JPH0877408A - Method for measuring exhaust gas discharge amount - Google Patents

Abstract

PURPOSE: To measure the discharge amount of exhaust gas without using an exhaust gas analyzing device by performing proper operation by using travel information and exhaust gas characteristic data showing the correlation between engine types and exhaust gas amounts inputted to a computer. CONSTITUTION: When the discharge amount of exhaust gas is measured, a vehicle 3 is made to run and data from sensors 1a-1c are inputted to an operation managing meter 2 throughout the travel of the vehicle 3 and recorded on a recording medium 11 loaded in the operation managing meter 2 together with time data. Operation management data are also inputted to the operation managing meter 2. After the travel ends, the recording medium 11 is taken out of the operation managing meter 2 and loaded in a reader 8, so that its data are gathered by a personal computer 10. The personal computer 10 already inputs basic information, e.g. engine type, displacement, etc., by vehicles 3 and the travel information is calculated on the basis of the exhaust gas characteristic data to calculate the exhaust gas displacement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new and useful exhaust gas emission measuring method.

[0002]

2. Description of the Related Art In recent years, global environmental problems have increased, and exhaust gas emitted from vehicles such as automobiles tends to be more strictly regulated. For example, CO, THC (Total Hydro Carbo
The concentrations of individual gases such as n) and NO _x can be measured by an exhaust gas analyzer that quantitatively measures these specific components. On the other hand, as the means for measuring the amount of the exhaust gas, conventionally, the exhaust gas analyzer has been used only. This is because the direct meaning or necessity of measuring the amount of exhaust gas was not so high.

By the way, recently, there has been a demand for collecting data on the amount of exhaust gas from a vehicle which is actually running, but as described above, an exhaust gas analyzer is used. It was only done using.

[0004]

However, in the method using the above exhaust gas analysis device, this device must be mounted on the vehicle, and this kind of device is quite expensive, and is used only for measuring the exhaust gas amount. Things are not very practical.

By the way, it is known that the amount of exhaust gas from a vehicle is determined, for example, by knowing the model of the vehicle engine, the vehicle speed, the engine speed, and the gear position or torque amount. However, conventionally, there has been no method for inexpensively measuring the vehicle speed, the engine speed, the gear position, the torque amount, and the like.

On the other hand, in recent years, an operation management system has been developed in which the contents of the crew record, which the crew members record by hand every day, the distance traveled, etc. are automatically recorded and output from the computer in the office after returning to the office. , Is now put to practical use.

As shown in FIG. 2, the operation management system can be roughly divided into a vehicle side and an office side. That is, on the vehicle side, a plurality of sensors 1 for respectively detecting the vehicle speed, the engine speed, the door open / closed state, and the like, and an operation management meter 2 are provided. The operation management device 2 is attached to a vehicle (for example, a truck) 3 and is a sensor box 4 that is a device that collects signals from a plurality of sensors 1, and a registration terminal 5 that is carried by a crew member and that registers work and the like. And an in-vehicle adapter 6 which is attached to the vehicle 3 and serves as an interface between the sensor box 4 and the registration terminal 5.

The registration terminal 5 has a function of recording the work of the crew member, recording the automatic sampling data from the sensor box 4, displaying the input items, and controlling the bar code reader 7. Although not shown in detail, the operation panel 5A has "loading".
In addition to 10 types of work item input keys such as
"Actual / empty" key that indicates whether or not there is a load, "Highway / Indicates whether the road you are driving is an expressway or a general road"
An input unit 5a for inputting various events of the vehicle 3, such as a "general" key, and a display unit 5b (for example, 3 lines can be displayed with 16 characters per line) for displaying these events by characters, symbols or figures are provided. Attendants work and vehicles 3
Input the event with the key according to the state of.

Further, the sensor box 4 is pre-programmed with a function capable of automatically collecting traveling information such as the number of the vehicle 3 (plate number, etc.), vehicle speed, engine speed, cumulative traveling distance, door open / closed state and the like. When the registration terminal 5 is set in the in-vehicle adapter 6, the traveling information collected by the sensor box 4 is registered in the registration terminal 5
Will be recorded automatically. In addition, the registration terminal 5 has a nickel-cadmium battery built into it,
It is configured to be used even when away from.

On the other hand, the office side has a reading device 8 having a function of temporarily storing the information (data) recorded in the registration terminal 5 and registering the work situation and work.
A printer 9 for printing data in the reading device 8 and data recorded in the registration terminal 5 and a personal computer (hereinafter referred to as a personal computer) 10, for example, are configured by three members.

Based on the data received from the reading device 8, the personal computer 10 creates a daily driving report and a vehicle management form that match each application. Further, the reading device 8 controls the printer 9, communicates with the registration terminal 5, and further transmits to the personal computer 10.

As described above, according to the operation management system, operation management, vehicle management, physical distribution management, labor management, etc. can be performed. In addition, the traveling management device 2 mounted on the vehicle 3 collects and records the traveling information of the vehicle such as the speed of the vehicle 3 and the engine speed over time, and automatically performs the recording.

On the other hand, as described above, the amount of exhaust gas from the vehicle is, for example, the type of the engine of the automobile, the vehicle speed,
It is determined by knowing the engine speed and the gear position or torque amount.

The present invention has been made in consideration of the above matters, and an object thereof is to provide a method capable of measuring an exhaust gas emission amount without mounting an exhaust gas analyzer on a vehicle.

[0015]

In order to achieve the above object, an exhaust gas emission measuring method according to the present invention is such that an operation management meter mounted on a vehicle sequentially and automatically records vehicle speed and engine speed as traveling information. In the computer, the traveling information and exhaust gas characteristic data indicating the correlation between the engine type and the exhaust gas amount, which are input in advance in the computer, are used to perform an appropriate calculation, thereby The amount of exhaust gas during running is calculated.

[0016]

The vehicle speed, engine speed, gear position or torque amount, for example, during traveling of the vehicle are automatically collected and recorded in the operation management meter as traveling information. The recorded traveling information is taken up by, for example, a personal computer via a reading device provided in an office, for example.

On the other hand, exhaust gas characteristic data for each vehicle type (engine type) measured by using a chassis dynamometer is previously input to the personal computer, and the vehicle speed and the like are calculated by using the traveling information and the exhaust gas characteristic data. The amount of exhaust gas is calculated from the data, and the result is displayed or printed out or stored as data in an appropriate memory.

[0018]

1 shows an embodiment of the present invention.
In this figure, the same reference numerals as those in FIG. 2 indicate the same or corresponding parts. In FIG. 1, 1a, 1b, and 1c are sensors provided in the vehicle 3, which are a speed sensor, an engine speed sensor, and a gear position sensor, respectively. Of these sensors 1a to 1c, the former two 1a and 1b were also provided in the operation management meter 2, but the gear position sensor 1c
Is newly provided. That is, the gear position sensor 1c detects whether the position of the shift gear is, for example, the 1st position, the 3rd position, or the neutral position. The outputs of these sensors 1a to 1c are configured to be input to the operation management device 2 together with time data, for example, every moment. In addition to the output signals from the sensors 1a to 1c, information input to the operation management device 2 via the input unit 5a of the registration terminal 5 (operation management data).
Needless to say, is also entered.

Reference numeral 11 denotes a recording medium composed of a floppy disk, a memory card, a memory cartridge, etc., which is detachably attached to both the operation control meter 2 and the reading device 8. The traveling medium is obtained by the sensors 1a to 1c. Information and operation management data input via the input unit 5a of the registration terminal 5 are also recorded together with the time data.

In this embodiment, the personal computer 10 is supplied with basic information for each vehicle 3, for example, data such as vehicle type, engine type and displacement, and is measured using a chassis dynamometer. Exhaust gas characteristic data for each vehicle type (engine type) is input in advance. Here, the chassis dynamometer is
For example, Japanese Patent Publication No. 5-2179 and Japanese Patent Publication No. 6-8775.
As disclosed in Japanese Unexamined Patent Publication (Kokai), it is a device for testing the running performance of a vehicle such as a completed automobile when the vehicle is run according to a running pattern determined by various modes.

In order to measure the exhaust gas emission amount, the vehicle 3 is run, and the data from the sensors 1a to 1c are input to the operation management unit 2 while the vehicle 3 is running. It is recorded on the recording medium 11 loaded in the management device 2. Since operation management data is also input to the operation management device 2, this data is also recorded in the recording medium 11 together with the time data.

Then, for example, when one day of running is completed,
The recording medium 11 is taken out from the operation control meter 2 and applied to the reading device 8 provided in the office, and all the data including accumulated traveling information is taken up by the personal computer 10 via the reading device 8. To be At this time, what kind of vehicle the downloaded data is,
The car type and car number are also downloaded as data.

As described above, the traveling information taken up by the personal computer 10 is processed by the personal computer 10,
At this time, basic information for each vehicle 3, such as vehicle type, engine type, and displacement, is input to the personal computer 10, and the vehicle type (engine type) is input.
Since the exhaust gas characteristic data for each is input in advance, the traveling information is calculated based on the exhaust gas characteristic data, and the exhaust gas amount is calculated. In this case, not only the exhaust gas amount for each gear position and speed but also the total exhaust gas amount can be obtained. The amount of exhaust gas thus obtained can be displayed or printed out, or can be stored as data in an appropriate memory to be used as a material for NO _x regulation or the like.

In the above embodiment, the vehicle speed, the engine speed, and the gear position are input to the operation management meter 2. However, instead of the gear position, the torque amount is input. May be. That is, instead of the gear position sensor, a torque sensor may be provided in the vehicle 3 and the output of this sensor may be input to the operation management device 2.
Other travel information, such as cylinder pressure, knocking sensor, engine internal temperature, fuel injection amount, air supply amount, oxygen concentration after leaving the engine, may be input to the operation management device 2. .

[0025]

As described above, according to the present invention, the exhaust gas emission amount can be easily measured by using the conventional operation control meter without mounting the exhaust gas analyzer on the vehicle. The configuration of the device mounted on the vehicle is simplified and the measurement can be performed at low cost.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an exhaust gas emission measuring method of the present invention.

FIG. 2 is a diagram for explaining a configuration of a conventional operation management system.

[Explanation of symbols]

 2 ... Operation management total, 3 ... Vehicle, 10 ... Computer.

Claims (1)

[Claims] 1. An operation management meter mounted on a vehicle, automatically collects and records vehicle speed, engine speed, etc. as traveling information, and stores the traveling information in a computer in advance. An exhaust gas emission measuring method, characterized in that an exhaust gas amount during running of the vehicle is obtained by performing an appropriate calculation by using an exhaust gas characteristic data showing a correlation between an engine type and an exhaust gas amount.