JPS6113131A - Operation checking method of antiskid valve utilizing brake tester - Google Patents

Abstract

PURPOSE:To enable accurate confirmation and identification of multiple types of vehicles while improving working efficiency, by measuring the frequency of repeating a braking force in a fixed range of an antiskid valve (ASV) within a specified time after the baking force of the ASV reaches a fixed value. CONSTITUTION:The rotational speed of a drive roller in a brake tester is set, for example, at about 25km/h corresponding to vehicle speed and a braking is applied by a car to be diagnosed. Then, after the braking force to front wheels A and B and rear wheels C and D reaches a fixed value, a test starting reference value detection circuit 23 connected to a time setting timer 24 is started to measure the frequency of repeating a braking force in a fixed range of the ASV within a set time with a counter counting circuit 26. Then, a decision circuit 27 checks the repetition frequency upon with the set frequency of a qualified set frequency memory circuit 28 to confirm and identify the operation of the ASV about each of the four wheels and the results of the judgement are shown on a display 17.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is directed to a vehicle having an anti-skid valve.
Concerning a method for confirming the operation of an anti-skid valve used in a brake testing device (E360-1).

GOIM).

``Prior art'' When a vehicle is running and the brakes are applied suddenly, the wheels are knocked down by one, but because the vehicle has inertia, the vehicle continues to move against the road surface, causing slippage between the tires and the road surface. As a result, the thick friction force on the left, right, front, and rear wheels (i.e., the four wheels) becomes unstable, causing the vehicle to skid or roll. You can see it in a beautiful way.

Therefore, recently, efforts have been made to control the actual brake distribution characteristics to get as close to the ideal curve as possible.
Various anti-skid devices have been proposed, and in the field of vehicles, vehicles with anti-skid valves have appeared.Then, the so-called anti-skid valve of the Amp Skid Pal 1 vehicle appeared. There is currently a demand for a method to determine whether the Rad valve is operating as ideal or not. I'1 recognized by l1Tr/No method was proposed by L. 4 "Yes.

1 Problems to be solved by the present invention
1-1 Based on recent demands, I will list them below. 1
``Let's solve the problem.''

■ Measuring the braking force of a vehicle (monkey brake test)
! AI? To be able to check the operation of the amplifier skid valve while using 'i. Therefore, it is possible to save space and measurement time for inspection or measurement, and to improve work efficiency.

(2) It is possible to measure the braking force on all four wheels of the vehicle to be diagnosed, and to confirm the movement of the anti-slip valve while reproducing a state that most closely approximates the actual driving condition f4 of the vehicle. Therefore, correct? Be able to make valid confirmation judgments.

■It is possible to measure many car models while using one brake test device by inputting the judgment values for each car model into the judgment value storage circuit for each car model in advance.

■ Write out the judgment results of the anti-sugirad valve operation so that they can be easily confirmed.

[Means for solving the problems] The present invention is directed to drive of a brake testing device] 111 of [2]-C.
1 After setting the speed to a certain speed range, apply the brakes of the vehicle to be diagnosed, and if the braking force for the front wheels and rear wheels of the vehicle to be diagnosed is a constant value, and if the braking force of the amplifier skid valve is After reaching a certain value, activate the start detection circuit to Des 1 connected to the time setting timer, and within the above set time, set the anti-skid barno's fixed range 1, -11: i L
The number of repetitions of the 1st limit and the lower limit of
It is characterized by iTr l:11.

``Embodiments of the present invention'' 1. The present invention will be described in detail with reference to the drawings and embodiments.

1i J3 in Figure 1 to Figure 3--Example, -+
This is a brake testing device that can measure the braking force of 4J-diagnosed vehicles. 2 is [-tar/i which driving source 3
A long and slender drive roller that is driven to rotate by
As shown in Fig. 1, four sets of this drive [l-ra 2] are installed on the floor or base plate 4 corresponding to the left and right front wheels △, B and the left and right rear wheels C1 of the vehicle to be diagnosed. ). 5 are these brake rollers which are arranged in parallel at a predetermined interval in front of the brake rollers 2, A plurality of long grooves are formed in the brake rollers 5. Reference numeral 6 denotes drive rollers 2 that cover these brake rollers 5, respectively.
A timing bell 1-a that rotates synchronously with the power transmission member.

7 is a lift which is interposed between the drive roller 2 and the brakes 1: I] and C1 and lifts B and C1 [] to each wheel of the vehicle to be diagnosed. 1- Mechanism lift plate. , 8 is a drop-down type safety N-arm which is provided in front of the brake roller 5 and can prevent the vehicle to be diagnosed from jumping out of the play plate 40-ra.

9 is installed on the base plate 4 at the middle part inside the left and right wrist plates.
A] CJ link (with a shallow groove) is attached to the tip of a roller that contacts the inside of the inner wheels △, B, C, and D of the car being pulled and is pressed in a direction perpendicular to the circumferential direction of the middle ring. Yes., 10
is the other base plate/IA fixedly installed on the floor (-)
This is a moving device that can move a wheel base 11, which is installed on the top so that its position can be adjusted, back and forth via a chain 12. It is provided. Is 13 a mobile device? 17. J in 10: A wheel base position detection device that can detect the movement of the rewheel pace 11 when it moves. This wheel base position detection device 13 is located near the end of one side wall of the base plate 4A. 14 is a braking force detector for detecting the braking force of the vehicle to be diagnosed which is applied to the drive source 3, respectively. This is an operation box that is placed at appropriate locations and issues various inspection instructions to workers or diagnosticians.1
6 is a control 211 that controls these operation boxes 15. 17 (Also, there is a display device C that is installed on the floor and displays work instructions to the worker and judgment of the operating state of the amplifier skid valve, which will be described later.
The operation of the anti-skid valve of the vehicle to be diagnosed is confirmed using the brake test equipment 1 having the following configuration. Specifically, the rotational speed of the drive roller 2 of the brake testing device 1 is set within a certain speed range, for example, equivalent to a medium speed.
After moving the vehicle forward and backward, check the -f brake 0 usage of the vehicle being diagnosed.
, full braking of the front wheels Δ, B and rear wheels C, D ■ 4. Considering the operation of the amplifier skid valve as a change in braking force, the upper and lower limits of the range of braking force limited within a certain period of time are After detecting the number of repetitions of , the operation of the valves 1 to 1 is judged by a judgment circuit. One culm or the means to reach the confirmation judgment is as shown in Fig. 2.

However, the 20 measures the braking force as before in the brake testing device 1C, and automatically activates the anti-skid valve when all items such as the front wheel, rear wheel, sum of 4, and difference between the front wheel and rear wheel pass. ! It is a push-button type vehicle type setting device that allows selection of the vehicle to be diagnosed. 21 selects a judgment value for the car type, which is a product name such as Bluebird, Skyline, or Zanny, selected by the car type setting device 20 from each car type judgment value storage circuit 22, and multiplies the judgment value by a specified number (). Judgment to calculate the base value gt
tl (4Yi theoretical circuit) 23 receives an instruction from this judgment reference value oil cylinder circuit 21 for the reference value a (see Fig. 3) of the braking force of the anti-skit valve at which the dest is to be started. 11) When the braking force for the right front wheels A, B and J: and the rear wheels C and D reaches the reference value a, the timer 24 is turned on for a period of 11). 2
;t is a quasi-value detection circuit. 25 receives an instruction from the judgment reference value calculation circuit 21 to determine the lower limit of the bench value suitable for the front wheels A, B and the rear wheels C, D (see FIG. 3). This upper and lower limit detection circuit detects the upper limit b4-3 and the lower limit C of the braking force within a certain range Y of the anti-skid valve within the set time X of the time setting timer. 2G is a counter 11 measuring circuit which is connected to this upper/lower limit detection circuit and measures the number of times the braking force of the anti-skid valve is repeated within the set time x-C within the predetermined range Y. 27 is connected to this counter measurement circuit 2G.
This is a judgment circuit that calculates the number of repetitions of the measured upper and lower limits and compares it with the number of repetitions inputted for each vehicle type in a set number of pass setting number memory circuits 28 to confirm and judge whether the operation of the Annas 1-Tado valve is pass or fail. The determination result of this determination circuit is displayed on the display device 17 as described above. Now suppose that the locus of the braking force of the anti-skid valve of the vehicle to be diagnosed on the brake test equipment drive ['-ra 2 and brake roller 5] is as shown in Figure 3. Upper limit and lower limit C of t- in a certain range Y, i'q'
, Ir1l I(J, ■4.'Ishukuω means 6 times of abutment.

If J is -), in this case if) the specified IRg (H constant number of times is 5 or more - 1), the judgment circuit 27 (if the number of times of 41 cars is detected, then U is included) I make a judgment that.

On the other hand, if the set pass count is 7 or more, the 10F repetition count of 6 does not reach it, so the determination circuit 27 issues a fail determination.

In addition, the judgment of the judgment circuit is shown in Figure 2.
, B and the rear wheels C and D, and the overall judgment is that if the number of the four wheels is 1 or more than the set number of times, it is passed, and if one of them reaches the set number of times or more. Tena []
It is desirable that the judgment circuit 2
7 has a function of overturning the pass/fail judgment for each of the four wheels, and displays the holes and holes of the four wheels on the display device 11.

1. Effects of the Present Invention As is clear from the above description, the present invention provides the following effects.

(1) Anti-skid valve It is possible to check the operation of the anti-skid valve of the vehicle using a brake testing device that can measure the braking force of the vehicle.

Therefore, only the antis 4-rad valve vehicle requires extra equipment or space to specifically measure it!も、Mall
This allows you to automatically check the operation of the anti-skid valve after diagnosing and measuring other items of the vehicle being diagnosed, which saves measurement time. Therefore, it is possible to improve the measurement efficiency of the vehicle to be diagnosed.

(2) It is possible to check whether the operation of the assembly valve is normal or not by adapting it to the actual driving conditions of the vehicle. In one embodiment, a certain Shire 11 test device 1 was used to measure the braking aJ force on the four wheels of the vehicle to be diagnosed. T,
t-i', i・) can be done. Therefore, it is possible to confirm and judge the operation of the amplifier skid pal 1 while reproducing the state that most closely approximates the actual driving condition of the -C1 vehicle.

(3) By adopting the method or means for checking and determining anti-skid valves according to an embodiment of the present invention, it is possible to measure many types of vehicles while using one play 4: test device 1.

(4) Judgment of pass/fail with J in the judgment circuit is 4
In the case of an embodiment in which it is not possible to perform the test on each wheel, it is possible to repeatedly confirm and measure which wheel's braking force is rejected when determining whether the test is rejected.

(5) In the case of an embodiment in which the brake testing device is equipped with a descending type safety roller, the operation of the anti-skid valve can be measured without the vehicle to be diagnosed running off the drive roller or the like during full braking. −

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing one embodiment of the brake testing device used in the present invention, Fig. 2 is a block diagram showing the process of confirming and determining the motion of the undesired valve of the present invention, and Fig. 3 is an explanatory diagram showing the trajectory of the braking force of the anti-skid valve of the vehicle to be diagnosed. 1... Brake test device, 2... Drive roller, A
, B...front wheel, C, D...rear wheel, 4.
4A...Base plate, 5...Brake [21-ra, 8...Safety roller, 10...Movement device, 1
DESCRIPTION OF SYMBOLS 1...Wheel pace, 14...Braking force detector 17...Display device, 20...Vehicle type setting device 21...Determination unit 1 (value calculation circuit), 22...Determination of each vehicle type Value storage circuit, 23...Des(・start% tl' value detection circuit, 24.
... Time setting timer, 25 ... Upper and lower limit detection circuit, 26 ... Counter t1 measurement circuit, 27 ... Judgment circuit, 28 ... Pass setting number memory circuit. 1-r revision applicant: Nissan Motor Sales Co., Ltd.
Patent Attorney Yasudai Miura I
V! J]~1515. ．． /E] Figure 2 Figure 3 = 195-

Claims (1)

[Claims] 1) Applying the brakes of the vehicle to be diagnosed after setting the rotational speed of the drive roller of the brake testing device to a certain speed range,
When the braking force on the front and rear wheels of the vehicle to be diagnosed reaches a certain value, a test start detection circuit connected to a timer is activated, and the number of repetitions of the braking force in a certain range of the anti-skid valve within the set time is Anti-skid valve operation using a brake testing device that includes a judgment circuit process that measures the number of repetitions with a counter measurement circuit and compares this number of repetitions with the number of times set in a pass setting number memory circuit to confirm and judge the operation of the anti-skid valve. Certification method. 2) The rotation speed of the drive roller is 25km/H, which corresponds to the vehicle speed.
A method for checking the operation of an anti-skid valve using the brake testing device according to claim 1, characterized in that: 3) Utilizing the brake testing device according to claim 1, wherein the wheel base having the drive roller corresponding to the rear wheel of the vehicle to be diagnosed is adjustable in position by a moving device. How to check the operation of the anti-skid valve.