JPH0197834A - Apparatus for inspecting artificial running - Google Patents

Abstract

PURPOSE:To conduct the inspection of running on the basis of quantitative measured data and thereby to improve the precision in determination, by a method wherein an acceleration sensor amount is made variable by a resistance for inspection connected in parallel for an acceleration sensor of an automatic-gear vehicle controlled by a microcomputer of an artificial running inspecting apparatus, and various data on the detected states of the vehicle are compared with reference values. CONSTITUTION:An automatic-gear vehicle 1 with a microcomputer is connected to an artificial running inspecting apparatus 2, and the vehicle 1 is controlled with respect to a fuel injection control actuator 6 according to an instruction from the microcomputer 7. A resistance 10 for inspection of the apparatus 2 is connected to an acceleration sensor 8 of this vehicle 1, and the resistance 10 connected to a slide piece 8-1 and an idle-side end part 8-2 of the sensor 8 is made variable by a computer 9, so as to vary an acceleration sensor amount. Besides, the vehicle speed of the vehicle 1 is detected from the data on the state of an engine by a speed sensor 14 of a test roller 3, supplied to the computer 9 of the apparatus 2 and compared with a reference value set beforehand. Thus, a running test of the vehicle 1 is conducted in a quantitative manner.

Description

[Detailed description of the invention] [Industrial application field]

The present invention performs running inspections of automatic vehicles equipped with microcomputers.
The present invention relates to a simulated driving inspection device that can perform testing without actually driving on the road.

[Conventional technology]

2. Description of the Related Art It has been conventional practice to perform running inspections on vehicles, not only automatic vehicles equipped with microcomputers, but without actually driving them on the road. FIG. 7 shows a conventional simulated driving test. 15 is a vehicle, and 3 is a test roller. The drive wheels 15-1 of the vehicle 15 are placed on the test rollers 3, a person gets into the driver's seat, and performs operations such as gear shifting and accelerator pedal depression as if actually driving. Then, it is determined whether the vehicle is normal or not based on the feeling of the driver. In addition, as a document related to technology for controlling engine rotation speed for vehicle testing, there is Utility Model Application Publication No. 58-140454.
There is a publication.

[Problems to be solved by the invention]

However, the above-mentioned conventional technology leaves the judgment of pass/fail to the driver's feeling, so the criteria are ambiguous and there is a problem that the test results vary depending on the person. In view of such problems, it is an object of the present invention to provide quantitative inspection data for at least microcomputer-equipped automatic vehicles so that quality can be determined objectively.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the simulated running inspection device of the present invention is designed to be able to vary the accelerator sensor amount for the accelerator sensor of an automatic vehicle controlled by a microcomputer. It was decided to include test resistors connected in parallel and means for comparing various data related to the detected vehicle condition with a reference value.

[For production]

Since the accelerator sensor amount can be changed by changing the test resistance, the engine rotational state can be changed freely without the need for a person to actually get into the driver's seat and press the accelerator pedal. Then, data regarding the vehicle condition is collected in quantitative form from a microcomputer installed in the microcomputer-equipped automatic vehicle, and this is compared with a predetermined reference value to determine whether or not it is normal. In this way, the judgment results will not vary depending on the person conducting the test, and the judgment accuracy will be improved.

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a simulated running inspection device according to an embodiment of the present invention. In FIG. 1, 1 is an automatic vehicle with a microcomputer, 2 is a simulated driving test device, 3 is a test roller, 4 is a display device, 5 is an engine, 6 is a fuel injection control actuator, 7 is a microcomputer, 8 is an accelerator sensor, 8 -1 is a sliding piece, 9 is a computer, 10 is a test resistor, 11 to 13 are interfaces, and 14 is a vehicle speed sensor. The microcomputer-equipped automatic vehicle 1 is a vehicle in which fuel injection to the engine, clutch engagement/disengagement, gear shifting, etc. are performed by actuators operated by commands from the microcomputer 7. In Figure 1, only the system that controls fuel injection to the engine by the accelerator is in charge (1° The accelerator sensor 8 is a kind of potentiometer or yometer,
The sliding piece 8-1 moves on the accelerator sensor 8 in response to depression of the accelerator pedal. The signal sent from the microcomputer 7 to the fuel injection control actuator 6 is determined by the partial pressure value taken out by the sliding piece 8-1. When the accelerator pedal is fully depressed, the sliding piece 8-
1 is in the F (full) position, and the amount of fuel injected at this time is maximum. A (idle) when in idle state
position, and the least amount of fuel is injected. The simulated running test according to the present invention is also carried out by placing the driving wheels on the test rollers 3 as shown in FIG. The second point is that the test resistor IO of No. 2 is connected, and the second point is that the test data is taken out from the microcomma and the test roller 3 and the computer 9 of the simulated running test device 2 is made to judge the quality. The test is carried out as follows. By varying the testing resistor 10 connected between the sliding piece 8-1 of the accelerator sensor 8 and the idle side end 8-2, the amount of the accelerator sensor is changed. FIG. 5 is a diagram illustrating that the value of the test resistor can change the accelerator sensor amount. If the resistance value of the entire accelerator sensor 8 is R1, the resistance value between the sliding piece 8-1 and the idle side end 8-2 is R1, and the value of the testing resistor 10 is R, then
The accelerator sensor amount Z is determined by the sliding piece 8-1 and the idle side end 8.
It is obtained as a partial voltage resistance value between -2 and Therefore, it can be expressed as R1R+R* (R+R1), and it can be seen that Z can be changed by changing the value R of the test resistor lO. The fuel injection amount is controlled by changing the value R of the test resistor 10 one after another according to commands from the computer 9. Then, data regarding the state of the engine at that time (for example, engine speed) is retrieved from the microcomputer 7. Also, since the test roller 3 rotates according to the speed of rotation of the drive wheel, the test roller 3
The vehicle speed sensor 14 attached to the vehicle detects whether the test vehicle is placed overlapping the vehicle. The data taken in as described above is compared with a predetermined reference value to determine whether it is normal or not, and is displayed on the display device 4. 2 and 3 are flowcharts showing the inspection operation of the simulated running inspection device of FIG. 1. The inspection operation will now be explained in detail. Item numbers ① to 0 in the following explanation correspond to steps ① to 0 in FIGS. 2 and 3. (1) to (2) These steps are steps for determining the value of the test resistor 10, which is a variable resistor. The relationship between the actuator operating amount of the fuel injection control actuator 6 and the accelerator sensor amount is shown in Figure 4, but when performing a simulated driving test, the actuator operating amount must be determined in order to determine the fuel to be injected. . Now, if we set it to a value between Au and AL, the corresponding accelerator sensor amount will be a value between Zt+ and ZL, and the value of the test resistor 10 will be determined by steps It is determined that the conditions are met. By changing the values of Au and AL one after another, tests can be performed under various fuel injection conditions. ■ Gives instructions for engine ignition. ■ Press the start button. (2) The resistor having the value determined in step (2) is actually connected in parallel to the accelerator sensor 8 as the test resistor 10. [Phase] Various data are taken into the computer 9 from the microcomputer 7 and the vehicle speed sensor 14. ■ Disconnect the test resistor 10. ■ From here to step O, an example of processing of inspection data is shown. In this step, it is checked whether the "shift speed rise" is between the upper and lower limit values that indicate the normal range. This is the difference between the engine speed and the engine speed. Figure 6 is a diagram showing changes in various data during a simulated driving test, and Figure 6 (a) shows the change in engine speed when shifting gears (5 solid line) and the change in the rotation speed of the transmission output shaft. The change (point vA) is shown. "Shift speed up" is,
For example, this refers to the rotational speed difference shown by A and B in FIG. 6 (a). ② If the "shift speed up" is outside the normal range, an NG flag is set in the computer 9. 0 Check whether the "shift vehicle speed" is within the normal range. The "shifting vehicle speed" refers to the vehicle speed before the vehicle speed decreases, although the vehicle speed decreases slightly when the gear is shifted to the next gear. Figure 6 (
B) shows the change in vehicle speed, but C,
This is the vehicle speed of D. [Phase] If the "shift vehicle speed" is outside the normal range, an NG flag is set in the computer 9. @ Check whether the "shift time lag" is within the normal range. The "shift time lag" is the time it takes for the engine speed, which once dropped during a shift, to recover to the speed at the time of the shift. tl+i in Figure 6 (a)! It is about. ■ If the "shift time lag" is outside the normal range, an NG flag is set in the computer 9. Although three pieces of data were checked from step O to step O, similar checks will be made for other data as well. [Phase] Check whether all inspected data is normal. This is done depending on whether there is even one NG flag. If there is no ONG flag, the OK lamp on the display device 4 is turned on. If there is even one NG flag, the NG clamp on the display device 4 is lit. [Phase] When the NG clamp lights up, decide whether to perform another inspection.
Return to ◎ Output the inspection slip.

【Effect of the invention】

As described above, according to the present invention, a simulated driving test of an automatic vehicle equipped with a microcomputer is performed based on measured quantitative data, which improves the accuracy of the test and also reduces the variation in judgment results depending on the person conducting the test. I no longer have to go out.

[Brief explanation of the drawing]

Fig. 1: Simulated running inspection device according to an embodiment of the present invention Figs. 2 and 3: Flow chart showing the inspection operation of the simulated running inspection device of Fig. 1 Fig. 4: Accelerator sensor amount Fig. 5 shows the relationship between the value of the test resistance and the actuator operation amount. Fig. 6 shows the change in various data during the simulated driving test. Figure 7 shows the state of a conventional simulated driving test, where l is an automatic car with a microcomputer, 2 is a simulated driving test device, 3 is a test roller, 4 is a display device, 5 is an engine, and 6 is fuel An injection control actuator, 7 a microcomputer, 8 an accelerator sensor, 9 a computer, 10 a testing resistor, 11 to 13 an interface, and 14 a vehicle speed sensor. Patent applicant Isuri Jidosha Co., Ltd.

Claims (1)

[Claims] Equipped with a testing resistor connected in parallel to the accelerator sensor of an automatic vehicle controlled by a microcomputer so as to be able to vary the amount of the accelerator sensor, and a means for comparing various data regarding the detected vehicle condition with a reference value. A simulated running inspection device featuring: