JP2656828B2 - Method and apparatus for injecting brake fluid into brake mechanism with ABS - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method and an apparatus for injecting brake fluid, and more particularly to a method for injecting brake fluid into a brake mechanism with an anti-lock brake system installed in a vehicle such as an automobile. A method and an apparatus therefor.

(Related Art) Conventionally, since air remaining in a brake piping system of a vehicle such as an automobile adversely affects a braking function of a brake, it is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 60-35099. A brake fluid injection device having a brake gun for injecting brake fluid into a brake piping system and a vacuum means for vacuuming the brake piping system before the brake fluid is injected by the brake gun is known. Have been. The procedure for injecting the brake fluid into the brake piping system by the brake fluid injection device is as follows. First, the brake piping system is evacuated by the vacuum evacuation means to suction and deaerate the air in the piping system. The liquid is injected under pressure.

Also, in addition to the method of injecting brake fluid by the above-described brake fluid injection device, for example, as disclosed in JP-A-62-16393, a state in which the pressurization of the brake fluid filled in the brake piping system is released. By performing the pumping operation, the air in the wheel cylinder contracted by the pumping of the brake fluid is expanded so that the air is easily released from the inner wall of the wheel cylinder. There is also known a method for improving the workability of injection into a piping system.

(Problems to be Solved by the Invention) In recent years, in vehicles such as automobiles, braking force is controlled so that wheels do not lock and slip when braking suddenly or on slippery roads such as snowy roads. A brake mechanism with an anti-lock brake system that ensures running stability has been put to practical use. However,
The brake pipe system of the brake mechanism with the anti-lock brake system has a main brake pipe system that transmits the pressure of the master cylinder to the wheel cylinder, and a sub brake pipe that controls the pressure of the main brake pipe system so that the wheels do not lock during braking. System, which is more complicated than the brake piping system of a normal brake mechanism, and a valve is interposed between the main brake piping system and the auxiliary brake piping system. As described above, even if the air in the brake piping system is sucked and deaerated, there is a problem that the air easily remains in the main brake piping system.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to provide a method for evacuating the main brake piping system prior to injecting brake fluid into a brake mechanism with an anti-lock brake system. By vibrating the piping system, it is possible to reliably discharge air remaining in the main brake piping system. Moreover,
An object of the present invention is to simply provide a brake fluid injection device capable of reliably discharging residual air in a main brake piping system.

(Means for Solving the Problems) In order to achieve the above object, a solution for the invention according to claim 1 includes a main brake pipe system for transmitting pressure in a master cylinder to a wheel cylinder, and a main brake pipe system. The brake fluid is supplied to a brake mechanism with an anti-lock brake system including a sub-brake piping system for controlling the pressure so that the wheels are not locked during braking, and a motor for driving pump means provided in the sub-brake piping system. In the method of injecting, the main brake piping system is evacuated before the brake fluid injection, and then the brake fluid is injected into the main brake piping system. When driven, vibration is given to the main brake piping system.

A second aspect of the present invention provides a main brake pipe system for transmitting pressure in a master cylinder to a wheel cylinder, and a sub brake pipe system for controlling pressure of the main brake pipe system so that wheels are not locked during braking. System for injecting brake fluid into a brake mechanism with an anti-lock brake system, comprising a system and a motor for driving a pump means provided in the auxiliary brake piping system, wherein the brake fluid is injected into the main brake piping system. A brake gun to be injected, vacuum means for evacuating the main brake piping system before the brake fluid is injected by the brake gun; And a motor drive commanding means for driving the motor.

(Operation) With the above configuration, in the method according to the first aspect of the present invention, when the main brake piping system is evacuated before the brake fluid is injected into the brake mechanism with the antilock brake system, the motor is driven. Vibration is applied to the main brake piping system, and in particular, the valve between the main brake piping system and the auxiliary brake piping system is vibrated, so that the residual air in the main brake piping system is released and reliably discharged. Will be done.

According to the second aspect of the present invention, the operation signal of the evacuation means is transmitted to the motor drive command means, and the motor drive command means receiving the operation signal drives the motor to apply vibration to the main brake piping system. Therefore, it is only necessary to provide the above-mentioned motor drive command means, and it is not necessary to make a major modification of the device. Therefore, a brake fluid injection device capable of reliably discharging the residual air in the main brake piping system is provided simply. The Rukoto.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an anti-lock brake system (hereinafter referred to as ABS) equipped on a four-wheel steering vehicle to which brake fluid is injected.
1 schematically illustrates a brake injection system of a brake mechanism 1 with a brake mechanism. This ABS-equipped brake mechanism 1
Referring to FIG. 3 and FIG. 3, reference numeral 2 denotes a brake pedal, 3 denotes a master cylinder for converting the depressing force of the brake pedal 2 into a hydraulic pressure corresponding to the depressing force, 4a, 4b, 4c and
4d is a wheel cylinder for applying a braking force to the front, rear, left and right wheels. As shown in FIG. 1, the master cylinder 3 and the wheel cylinders 4a, 4b, 4c and 4d are connected to the hydraulic pressure passages 5a, 5b, 5c and 5d (second The hydraulic pressure passages 5a, 5b, 5c and 5d control the hydraulic pressure applied to the wheel cylinders 4a, 4b, 4c and 4d, respectively, and are surrounded by solid lines. An auxiliary brake piping system 6b is provided, and the hydraulic unit 6 is constituted by the main brake piping system 6a and the auxiliary brake piping system 6b.

The hydraulic unit 6 includes three solenoid valves 7, 7, 7, four expander pistons 8, 8,..., A pump 10 and a pump 10
, An accumulator 11, pressure switches 12 and 12, and a cut-off valve 13 provided for each of the expander pistons 8 are interposed. Ning valve
14 and 14 are provided, and these are connected to the reserve tank 15 through hydraulic pressure passages 16a to 16g and 5a to 5d, and their operation is controlled by an electric unit 17. 18a, 18b, 18c and 18d are ABS sensors for detecting the rotational speeds of the front, rear, left and right wheels, respectively, and the detection signals of these ABS sensors 18a, 18b, 18c and 18d are input to the electric unit 17. .
Each of the solenoid valves 7 includes an exhaust-side solenoid valve 7a and an inlet-side solenoid valve 7b. Also, the above cut-off valve
13 includes two valves, a first cut-off valve 13a and a second cut-off valve 13b, as shown in enlarged detail in FIGS. 7 (a) to 7 (d).

In the brake mechanism 1 with the ABS configured as described above, first, the detection signal of the wheel speed detected by each of the ABS sensors 18a, 18b, 18c and 18d is input to the electric unit 17, and the wheel condition is grasped here. Together with predicting wheel conditions based on predetermined theoretical values. Then, by outputting the predicted value to the hydraulic unit 6, the motor 9 and each solenoid valve 7 in the hydraulic unit 6 are turned ON / OFF, and the pump 10, each expander piston 8, the cutoff valve 13, etc. By controlling the hydraulic pressure applied to the wheel cylinder 4a, the wheels are not locked.

Here, the role of the expander piston 8 and the cut-off valve 13 will be described. The expander piston 8 moves in the working chamber 21 by accumulator pressure controlled by the exhaust side and inlet side solenoid valves 7a, 7b. The wheel cylinder pressure is increased or decreased or held by a change in volume in the working chamber 21. Further, the first cutoff valve 13a is connected to the hydraulic pressure passages 5a to 5d on the master cylinder 3 side and the wheel cylinders 4a to 4d side by an expander piston 8 which is moved by accumulator pressure controlled by the exhaust side and inlet side solenoid valves 7a and 7b. For opening and closing the hydraulic passages 22a to 22d. Further, the second cut-off valve 13b is operated by the accumulator pressure so that the hydraulic pressure passages 5a-5d on the master cylinder 3 side and the hydraulic pressure passages 22a-2d of the wheel cylinders 4a-4d.
It opens and closes 2d. Incidentally, the relationship between the movement of the expander piston 8 and the cut-off valve 13 is shown in FIG.
7 (a) to (d), FIG. 7 (a) shows the ABS inactive state, FIG. 7 (b) shows the wheel cylinder pressure reduced, and FIG. 7 (c) shows the wheel cylinder pressure increased. FIG. 7 (d) shows that the wheel cylinder pressure is being held.

Next, a brake fluid injection device 30 for injecting brake fluid into the brake mechanism 1 with the antilock brake system will be described with reference to FIGS. 1, 5, and 6. FIG.

The brake fluid injection device 30 includes a brake gun 31 that injects brake fluid into the main brake piping system 6a of the brake piping system.
The brake gun 31 guides a supply hose 19 attached to the brake gun 31 to a cable carrier 20 horizontally arranged at a predetermined height above the floor surface, so that a brake fluid supply port of the master cylinder 3 of the automobile M is provided. It is made to be inserted in.

Further, a vacuum pump 32 as a vacuum evacuation means is connected to the brake gun 31 via a vacuum evacuation line 33, and a first solenoid valve 34 and a second solenoid valve 35 are connected to the evacuation line 33. In addition, a pressure gauge 36 is connected to the vacuum line 33 by a first branch pipe 33a. In addition, a compression pump 37 is connected to the second branch pipe 33 in the vacuum line 33.
b, a third solenoid valve 38 is interposed in the second branch pipe 33b, and a fourth solenoid valve 39 is connected to the second branch pipe 33b by a third branch pipe 33c. Before the brake fluid is injected by the brake gun 31, the first and second solenoid valves are used.
With the 34, 35 demagnetized and opened, the third solenoid valve 38 demagnetized and closed, and the fourth solenoid valve 39 energized and closed, the vacuum pump 32 operates The inside of the main brake piping system 6a of the brake piping system is evacuated.

Further, a brake fluid supply pump 40 is connected to the brake gun 31 via a brake fluid supply pipe 41, and two brake fluid tanks 42, 42 are connected to an upstream end of the brake fluid supply pipe 41. On the other hand, a fifth solenoid valve 43 is provided on the downstream end side. Then, in a state where the fifth solenoid valve 43 is demagnetized and opened, the brake gun 31 is operated by the operation of the brake fluid supply pump 40.
The brake fluid is supplied to the main brake pipe system 6a by operating the brake gun 31.

A brake fluid recovery pump 44 is connected to the brake gun 31 via a brake fluid recovery pipeline 45, and a recovery vessel 46 for recovering brake fluid is connected to the brake fluid recovery pipeline 45.
And a sixth solenoid valve 47 is provided. The upstream side of the brake fluid recovery pipe 45 is connected to the brake fluid tanks 42 and 42, and the brake fluid recovered in the recovery container 46 is to be reused by the operation of the brake fluid recovery pump 44. The brake fluid is supplied to the brake fluid tanks 42, 42. Then, while the second solenoid valve 35 is demagnetized and opened, the third solenoid valve 38 is also excited and opened, and the sixth solenoid valve 47 is excited and opened. By the operation of the compression pump 37 and the brake fluid recovery pump 44, excess brake fluid is discharged from the main brake piping system 6a and collected in the recovery container 46.

Further, a motor drive command device 48 as a motor drive command means is connected to the vacuum pump 32, and the motor drive command device 48 receives an operation signal of the vacuum pump 32,
The motor 9 is driven to apply vibration to the main brake piping system 6a during evacuation.

Next, a procedure for injecting the brake fluid into the brake mechanism with ABS 1 by the brake fluid injecting device 30 configured as described above will be described with reference to the flowchart of FIG.

First, in step S _1, as shown in FIG. 5 and FIG. 6, when the motor vehicle M comes loaded into the brake fluid injection station B, the supply hose 19 to the brake guns 31 is attached, the cable bearer 20 It is guided to move in the automobile M side, in step S _2, attaching the brake gun 31 to the brake fluid supply port of the master cylinder 3 of a motor vehicle M.

Then, in step S _3, evacuating the main brake piping system in 6a by operating the vacuum pump 32. At this time, the first and second solenoid valves 34 and 35 are opened by demagnetization, the third solenoid valve 38 is closed by demagnetization, the fourth solenoid valve 39 is closed by excitation, and the fifth solenoid The valve 43 is in a closed operation state by excitation, and the sixth solenoid valve 47 is in a closed operation state by demagnetization.

Thereafter, in step S _4, by outputting a drive command signal of the motor drive command unit 48 which receives the actuation signals of the vacuum pump 32 to the motor 9 to drive the motor 9, thereby the main brake piping system 6a Give vibration. Also,
By driving the motor 9 as described above, the expander piston 8 and the cutoff valve 13 are brought into the state shown in FIG. 7 (a), whereby the hydraulic pressure passage on the master cylinder 3 side
Hydraulic passages 22a to 22d on the side of 5a to 5d and wheel cylinders 4a to 4d
Are opened to communicate with each other, and the two hydraulic passages 5a to 5d, 22a to 22
d can be evacuated. At this time, as shown in FIG. 8, the hydraulic pressure passages 22a to 22d on the wheel cylinders 4a to 4c side are used.
Alternatively, a liquid L such as water or oil
Is present, the hydraulic passages 22a to 22d are thin, and particularly, the passage of the cut-off valve 13 is extremely narrow, so that the suction between the wheel cylinders 4a to 4d side and the cut-off valve 13 is not enough. Although it is assumed that the operation is not performed, the liquid pressure passages 22a to 22d and the cutoff valve 13 are opened by removing the liquid L by the vibration caused by the driving of the motor 9 as described above.

Thereafter, at step S _5, after the first solenoid valve 34 is excited to cut off the vacuum引管path 33 by closing operation was stopped intake from the main brake piping system 6a,
A leak check is performed by checking with the pressure gauge 36 whether or not this suction has been sufficiently performed.

Then, in step S _6, when stopping the operation of the vacuum pump 32, operation of the motor 9 is stopped output of the drive command signal of the motor drive command unit 48 is stopped.

Thereafter, at step S _7, it causes the opening operation to demagnetize the fifth solenoid valve 43, the second solenoid valve 35
After the motor is closed and actuated, the brake fluid is supplied to the brake gun 31 by operating the brake fluid supply pump 40, and the brake fluid is supplied into the main brake piping system 6a by operating the brake gun 31. I do.

Thereafter, in step S _8, the said brake fluid supplied in a predetermined amount, then closing operation by energizing the fifth solenoid valve 43 stops the operation of the brake fluid supply pump 40, and the second solenoid valve 35 is demagnetized and opened, and the third and sixth solenoid valves 3
After the magnets 8 and 47 are both excited and opened, the compression pump 37 and the brake fluid recovery pump 44 are operated to discharge the excess brake fluid from the main brake piping system 6a and recover it in the recovery container 46.

Thereafter, in step S _9, by closing operation by demagnetize the third solenoid valve 38 stops the operation of the compression pump 37, to stop the supply of compressed air, and demagnetize the sixth solenoid valve 47 After stopping the discharge of the brake fluid, the fourth solenoid valve 39 is demagnetized and opened to operate the master cylinder 3.
After releasing the inside to the atmosphere, the brake gun 31 is removed from the brake fluid supply port of the master cylinder 3 to complete the injection of the brake fluid.

As described above, in the brake fluid injection method according to the present embodiment, when the main brake piping system 6a is evacuated before the brake fluid is injected into the brake mechanism 1 with ABS,
Since the motor 9 is driven, the vibration accompanying the driving of the motor 9 is transmitted to each cutoff valve 13 interposed between the main brake piping system 6a and the auxiliary brake piping system 6b of the brake piping system. Each of the cutoff valves 13 vibrates, thereby releasing the remaining air in the main brake piping system 6a and reliably sucking and discharging the air from the main brake piping system 6a.

In the brake fluid injection device 30 according to the above embodiment,
Motor drive command device 48 receiving the operation signal of vacuum pump 32
As a result, since the motor 9 is driven to apply vibration to the main brake piping system 6a, only the motor drive command device 48 need be provided, and it is not necessary to make a major modification of the device. The brake fluid injection device 30 that can reliably discharge the residual air in the piping system 6a can be easily provided.

(Effects of the Invention) As described above, according to the first aspect of the present invention, the main brake piping system is vibrated by driving the motor at the time of evacuation, so that the remaining air from the main brake piping system can be reliably removed. Can be sucked and discharged.

According to the second aspect of the present invention, the motor is driven by the drive command signal of the motor drive command means which is issued based on the operation of the vacuum evacuation means. Can easily provide a brake fluid injection device capable of reliably discharging the remaining air.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a schematic structural view of a brake fluid injection system of a typical anti-lock brake system mechanism according to the present invention, and FIG. 2 is an anti-lock mounted on a four-wheel steering vehicle. FIG. 3 is a schematic configuration diagram of a brake mechanism with a brake system, FIG. 3 is a schematic configuration diagram showing a state where the brake mechanism in FIG. 2 is mounted on an automobile, FIG. 4 is a flowchart diagram showing a procedure for injecting a brake fluid, and FIG. 6 is a schematic diagram of a brake fluid supply station, FIG. 6 is a schematic configuration diagram of FIG. 5, FIGS. 7 (a) to 7 (d) are operation diagrams showing the operation of an expander piston and a cutoff valve, and FIG. FIG. 3 is a diagram showing a state in which a liquid exists in a hydraulic passage of a main brake piping system. 1 Brake mechanism with anti-lock brake system (ABS) 6a Main brake piping 6b Sub brake piping 9 Motor 10 Pump 30 Brake fluid injection device 31 Brake gun 32 Vacuum pump (vacuum evacuation means) 48 …… Motor drive command device (motor drive command means) M …… Car

Claims (2)

(57) [Claims] 1. A main brake piping system for transmitting pressure in a master cylinder to a wheel cylinder, a sub-brake piping system for controlling pressure of the main brake piping system so that wheels are not locked during braking, and a sub-brake piping system. In a method of injecting brake fluid into a brake mechanism with an anti-lock brake system having a motor that drives a pump means provided in, the main brake piping system is evacuated before the brake fluid injection, and then For injecting a brake fluid into the main brake piping system, and applying a vibration to the main brake piping system by driving the motor at the time of evacuation. Brake fluid injection method. 2. A main brake pipe system for transmitting pressure in a master cylinder to a wheel cylinder, a sub brake pipe system for controlling the pressure of the main brake pipe system so that wheels are not locked during braking, and a sub brake pipe system. An apparatus for injecting brake fluid into a brake mechanism having an anti-lock brake system provided with a motor for driving a pump means provided in a brake gun for injecting brake fluid into the main brake piping system; Prior to the injection of the brake fluid by the gun, a vacuum means for evacuating the inside of the main brake pipe system, and an operation signal of the vacuum means is received, and the motor is driven to apply vibration to the main brake pipe system. A brake fluid injection device for a brake mechanism with an ABS, comprising: a motor drive command unit.