JP5086985B2 - Vehicle inspection apparatus and inspection method - Google Patents

Description

  The present invention relates to a vehicle inspection apparatus and inspection method. More specifically, the present invention relates to an inspection device and an inspection method for inspecting the disconnection of a vehicle clutch.

  Conventionally, a finished product of a motorcycle manufactured in a manufacturing factory is inspected as to whether or not the parts constituting the motorcycle operate properly, and only those that are determined to be non-defective products by this inspection are shipped. Such an inspection of a motorcycle is performed by using, for example, an inspection apparatus disclosed in Patent Document 1.

  In recent years, motorcycles equipped with an automatic transmission that automatically performs a shift operation in accordance with the vehicle speed, engine speed, and throttle opening have been developed. Such a motorcycle has an automatic disconnection function that automatically disconnects the clutch before the engine speed drops to the idling speed when shifting from the normal driving state to the idling state.

Conventionally, the inspection relating to the automatic clutch disengagement function, that is, the determination of whether or not the clutch has been disengaged at an appropriate time is performed according to the following procedure. First, the subject is placed on the inspection apparatus and traveled at a predetermined speed. Next, the vehicle is decelerated from this speed, and the engine speed and the rotational speed of the drive wheel at the time of the deceleration are measured, and the measurement result is plotted on a graph. Here, when the clutch is actually disengaged, it is considered that the gradient of the rotational speed of the drive wheel changes before and after the disengagement. In the conventional inspection, a change in the gradient of the rotational speed is extracted from the plotted graph by visual inspection by an inspector, and only when the engine speed at the time when the change occurs is in the vicinity of a preset cutting speed. Judged to be good.
JP 2003-254871 A

  By the way, the automatic clutch disengagement function operates before the engine speed reaches the idling speed, that is, when the rotational speed of the drive wheels is close to zero. For this reason, the change in the gradient of the rotational speed accompanying the clutch disengagement as described above is actually slight. For this reason, the determination of pass / fail may vary depending on the inspector, and the determination accuracy may be reduced.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle inspection apparatus and inspection method that can accurately inspect the clutch disengagement for a vehicle having an automatic clutch disengagement function. To do.

  An inspection device (for example, an inspection device 1 described later) of a vehicle (for example, a motorcycle as a subject B described later) of the present invention inspects whether the clutch of the vehicle is disconnected or not. The vehicle inspection apparatus includes a rotation speed measurement unit (for example, a tachometer 32, a clamp 321, a tester 31, and a unit relating to execution of step S <b> 2 in FIG. 3) that measures an engine rotation number of the vehicle Speed measuring means (for example, a rotary encoder 35, a tester 31, and a means for executing step S2 in FIG. 3) to measure the rotational speed of the driving wheel of the vehicle, and the speed measuring means at the time of deceleration operation of the vehicle Calculating means (for example, a tester 31 to be described later and means for executing step S2 in FIG. 2), and the deceleration calculated by the calculating means, based on the rotational speed measured by The amount of change in a predetermined change time (for example, a change time M4 to be described later) is set as a deceleration change amount (for example, a change amount of deceleration ΔG to be described later). The engine speed when the amount exceeds a predetermined determination change amount (for example, a determination change amount M5 described later) is within a predetermined determination rotation speed range (for example, a determination rotation speed range [J1, J2] described later). In this case, it is determined that the engine speed is good, and if the engine speed is out of the determination speed range, it is determined that the engine is defective (for example, a tester 31 described later and steps S9 to S11 in FIG. 3). Means).

  According to the present invention, it is determined that the engine speed when the deceleration change amount exceeds the predetermined determination change amount is within the predetermined determination rotation speed range, and the engine rotation speed is determined as the determination rotation. If it is out of the range, it is determined as defective. When the clutch is disengaged during the deceleration operation of the vehicle, the degree of deceleration, that is, the deceleration decreases rapidly. Therefore, it is possible to stably determine the quality of the subject regardless of the inspector by determining the quality based on the engine speed when the deceleration change amount exceeds the predetermined determination change amount. it can.

  The vehicle inspection method of the present invention inspects whether the vehicle clutch is disconnected or not. The vehicle inspection method includes a deceleration operation start step for starting a deceleration operation of the vehicle, a measurement step for measuring a rotation speed of the drive wheel of the vehicle, and a drive wheel based on the rotation speed measured in the measurement step. The calculation step of calculating the deceleration of the vehicle, and the amount of change in the predetermined change time of the deceleration calculated in the calculation step as the deceleration change amount, and when the deceleration change amount exceeds the predetermined determination change amount A determination step of determining that the engine is good when the engine speed is within a predetermined determination speed range, and determining that the engine is defective when the engine speed is outside the predetermined determination speed range. .

  This inspection method is a development of the above-described inspection apparatus as a method invention, and has the same effect as the above-described inspection apparatus.

  According to the inspection apparatus of the present invention, the quality of the subject can be determined stably regardless of the inspector by determining the quality based on the engine speed when the deceleration change amount exceeds the predetermined determination change amount. Can be determined.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a configuration of an inspection apparatus 1 according to the present embodiment.
The inspection apparatus 1 includes a support base 2 on which the subject B is placed, and a measurement apparatus 3 connected to the subject B and the support base 2 to which various signals are input. Check the automatic clutch disengagement function.

  In the present embodiment, a motorcycle is used as the subject B of the inspection apparatus 1. The motorcycle includes an automatic transmission capable of performing a shift operation automatically in accordance with a vehicle speed, an engine speed, and a throttle opening. Further, in this motorcycle, it is possible to switch between two operation modes, D mode and S mode, to which different shift characteristics are imparted, by operating a changeover switch (not shown).

  FIG. 2 is a graph showing the shift characteristics with respect to the vehicle speed and the engine speed. In FIG. 2, the horizontal axis indicates the vehicle speed, and the vertical axis indicates the engine speed. In FIG. 2, the solid line shows an example of the shift characteristic in the D mode, and the broken line shows an example of the shift characteristic in the S mode.

  As shown in FIG. 2, in the D mode and the S mode, a stepless speed change operation is performed with respect to the vehicle speed and the engine speed. The speed change characteristic of the S mode is set so that a higher engine speed is maintained as compared with the D mode. Therefore, in the S mode, it is possible to travel with an emphasis on acceleration performance using a high engine speed. On the other hand, in the D mode, it is possible to travel with an emphasis on fuel consumption using a low engine speed.

  As shown in FIG. 2, the motorcycle has an automatic disconnection function that automatically disconnects the clutch when the engine speed reaches a cutting speed set slightly higher than the idling speed. Thereby, for example, when decelerating from the normal traveling operation state and shifting to the idling operation state, the clutch is automatically disconnected before the engine speed drops to the idling speed.

  Returning to FIG. 1, the support base 2 includes a pair of front wheel support rollers 21 and 22 that support the front wheel F of the subject B, and a pair of rear wheel support rollers 25 and 26 that support the rear wheel R of the subject B. , Including.

  The first front wheel support roller 21 and the second front wheel support roller 22 are provided so as to be rotatable about rotation shafts 21S and 22S provided in parallel with each other. The first front wheel support roller 21 is in contact with the front wheel F from the front, and the second front wheel support roller 22 is in contact with the front wheel F from the rear, thereby supporting the front wheel F of the subject B in a rotatable manner. An electromagnetic brake and a drive motor (not shown) are connected to the first front wheel support roller 21. Thereby, the load applied to the first front wheel support roller 21 can be adjusted, and the first front wheel support roller 21 can be rotationally driven.

  The first rear wheel support roller 25 and the second rear wheel support roller 26 are provided so as to be rotatable about rotation shafts 25S and 26S provided in parallel with each other. The first rear wheel support roller 25 is in contact with the rear wheel R from the front, and the second rear wheel support roller 26 is in contact with the rear wheel R from the rear, thereby supporting the rear wheel R of the subject B in a rotatable manner. An electromagnetic brake and a drive motor (not shown) are connected to the first rear wheel support roller 25. Thereby, the load applied to the first rear wheel support roller 25 can be adjusted, and the first rear wheel support roller 25 can be rotationally driven. The first rear wheel support roller 25 is connected to the first front wheel support roller 21 via a coupling device 29, and rotates in synchronization.

  The measuring device 3 includes a tester 31 including a monitor 311 and an arithmetic device 312, a tachometer 32 and rotary encoders 34 and 35 connected to the tester 31, and an operation instruction panel 36 that displays a message prompting the inspector to operate. , Including.

  The rotary encoder 34 is provided on the first front wheel support roller 21, detects the rotation speed of the rotation shaft 21 </ b> S, and outputs a signal substantially proportional to the detected rotation speed to the tester 31. The rotary encoder 35 is provided on the first rear wheel support roller 25, detects the rotation speed of the rotation shaft 25S, and outputs a signal substantially proportional to the detected rotation speed to the tester 31. In the present embodiment, the vehicle speed indicates the rotational speed of the rear wheel R that is the driving wheel of the subject B, that is, the rotational speed measured based on the detection value of the rotary encoder 35.

  The tachometer 32 detects a plug pulse via a clamp 321 connected to a high-pressure secondary conductor of an ignition plug (not shown), and a signal substantially proportional to the engine speed of the subject B is based on the plug pulse. To 31.

  The arithmetic unit 312 of the tester 31 includes an input circuit to which signals output from the rotary encoders 34 and 35 and the tachometer 32 are input, various signals input through the input circuit, and a flowchart shown in FIG. The computer includes a storage device that stores various programs related to execution, and a CPU that executes operations based on the various programs and various signals. In addition, the calculation device 312 includes an output circuit that outputs various signals for displaying a calculation result as shown in FIG. 4 described later on the monitor 311 and displaying a message described later on the operation instruction panel 36. .

Next, referring to FIG. 3 and FIG. 4, a procedure for inspecting whether or not the clutch is disengaged by the automatic disengagement function of the subject B, that is, whether or not the clutch is appropriately disengaged at the set disengagement speed. explain.
FIG. 3 is a flowchart showing a procedure for clutch disconnection inspection. The inspection procedure shown in this flowchart is realized by the measuring apparatus 3 having the hardware configuration as described above.
FIG. 4 is a diagram showing an example of the vehicle speed and the engine speed measured in the clutch disconnection inspection.

  First, in step S1, a message “D mode setting / cruise driving” is displayed on the operation instruction panel in order to prompt the examiner to operate the subject. Based on this display, the inspector opens the throttle of the subject and cruises the subject under the D mode setting. Here, the cruise operation refers to an operation that travels so that the vehicle speed is maintained at a predetermined cruise speed M1. Here, the cruise speed M1 is set to 60 km / h, for example.

  In step S2, measurement of the engine speed, vehicle speed, and deceleration of the subject is started based on the outputs from the rotary encoder and the tachometer. Here, the deceleration indicates the degree of deceleration and is calculated based on the measured vehicle speed. Specifically, the deceleration is calculated by calculating the acceleration by differentiating the vehicle speed with time and multiplying this by “−1”. Note that the deceleration calculated based on the measured vehicle speed includes a lot of noise. Therefore, in order to ignore this noise, the deceleration calculated as described above is subjected to moving average processing over a predetermined section.

  In step S3, it is determined whether or not the vehicle speed is stable. Specifically, the vehicle speed is stabilized by determining whether or not the measured vehicle speed is included in a range M1 ± M2 centered on the cruise speed M1 over a predetermined cruise stabilization time M3. It is determined whether or not. If this determination is YES, the process proceeds to step S4, and if NO, the process proceeds to step S3. Here, the range width M2 is set to 3 km / h, for example, and the cruise stabilization time M3 is set to 2 seconds, for example.

  In step S4, a message “Throttle fully closed” is displayed on the operation instruction panel to prompt the inspector to operate the subject. Based on this display, the inspector fully closes the subject's throttle and starts the deceleration operation of the subject.

  In step S5, the amount of change in deceleration ΔG is calculated from the calculated deceleration, with the amount of change in deceleration in the predetermined change time M4 as the amount of change in deceleration ΔG. For example, when the clutch is disconnected from the connected state, the deceleration becomes small. Therefore, this deceleration change amount ΔG is a guideline for detecting that the clutch is disengaged. Here, the change time M4 is set to 0.16 sec, for example.

  In step S6, it is determined whether or not the calculated deceleration change amount ΔG is larger than a predetermined determination change amount M5. If this determination is YES, the process proceeds to step S7, and if NO, the process proceeds to step S8. Here, the determination change amount M5 is set to 0.04G, for example.

  In step S7, the engine speed when the deceleration change amount ΔG exceeds the determination change amount M5 is set as the detected cutting speed D1, and the detected cutting speed D1 is updated with the engine speed at the current time.

  In step S8, it is determined whether or not the vehicle is in a free deceleration state, that is, in a state where the vehicle is decelerated with the clutch disengaged. More specifically, it is determined whether or not the state where the deceleration is equal to or lower than a predetermined free deceleration determination value M6 is continued for a predetermined free deceleration determination time M7 or more. If this determination is YES, the process proceeds to step S9, and if NO, the process proceeds to step S5. Here, the free deceleration determination value M6 is set to 0.1 G, for example, and the free deceleration determination time M7 is set to 0.5 sec, for example.

  In step S9, it is determined whether or not the detected cutting rotational speed D1 is within a predetermined determination rotational speed range [J1, J2]. If this determination is YES, it is determined that the subject is good (step S10), and if this determination is NO, it is determined that the subject is defective (step S11). Here, when the cutting rotation speed of the subject clutch is 1600 rpm, the determination rotation speed range [J1, J2] is set to, for example, [1400 rpm, 1800 rpm].

  In the above cutting inspection, when a predetermined inspection upper limit time M9 has elapsed since the start of the inspection, this inspection is forcibly terminated. Here, the inspection upper limit time M9 is set to 30 sec, for example.

  According to the present embodiment, the engine speed when the deceleration change amount ΔG exceeds the predetermined determination change amount M5 is set as the detected cutting speed D1, and the detected cutting speed D1 is within a predetermined determination speed range [J1. , J2], it is determined to be good, and when this detected cutting rotation speed D1 is outside the determination rotation speed range [J1, J2], it is determined to be defective. Here, when the clutch is disengaged during the deceleration operation of the subject B, the degree of deceleration, that is, the deceleration rapidly decreases. Thus, by determining pass / fail based on the engine speed (detected cutting speed D1) when the deceleration change amount ΔG exceeds the determination change amount M5 as described above, the subject can be stably detected regardless of the inspector. Can be judged.

  In the above embodiment, the quality of the subject B is determined while measuring the engine speed and the vehicle speed of the subject B. Thereby, for example, the time required for the inspection can be shortened compared with the case where the time inspection determination for the inspection is performed, compared with the case where the quality determination is performed after the measurement of the engine speed and the vehicle speed. .

  In the present embodiment, the tachometer 32, the clamp 321 and the tester 31 constitute a rotational speed measuring means, the rotary encoder 35 and the tester 31 constitute a speed measuring means, and the tester 31 constitutes an arithmetic means and a judging means. The

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  In the above-described embodiment, the operation of the subject B in the cutting inspection, that is, the throttle operation of the subject B is performed by the inspector based on the display on the operation instruction panel, but is not limited thereto. Such operation of the subject B may be automatically performed by a robot, for example.

It is a figure showing the composition of the inspection device concerning one embodiment of the present invention. It is a figure which shows the speed change characteristic with respect to the vehicle speed and engine speed which concerns on the said embodiment. It is a flowchart which shows the procedure of the cutting | disconnection test | inspection of the clutch which concerns on the said embodiment. It is a figure which shows an example of the vehicle speed and engine speed which were measured in the cutting | disconnection test | inspection of the clutch which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Inspection apparatus 2 ... Support stand 3 ... Measuring apparatus 31 ... Tester (Rotation speed measurement means, speed measurement means, calculation means, determination means)
32 ... Tachometer (rotational speed measuring means)
321 ... Clamp (rotational speed measuring means)
35 ... Rotary encoder (speed measuring means)

Claims (2)

A vehicle inspection device for inspecting whether a vehicle clutch is disconnected or not,
A rotational speed measuring means for measuring an engine rotational speed of the vehicle;
Speed measuring means for measuring the rotational speed of the drive wheels of the vehicle;
Calculating means for calculating deceleration of the drive wheel based on the rotational speed measured by the speed measuring means during the deceleration operation of the vehicle;
The amount of change in the deceleration calculated by the arithmetic means in a predetermined change time is defined as a change in deceleration, and the engine speed when the change in deceleration exceeds a predetermined determination change amount is within a predetermined determination rotation speed range. A vehicle inspection apparatus comprising: a determination unit that determines that the engine speed is good when the engine speed is within the range, and that determines that the engine speed is defective when the engine speed is out of the determination speed range. A vehicle inspection method for inspecting whether a vehicle clutch is disengaged,
A decelerating operation starting step of starting decelerating operation of the vehicle;
A measuring step for measuring the rotational speed of the drive wheels of the vehicle;
A calculation step of calculating the deceleration of the drive wheel based on the rotational speed measured in the measurement step;
The amount of change of the deceleration calculated in the calculation step in the predetermined change time is defined as the change amount of deceleration, and the engine speed when the amount of change in deceleration exceeds the predetermined determination change amount is the predetermined determination rotation speed. And a determination step of determining that the engine is good when the engine speed is within a range, and determining that the engine is defective when the engine speed is outside a predetermined determination speed range.

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