JPS60146749A - Hydraulic type car brake gear and inspection thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application The invention provides a method in which the piston of a mask cylinder is loaded with a pre-pressure taken from the pressure of a pressure source by a pedal-operated brake pressure control valve, and further comprises at least one At least one anti-strain P regulating valve between the two mask cylinders and the wheel cylinder is adapted to be actuated to regulate the brake pressure if the associated wheel has a tendency to lock, and is further provided under certain conditions. A valve device is provided below to separate the anti-lock control valve from the mask cylinder and apply a different pressure to the mask cylinder. Contains at least one closed brake circuit with a mask cylinder, of the type that takes place in the event of displacement or in the event of locking 1 - brake pressure control valve if 7
6. This invention relates to a hydraulic vehicle brake system having a brake lock control device and an inspection method thereof.

PRIOR ART 1 According to the valve arrangement of a hydraulic vehicle brake system, which is known from Federal Republic of Italy patent application no. A displacement exceeding the amount causes medium to be supplied into at least one brake circuit. In such a brake system, after the valve device is switched to work, the brake pedal is switched to so-called strokeless braking based on its operating characteristics, and as a result, 12 ino ζ is
This has the advantage that a response can be obtained that the anti-lock control process is carried out. However, in such a brake pedal, for example, when performing strong braking on a slippery road surface with poor ventilation in the circuit, at least one mask cylinder piston is displaced by a larger amount than the valve device originally intended for supply purposes. If you do that, the haze will become hard. During a long period of dry weather, comfortable dry drivers become accustomed to constant strong braking and the resulting hard braking sensation. This may be a hindrance in recognizing brake circuits that are not airtight or lack ventilation.

SUMMARY OF THE INVENTION An object of the present invention is to accurately inform drivers of the state of the brake circuit.

Means for Solving the Problem The means configured to solve the above-mentioned problem is such that the control device of the vehicle brake system can
In the case of an anti-lock control device - no signal, the problem is also that the control of the valve device is not activated, or has already occurred and is designed in such a way that sub-section (2) is returned.

Furthermore, the means of the method taken to solve the above-mentioned problem is control when stopping the normal image and anti-lock control! In the event of a signal failure of the 111 device, the anti-lock control valve is given a master signal to test the brake circuit using the brake pedal instead of a pressure different from the pressure in the mask cylinder supplied under certain conditions. It will supply pressure from the cylinder.

According to the control device for a vehicle brake device according to the present invention, the control of the valve device is not carried out or the control that has already been carried out is carried out even when the vehicle speed is O or when the signal of the anti-lock control device is absent. is returned.

Embodiments The embodiment described in claim 2 results in low technical costs.

According to the embodiment described in claim 3, there is an advantage that the driver only has to concentrate his attention on inspecting the brake circuit after he is freed from concentrating on controlling the brake delay.

The embodiment according to claim 4 is particularly inexpensive.

Embodiment The pressure supply l shown in FIG. 1 has a pressure switch 2 with three different switching stages 2a, 2b, 2c. Reference numeral 3 denotes a known brake power device having two mask cylinders, said two mask cylinders being produced by a brake valve operated via a brake pedal 4 and by this pedal and having a pressure supply. is loaded by the pressure extracted from the pressure of The circuit indicating the starting position of both mask cylinders is designated by I and H, and the circuit indicating the starting position of the mask cylinder from the control room is designated by I11. In short, in circuit (2) the pressure generated by the brake valve is required. A storage container filled with brake fluid is designated by the reference numeral 5.

This reservoir is connected to the cylinder at the starting position of the piston of the mask cylinder and, if the brake valve is not actuated, also to the control chamber. It is indicated via switch 6 when the piston belonging to circuit I is strongly displaced. This switch responds when the pressure in the brake circuit connected to circuit (2) decreases. A signal is generated by the switch 7 if the brake pedal 4 or the piston belonging to the circuit 2 is displaced by a predetermined distance, for example by 50%.

In this case, a double valve 8 is connected to the starting position or to the brake circuits I, H, which double valve is connected to the two 3-port valves 8a, 8b integrated in the circuits I, H and a common actuating magnet 8c. It has become. In the illustrated stop position, the three-port valves 8a, 8b operate the circuit 1. tI is connected to an antilock control valve 9a or 9b, which in this case is designed as a three-position valve. On the other hand, the 3 port valve 8 is operated by the operation magnet.
When operating a and 8b, circuit 2 is connected to anti-lock control valves 9a and 9b. Operation magnet 13cK
Furthermore, a switch 8d is assigned, and this switch gives a signal at the stop position 1(), whereas no starting signal is generated when operating the operating magnet 8C.

Note that the return conduit]0 is shown by a broken line.

The double valve 8 is connected to two independent 3, tP-to 2 position 1
In this case, the two 3-point and 2-position valves are controlled in parallel.

The embodiment according to FIG. 2 differs from the embodiment according to FIG. 1 only in the following respects. In other words, the double valve 8 is incorporated into the anti-lock control valve 1ja, llb,
Moreover, this anti-lock control valve is formed as a 4-point, 4-position, 1-opening valve. Anti-lock system valve 11a,
At the starting position 14 of llb, the brake cylinder is connected to the mask cylinder, and at the second position 14, the circuit I■,
In the third position there is no connection (pressure holding phase) and in the fourth position the brake cylinder is connected to the return conduit 10.

The control surface in the second position thereby corresponds to the control surface of the double valve 8 of the single figure.

The control circuit of the first double valve 8 or of the valve reservoir, which can also be divided, is shown in FIG.

The operating magnet for such a valve is designated by the reference numeral 1 in FIG.
2, and a booster connected upstream of this actuating magnet is designated 13. In the embodiment of FIG. 3, the AND-gate 14 generates the start signal and thereby the bistable member 15 is in its second position and the AND-GATE 16 is not shut off by the shut-off signal. The departure signal of the AND gate 14 is the anti-lock split H
This occurs if a signal controlling the valve 9 is generated at the connection terminal 14a and is simultaneously displayed at the connection terminal 14b by the starting signal of the switch 7. The signal of switch 7 disappears again,
Alternatively, when the pedal reaches its rest position, as shown in FIG. If the signal at the connection terminal 42 connected to the stable member 15 indicates that the vehicle has stopped, the bistable member 1
5 is returned. The stop signal is advantageously generated via means such as an anti-lock control, and this signal is applied to an AND-gate 24, which will be described below.

In the exemplary embodiments described so far, the valve 8 is controlled so that the locking direction immediately takes place and is only returned when the braking process has ended or the vehicle has been stopped. This ensures that during such times the pressure associated with the dead-end operation is connected to the valve 9. Outside of these hours, both heavy brake systems are in a normal state, and therefore the driver can operate the brake circuits I and H via the pedal 4 when the vehicle is stopped.
can feel the state of

Depending on the embodiment, it is also possible to replace the AND gate 14 with an OR gate, so that switching can already be realized earlier.

If the valve 8 is integrated into an anti-lock control valve 11 as shown in FIG. It is determined that a relatively large signal is required to reach the position.

A further circuit section in FIG. 3 serves to prevent or interrupt the control of actuating magnet 12 when certain limit conditions occur. When bistable member 18 is connected using a signal indicating such a condition in the embodiment, AND-gate 16 is shut off and pledge lamp 19 is connected. Advantageously, the bistable part is returned for service only from the outside, for example by a mechanic.

Three cases are shown below in which such a signal can be generated. On the one hand, the level switch 5a reports a lack of brake fluid, or the pressure switch 2
If it reports that the minimum pressure is lowered through stage 2c, the AND gate 20 is connected to the connecting terminal 14 on the - side.
This is the case where the anti-lock control device signal of a is supplied, on the other hand, the signal via the OR gate 21. In this case, no further outflow of brake fluid for brake pressure regulation is permitted.

In the second case, a pressure drop in the circuit is recognized by the amplifier gate 22, which is connected to the switch 6.7, and is then also interrupted. Thirdly, the pedal 4 or the corresponding piston is not sufficiently displaced by the AND-gate 23 with reversed inlet connected to the switch 7 and the switch 8d, so that the starting signal of the switch 7 is also zero. Sai, switch 8
This is the case if the absence of the signal d indicates actuation of the valve 8, in which case a departure signal is generated. This is done without the anti-lock anti-static device signal blocking the AND-gate 24;
16 interruptions are made.

Effects of the Invention The advantage obtained by the present invention is that the P-Leiper can reliably sense the state of the brake circuit under certain conditions, such as when the vehicle is stationary or when the anti-lock control device signal is absent. .

[Brief explanation of the drawing]

FIG. 1 shows a first diagram of a hydraulic vehicle brake system according to the present invention.
FIG. 2 is a circuit diagram showing a second embodiment of the vehicle braking device according to the invention, and FIG. 3 is a control circuit diagram for an additional valve device. 1... Pressure supply section, 2... Pressure switch, 2a.2
b・2 c'...Switching stage, 3...Brake booster, 4...Brake pedal, 5...Storage container, 5
a...Level switch, 6.7...Switch, 8.
...Double valve, 8a/8b...3 port valve, 8C...
Operation magnet, 8d...Switch, 9a119b...
・Anti-lock control valve, 10...Return conduit, 1]・t
ia・llb...Anti-lock control valve, 12...Operation-qf,... 1, □3109 multiplication device, device, 1 device-9
, A, Do r gate, 14a/14b... Connection terminal, 15... Bistable member, 16... AND gate, 17... Connection terminal, 18... Bistable member, 19
...Warning lamp, 20...An1-gate, 21.
...Orgate, 22 ・ 2 3 Conflict 24 ・
... An 1-gate, 39... Inno ζ-ta, 40... OR gate, 41... Switching delay device, 42... Connection terminal (1 other person) FIG, 1 3-2・7゛゛shi-Kikao force setting 4 ・-・7゛′ and one sister-in-law Ogu'freg-・-father's legacy FIG, 2 3,-・7゛shi1 Kika power beakro [4 -7'-RemekiheaIy7mu

Claims (1)

[Claims] 1. A hydraulic vehicle braking device with a brake booster and an anti-lock control device, including at least one closed brake circuit with a mask cylinder, wherein the piston of the mask cylinder is , loaded with a pre-pressure taken from the pressure source by a pedal-operated brake pressure control valve, and at least one anti-lock control valve between the at least one master ring and the wheel cylinder. is operated to adjust the brake pressure when the associated wheel has a tendency to lock, and furthermore, under certain conditions, the anti-lock control wholesale valve is disconnected from the mask cylinder and connected to this master cylinder. A valve arrangement is provided for applying different pressures, and the control of this valve arrangement is of the type which takes place when the master cylinder piston or the brake pedal is displaced by a predetermined amount or when a locking tendency occurs. In a vehicle, the control device (41, 40° 24.16) of the vehicle brake system operates the valve system a (8 ,] la, llb, llc. 11d, 12) A hydraulic vehicle brake circuit characterized in that the control described in 11d, 12) is not performed, or the control that has already been performed is returned to. 2. A bistable member is arranged to control the valve device, and the bistable member is activated by a signal or a lock signal generated when a predetermined displacement is obtained. The control device (41,4
0, 24, 16) are assigned to the anti-lock control system (ABS) that warns when the vehicle is stopped, and this anti-lock control system and the return port of the bistable member (15) are bistable. 2. A hydraulic vehicle brake circuit according to claim 1, which is connected for switching to a first position. 3. The hydraulic vehicle brake circuit according to claim 1 or 2, wherein a switching delay device (41') is provided after the anti-lock control device that warns the vehicle of a stopped state. 4. The hydraulic vehicle brake circuit according to any one of claims 1 to 3, wherein an anti-lock control device that warns of a vehicle stop condition is logically coupled to a wheel rotation speed sensor. . 5. A method for inspecting a hydraulic vehicle brake system with a brake booster and an anti-lock control device, comprising at least one closed brake circuit with a mask cylinder, the piston of the mask cylinder being pedal-operated. The at least one anti-lock control valve between the at least one mask cylinder and the wheel cylinder is loaded with a pre-pressure which is taken from the pressure of the pressure source by a brake pressure control valve that is connected to When the anti-lock control valve is operated to adjust the brake pressure under certain conditions, the anti-lock control valve is disconnected from the master cylinder and a different pressure is applied to this mask cylinder. A type of valve device is provided, and this valve device is controlled when the mask cylinder piston or brake pedal is displaced by a predetermined amount, or when a tendency to lock occurs. Lock control system - In the event of a signal loss, the brake pedal (4) is used to replace the pressure in the mask cylinder that is different from the pressure supplied under certain conditions to the brake r-brake circuit (I, n ) to inspect the anti-lock control valves (9a, 9b, l
A method for testing a hydraulic vehicle brake circuit, characterized in that pressure from a mask cylinder is supplied to (la, 11b).