characterised in that the AMT off-line test testing stand of employing Including power set, clutch (9) and host computer (20)；Described power set output is provided with First flywheel (5)；The platen (7) of described clutch (9) is fixed on the first flywheel (5), rubs The biography that output is connected it is provided with the transmission input shaft (28) of tested speed changer (24) in pad (6) Moving axis (30), release bearing (8) cooperation of clutch (9) is arranged on power transmission shaft (30)；Upper The I/O port of machine (20) and the clutch valve (29) of clutch (9) respectively with tested speed changer (24) Control unit (21) I/O port connect；The I/O port of host computer (20) is also respectively connected with power The control end of device and the control parts of clutch (9), the input port of host computer (20) connects clutch The feedback element of device (9)；

Described control parts include half grade of valve (13), shifting magnetic valve (15), neutral position switch (16), Reverse gear switch (17), scope shelves valve (18), power take-off valve (19), actuator valve (27) and clutch Device valve (29)；Described feedback element include jackshaft speed probe (14), mileometer (22) and OSS (23)；

Described power set use motor (1), the motor output shaft (3) of motor (1) and the One flywheel (5) is fixing to be connected, and electric machine controller (2) is connected with the I/O port of host computer (20)；

Described AMT off-line test method, comprises the steps,

1) test the air-tightness of tested speed changer (24), abnormal then maintenance and inspection, normal after carry out oiling And lifted and be fixed in installation stand (12), connected the wiring harness interface of tested speed changer (24) (26) gas source interface (25) of tested speed changer (24), is connected；

2) switching on power and initialize, host computer (20) sends activation instruction and activates control unit (21) EOL pattern, set up releasing process, if it is abnormal to set up releasing process, enter abnormality processing pattern, Under abnormality processing pattern, control unit (21) feeds back abnormal information to host computer (20), and checks reason The operation before abnormality processing pattern is re-executed after record；If normal, activate control unit (21) Self-studying mode；

3), after entering self-studying mode, control unit (21) feeds back correct information and identification to host computer Box, record each sensor values, if each sensor values is abnormal, enter abnormality processing pattern, If normal, control unit (21) tests state and the sensor signal of each magnetic valve；

4), when the state of each magnetic valve and sensor signal test, if abnormal, abnormality processing pattern is entered, If normal, control unit (21) test power take-off valve (19)；

5), during power take-off valve (19) test, if abnormal, abnormality processing pattern is entered, if normally The shifting commands then sent according to host computer (20) enters gearshift flow process, control unit (21) be responsible for Gearshift synchronizes and completes the gearshift of tested speed changer (24), is tested each biography by control unit (21) simultaneously Sensor and magnetic valve, tested each switch and mileometer by host computer (20)；

6) if gearshift flow process is abnormal, abnormality processing pattern is entered, if normal, by host computer (20) Preserve test data, generate test report；Finally tested speed changer (24) dismounting is rolled off the production line, drains the oil, Detection of end.

A kind of AMT off-line test method the most according to claim 1, it is characterised in that host computer (20) sent to control unit (21) by the form of CAN message with the form of KWP2000 agreement Activation instruction, to activate the EOL pattern of control unit (21)；Host computer passes through diagnosing protocol KWP2000 Shifting commands is sent to control unit (21).

A kind of AMT off-line test method the most according to claim 1, it is characterised in that exception In reason pattern, host computer (20) read control unit (21) failure code that records and resolve fault Code, shows fault message.