JPH041481Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention relates to a device for inspecting the operating state of an acceleration slip control device such as a traction control device.

[Prior Art] Conventionally, the following devices are known as devices for inspecting the operation of an acceleration slip control device mounted on a vehicle.

(1) Actual driving test on the test course As shown in Figure 7, a rug m made of a material with a small friction coefficient, such as a rug made of synthetic resin such as vinyl or a stainless steel plate, is laid on the test course r. The vehicle ca is accelerated at this time, and the operation of the traction control device mounted on the vehicle is checked depending on whether the vehicle ca slips or whether it slips and is swayed sideways.

(2) Mock test using drum tester As shown in Figures 8 and 9, rear wheel drum rd,
Place the vehicle ca on the drum tester dt, which consists of the front wheel drum FD and the power transmission part PT, and then test the vehicle on this drum tester DT.
The operation of the traction control device is tested by driving the CA in a simulated manner and checking whether the wheels slip during sudden acceleration. In addition, the rear wheel drum rotated by the rear wheel RT, which is the drive wheel of the vehicle ca.
The driving force of the rd is transmitted to the front wheel drum FD via the two gearboxes GB of the power transmission section PT, spline section SP, etc.
It is transmitted to the upper front wheel ft.

[Problems that the invention attempts to solve] (1) Actual driving test on a test course or
(2) Although tests such as mock tests using a drum tester can suitably test whether or not acceleration slip control devices such as traction control devices are operating, there are still problems such as the following. Ta. In other words, in an actual driving test on a test course, (1)-a The judgment of whether or not a wheel has slipped is based on the senses of the occupants, so the judgment results may vary and the reliability of the test results may be lacking. (1)-b When synthetic resin mats such as vinyl are used as a material with a low coefficient of friction, the durability of vinyl becomes a problem and maintenance is difficult. (1)-c In order to perform an operation check, the vehicle must be actually run on a test course each time, which results in poor work efficiency. On the other hand, in a mock test using a drum tester, (2)-a a problem caused by the senses of the passenger as in (1)-a above, and (2)-b a drum tester conducting a mock test It is also a device that performs vehicle vibration and noise tests, etc.
The so-called equivalent inertia weight of the rear wheel drum and the front wheel drum is increased (normally, the combined weight of the rear wheel and front wheel drum is 500Kg to 1500Kg). On the other hand, on a slippery road where the friction coefficient of the road surface is small, such as an icy road or a snow-covered road, the equivalent inertial weight of the vehicle becomes extremely small. Therefore, the problem is that the above-mentioned simulation test using the drum tester does not apply to driving on icy roads or snow-covered roads, and (2)-c. The problem is that it is impossible to perform a driving simulation test.(2)-d The rear tires and front tires of the vehicle are mounted on coaxial rear and front drums, respectively, so the traction control device cannot be used. The problem is that it is difficult to judge the operation of each tire individually. Therefore, there has been a desire for further improvement in the device for inspecting the operation of the acceleration slip control device.

Structure of the Invention [Means for Solving the Problems] The operation inspection device for an acceleration slip control device of the present invention is constructed as follows in order to solve the above problems.

The operation inspection device for an acceleration slip control device of the present invention includes: drum rollers on which drive wheels of a vehicle are placed and each of which rotates independently; and a rotation speed that detects the rotation speed of each of the drum rollers driven by the drive wheels of the vehicle. A device for inspecting the operating state of an acceleration slip control device that controls to prevent excessive slip during acceleration, the drive being detected by the rotational speed detection means when the vehicle accelerates. and an operation determining means for determining the operation of the acceleration slip control device based on the increase value of the wheel rotational speed within a predetermined period of time.

Here, the drum rollers are those provided at least in number corresponding to the drive wheels of the vehicle, each drive wheel of the vehicle is placed on it, and each drum roller can rotate independently of the other drum rollers. It may be of any shape or material. For example, one of the drum rollers may be provided with a roller restraint device such as a flywheel in order to inspect the operation of a so-called limited slip differential device as an acceleration slip control device.

The rotational speed detection means is means for detecting the rotational speed of the wheels of the vehicle based on the rotational speed of the drum rollers driven by the drive wheels of the vehicle, and is configured using a so-called rotational speed sensor, such as a rotary encoder. It is possible to do this.

The operation determination means is a means for determining the operation of the acceleration slip control device based on the increase value within a predetermined period of time of the rotational speed of the driving wheels detected by the rotational speed detection means when the vehicle is accelerated. When determining whether the installed traction control device is activated, the traction control device is activated if the vehicle speed increases to a predetermined speed or higher within a predetermined time period when the accelerator pedal of the vehicle is depressed and the vehicle suddenly accelerates. When determining whether the limited slip differential device installed in the vehicle is operating, it is necessary to configure the system to determine whether the left and right drive wheels Various configurations are conceivable, such as a configuration in which it is determined that the limited slip differential device is not operating if the difference in rotational speed between the two exceeds a predetermined value. It is conceivable to configure it as a straightforward circuit or as a logic operation circuit using a microcomputer or the like.

[Operation] The operation inspection device for the acceleration slip control device of the present invention operates as follows.

The operation inspection device for the acceleration slip control device of the present invention detects the rotational speed of each drum roller driven by the driving wheels by the rotational speed detection means when the vehicle is accelerating, and detects the rotational speed of each drum roller driven by the driving wheels as the detected rotational speed of each driving wheel. The operation determining means determines the operation of the acceleration slip control device mounted on the vehicle based on the increase in the rotational speed of each drum roller within a predetermined period of time.

[Embodiment] Next, a preferred embodiment will be described with reference to the drawings in order to further clarify the structure of an operation inspection device for an acceleration slip control device and an anti-skid control device to which the present invention is applied.

FIG. 1 is a block diagram showing the configuration of an operation inspection device (hereinafter simply referred to as an operation inspection device) 1 for an acceleration slip control device and an anti-skid control device according to an embodiment of the present invention, and FIG. The example operation inspection device 1 includes a traction control device (hereinafter simply referred to as a TC device), a limited slip differential device (hereinafter simply referred to as an LSD device), and an anti-skid control device (hereinafter simply referred to as an ESC device). FIG. 2 is an explanatory diagram showing a state in which a rear wheel drive vehicle (hereinafter simply referred to as a vehicle) C equipped with a rear wheel drive vehicle (hereinafter referred to as "vehicle") is inspected, and the operation of each of the above-mentioned devices of vehicle C is inspected.

The operation detection device 1 of this embodiment includes a right front wheel inspection section 3 on which the right front wheel of a vehicle C is placed and rotates the right front wheel, a left front wheel inspection section 4 on which the left front wheel is placed and rotated, and a right rear wheel inspection section 4 on which the right rear wheel is placed and rotated. It is comprised of a wheel inspection section 5, a left rear wheel inspection section 6 on which the left rear wheel is mounted, and the like.

The right front wheel inspection section 3 and the left front wheel inspection section 4 include
Twin rollers 8R, 8L, twin rollers 8R, on which the right front wheel and left front wheel, which are the idle wheels of vehicle C, are placed, respectively.
Drive motors 9R and 9L that rotate 8L, respectively;
Belts 10R and 10 transmit the driving force of the drive motors 9R and 9L to the twin rollers 8R and 8L, respectively.
Pulse encoders 11R and 11L are provided for detecting the rotational speeds of rollers 8RR and 8LR on the rear side of each of the twin rollers 8R and 8L. As a result, the right front wheel and the left front wheel of the vehicle C placed on the twin rollers 8R and 8L are rotated by the drive motors 9R and 9L, respectively, and the rotational speeds of the right front wheel and the left front wheel are A roller 8 that rotates at a speed corresponding to the rotational speed of each front wheel.
Pulse encoder 1 attached to RR, 8LR
It can be detected by counting the number of pulses generated by 1R and 11L.

The right rear wheel inspection section 5 and the left rear wheel inspection section 6 include
Twin rollers 14R, 14L and twin rollers 14R, 1 each carry the right rear wheel and left rear wheel, which are the drive wheels of the vehicle C, and are rotated by the right rear wheel and left rear wheel, respectively.
Pulse encoders 15R, 15L, etc. are provided for detecting the rotational speed of each rear roller 14RR, 14LR of each roller 4L. The roller bearings 17 attached to each of the twin rollers 8R, 8L, 14R, and 14L are as follows:
This is for each roller bearing. Further, the equivalent inertia weight of each of these rollers is approximately 5 to 10 kg.

The pulse encoders 11R, 11 generate a number of pulses proportional to the rotational speed of each wheel of the vehicle C.
L, 15R, and 15L are each connected to a pass/fail determiner 20 as an operation determining means shown in FIG.

The pass/fail determiner 20 includes the pulse encoder 11
Right front wheel speed converter 21 that converts the number of pulses generated by R, 11L, 15R, and 15L into wheel speeds.
R, a left front wheel speed converter 21L, a right rear wheel speed converter 22R, a left rear wheel speed converter 22L, and an ESC device operation determination section 23 that determines the operating state of the ESC device.
It is comprised of a TC device operation determination section 24 that determines the operation state of the TC device, an LSD device operation determination section 25 that determines the operation state of the LSD device, and the like.

The ESC device operation determination unit 23 determines the upper limit speed of each wheel.
Upper and lower limit speed setting circuit 30 that sets Vh ₁ and lower limit speed Vl, right front wheel time measurement circuit 31 that measures the time from upper limit speed Vh ₁ set by upper and lower limit speed setting circuit 30 to lower limit speed Vl
The operating state of the ESC device is determined according to the outputs of R, front left wheel time measurement circuit 31L, right rear wheel time measurement circuit 32R, left rear wheel time measurement circuit 32L, and the outputs of the respective time measurement circuits 31R, L and 32R, L. ESC device operation determination circuit 33, vehicle speed conversion circuit 21R, L
and each vehicle speed detected at 22R, L and each time measurement circuit 31R, L and 32R,
It is comprised of a vehicle speed/braking time display circuit 34 that displays the time measured at L, a pass/fail judgment display circuit 35 that outputs the judgment result of the ESC operation judgment circuit 33, and the like.

The TC device operation determination unit 24 determines the measurement time T ₁ for measuring the wheel speeds of the right rear wheel and the left rear wheel as driving wheels.
The measurement time and upper limit vehicle speed setting circuit 40 for setting the upper limit vehicle speed Vh ₂ , the wheel speeds output from the right rear wheel speed conversion circuit 22R, and the left rear wheel speed conversion circuit 22L are set within the measurement time _T1 . Upper limit vehicle speed
A TC operation determination circuit 41 that determines the operation state of the TC device depending on whether Vh ₂ has been reached, a vehicle speed display circuit 42 that displays the wheel speeds of the left and right rear wheels after the measurement time T ₁ has elapsed, and a TC operation determination circuit 41 The pass/fail judgment display circuit 43 outputs the judgment result.

The LSD device operation determination unit 25 includes a measurement time T ₂ for measuring the wheel speeds of the right rear wheel and left rear wheel, and a measurement time/vehicle speed difference setting circuit ₅₀ for setting the vehicle speed difference V ₀ between the left and right rear wheels. Depends on whether the wheel speed difference between the left and right rear wheels exceeds the set vehicle speed difference V ₀ .
The LSD operation determination circuit 51 determines the operation state of the LSD device, the vehicle speed display circuit 52 displays the maximum value of the wheel speed difference between the left and right rear wheels measured within the measurement time _T2 , and the determination result of the LSD operation determination circuit 51 is displayed. It is composed of an output pass/fail judgment display circuit 53, and the like.

Next, the operation of the operation inspection device 1 of the acceleration slip control device of this embodiment having the above configuration will be described as ()TC
Device operation test, ()LSD device operation test,
(2) Each case of ESC device operation test will be explained.

() TC device operation test, as shown in the inspection diagram in Figure 2, place the right front wheel, left front wheel, right rear wheel, and left rear wheel of vehicle C on each of the twin rollers 8R, 8L, 14R, and 14L. In this state, the accelerator pedal of the vehicle C is depressed without driving the drive motors 9R, 9L. At this time, the wheel speeds V of the left and right driving wheels are displayed on the vehicle speed display circuit 42 of the TC device operation determination section 24 of the pass/fail determiner 20 shown in FIG. TC device operation determination unit 2
The TC operation determination circuit 41 of No. 4 determines a preset measurement time T ₁ from the time when the accelerator pedal is depressed.
The wheel speed V of each of the left and right driving wheels is
exceeds the set upper limit vehicle speed Vh ₂ , vehicle C
It is determined that the TC device installed in the vehicle is not operating. This is due to the following reason.

That is, when the accelerator pedal of vehicle C is depressed, if the TC device is not operating even though the drive wheels on the twin rollers 14R and 14L are slipping, the upper limit vehicle speed Vh ₂ will be reduced within the measurement time T ₁ . This is because it exceeds.

The above judgment result of the TC operation judgment circuit 41 is output to the pass/fail judgment display circuit 43. The graph shown in FIG. 4 shows an example of the above test, and the dashed line graph shows the state when the TC device is not operating.

In this embodiment, the wheel speed V from the time the accelerator pedal is depressed to the measurement time _T1
Although the configuration is such that the operation of the TC device is determined based on a change in the speed, the operation of the TC device may be determined based on a comparison between the time from the predetermined lower limit speed to the upper limit speed and a reference time.

() LSD device operation test When performing an LSD device operation test, a roller restraint device, such as a flywheel, that restrains the rotation of the twin rollers on either one of the twin rollers 14R and 14L on which the driving wheels are mounted, such as a flywheel. Attach. In this state, the accelerator pedal of vehicle C is depressed. At this time, the LSD operation determination circuit 51 of the LSD device operation determination section 25 determines that the difference Vd between the wheel speeds of the left and right driving wheels is set between the time when the accelerator pedal is depressed and the preset measurement time _T2 . If the vehicle speed difference exceeds _V0 , it is determined that the LSD device mounted on vehicle C is not operating. This judgment result of the LSD operation judgment circuit 52 is output to a pass/fail judgment display circuit 53. Also, the maximum value Vmax of the measured wheel speed difference Vd
is displayed on the vehicle speed difference display circuit 52. The graph shown in FIG. 5 shows an example of the above test results, and the dashed line graph shows the state when the LSD device is not operating.

The LSD device operation determination unit 25 determines whether or not the wheel speed difference Vd exceeds a set vehicle speed difference _V0 during a predetermined time period.
The device may be configured to determine operation of the device.

() ESC device operation test. In this case, each twin roller 8R, 8L, 14R, 14L is
With the right front wheel, left front wheel, right rear wheel, and left rear wheel of vehicle C placed on top of the vehicle, the right front wheel and left front wheel of the idler wheels are driven via belts 10R, 10L and twin rollers 8R, 8L, respectively. It is rotated by motors 9R and 9L. On the other hand, the right rear wheel and the left rear wheel of the driving wheels are rotated on the twin rollers 14R and 14L when the driver of the vehicle C depresses the accelerator. The wheel speed V of each of these wheels is
Pulse encoders 11R, 11 attached to each roller 8RR, 8LR, 14RR, 14LR, respectively
L, 15R, and 15L, and displayed on the vehicle speed/braking time display circuit 34 of the pass/fail determiner 20, respectively. When the wheel speed V of each wheel displayed on the vehicle speed/braking time display circuit 34 exceeds the preset upper limit speed Vh ₁ as shown in the graph of FIG. 6, the driver of the vehicle C releases the accelerator pedal. As soon as the inspector removes his/her foot, he/she releases the electromagnetic clutch (not shown).
to separate the drive motors 9R, 9L from the twin rollers 8R, 8L. After the above operation, the driver of vehicle C depresses the brake pedal to brake each wheel. At this time, the wheel speed V of each wheel is decelerated as shown in the graph of Figure 6, but the braking time Tm from the preset upper limit speed Vh ₁ to the lower limit speed Vl is determined by ESC activation. Measured by circuit 33. The ESC operation determination circuit 33 compares this measured braking time Tm with a predetermined reference braking time Ts, and if Ts≦Tm, the ESC device of vehicle C is activated, and if Ts>Tm, it is not activated. The determination result is output to the pass/fail determination display circuit 35. This determination is based on the following reasons. That is, when braking the wheels of vehicle C,
When the wheels become locked, the twin rollers corresponding to the wheels are also suddenly braked together with the wheels to reach the lower limit speed.
This is because the braking time Tm until the vehicle is decelerated to Vl is shorter than the standard braking time Ts.

In addition, the operation of this ESC device is determined by calculating the braking deceleration αm as follows using the measured braking time Tm, and comparing this braking deceleration αm with the standard braking deceleration αs. It's okay to get old.

αm=(Vh-Vl)/(3600×9.8×Tm) αs=(Vh-Vl)/(3600×9.8×Ts) Therefore, when using braking deceleration αm, αs≧
The ESC device is operating when αm is established.

This braking deceleration αm has the advantage that it is not affected by changes in the speed V of each wheel at the start of braking, the upper limit speed Vh ₁ , and the lower limit speed Vl.

Furthermore, in addition to this, it is also possible to determine the area S as shown in the following equation using the upper speed limit Vh ₁ , the lower speed limit Vl, and the braking time Tm, and use this area S to determine the operation of the ESC device.

S=(Vh−Vl)/Tm/2 In this case, since the calculated value to be determined is two-dimensional (area: time Tm×vehicle speed), the determination accuracy can be improved.

In this embodiment, the twin rollers 14R and 14L on which the drive wheels are placed are configured to be rotated by the drive wheels of the vehicle C, but they are rotated by the drive motor similarly to the twin rollers 8R and 8L on which the idle wheels are placed. It may also be configured to do so.

According to the operation inspection device of this embodiment described in detail above, the operation test of each of the TC device, LSD device, and ESC device mounted on the vehicle C can be carried out by each measured value (for example, the above-mentioned This has an excellent effect in that it can be determined as the maximum value Vmax of the difference Vd between the wheel speeds. This also has the effect that each test result is consistent and extremely reliable judgment results can be obtained. In addition, since the equivalent inertial weight of twin rollers 8R, L and 14R, L is reduced (approximately 1/100 of the equivalent inertial weight of conventional rollers), it is possible to obtain test results equivalent to pseudo tests on icy roads and snow-covered roads. This has the advantage that it is possible to perform various inspections on high-speed driving of the vehicle C. Furthermore, since the twin rollers on which each wheel of vehicle C is mounted are configured to rotate independently, it has the effect that the TC device and ESC device can be inspected for each wheel, and the operation of the LSD device can also be inspected. It has also been shown to be effective in allowing inspections to be carried out more efficiently. In addition, since the operation testing device of this embodiment has a simple configuration and can test the operation of each device mounted on a vehicle as many times as desired, the initial cost of the operation test can be reduced. It also has the effect of being able to do so.

Effects of the Invention The device for inspecting the operation of an acceleration slip control device of the present invention has an excellent effect in that the operation inspection of the acceleration slip control device can be determined as a measured value without relying on the inspector's senses. This brings about the effect that the test results are consistent and extremely reliable judgment results can be obtained. In addition, the acceleration slip control device of the present invention can be realized as a simple configuration, and there is no need to actually run the vehicle on a test course each time, which reduces initial costs and reduces work costs. This has the effect of significantly improving efficiency. Furthermore, since the rollers on which the drive wheels are mounted are configured to rotate independently, it is possible to test the operation of the traction control device, etc. for each drive wheel individually, and the equivalent inertia weight of each roller can be determined. It also has the effect of being able to make it smaller. This has the effect that it is possible to conduct a simulation test of a slippery road surface with a low coefficient of friction, such as an icy road or a snow-covered road, and it is also possible to perform a simulation test of a high-speed driving state.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing the configuration of an operation inspection device for an acceleration slip control device according to an embodiment of the present invention;
The figure is an explanatory diagram of an inspection showing how a vehicle is placed on the device and inspected, and FIG. 3 is the pass/fail determiner 20.
Fig. 4 is a graph showing an example of the test results of a traction control device, Fig. 5 is a graph showing an example of test results of a limited slip differential device, and Fig. 6 is a graph showing an example of the test results of a limited slip differential device. A graph showing an example of the test results of the skid slip control device, FIG. 7 is an explanatory diagram showing how the operation of the acceleration slip control device is tested on a conventional test course, and FIGS. 8 and 9 are 1 is a perspective view and a top view showing the structure of a conventionally used drum test. 1...Acceleration slip control device and anti-skid control device operation inspection device, 3...Right front wheel inspection section, 4...Left front wheel inspection section, 5...Right rear wheel inspection section, 6...Left rear wheel inspection Part, 20...pass/fail determination device, 23...ESC device operation determination section, 24...TC
Device operation determination unit, 25... LSD device operation determination unit,
C...vehicle, ca...vehicle, dt...drum tester,
fd...front wheel drum, ft...front wheel, m...rug, pt
...Power transmission section, r...test course, rd...rear wheel drum, rt...rear wheel.

Claims (1)

[Scope of Claim for Utility Model Registration] Drum rollers on which drive wheels of a vehicle are mounted and each of which rotates independently; and rotational speed detection means for detecting the rotational speed of each of the drum rollers driven by the drive wheels of the vehicle; A device for inspecting the operating state of an acceleration slip control device that controls the vehicle to prevent excessive slip during acceleration, the device comprising: a predetermined rotational speed of the drive wheel detected by the rotational speed detection means when the vehicle accelerates; An operation inspection device for an acceleration slip control device, comprising: operation determining means for determining the operation of the acceleration slip control device based on an increase value within a period of time.