JPS58448A - Two-system type brake hydraulic pressure keeping apparatus - Google Patents

Abstract

PURPOSE:To facilitate the starting on a slope, by pressing down a clutch pedal as well as turning a gear switch on to keep the braking action, and releasing the clutch pedal to release the braking action. CONSTITUTION:The systems of a tandem brake master cylinder 1 are connected through a two-system type hydraulic check valve 4 respectively to wheel cylinders 2, 3. Said check valve 4 can act, by the hydraulic pressure produced in a clutch master cylinder 10 by pressing down the clutch pedal, to prevent an oil from flowing from the wheel cylinder 2, 3 to the brake master cylinder 10. The brake master cylinder 1 and the wheel cylinders 2, 3 are also connected via electromagnetic check valves 9, 9'. Said check valves 9, 9', when either a low gear switch 7 or a back gear switch 8 is ON, can act to prevent the oil from flowing from the wheel cylinders 2, 3 to the brake master cylinder 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that allows an automobile to be easily started on a slope without using a handbrake or packing.

Conventionally, while driving a car, when stopping and then starting on a slope, cars other than automatic cars must use the handbrake, and if the handbrake is not used, it takes a lot of skill to switch from the brake pedal to the accelerator pedal. Even the drivers were getting stuck or stalling.

This invention is a two-system brake hydraulic holding device that is characterized by the fact that when a car is stopped and then started on a slope while driving, it can be started in exactly the same way as when starting on a flat road without using the handbrake. It is.

FIG. 1 shows an example in which a two-system brake hydraulic pressure holding device is piped and wired to a known brake device.

Tampuim brake master cylinder (1), two-system hydraulic check valve (4) that operates with part of the hydraulic pressure generated by tilting the clutch master cylinder, and electrohydraulic check valve r9
Connect the osr and the wheel cylinder (21 (31) as shown in the diagram. Connect the main switch (6) from the battery a1).
) Wire so that current flows through the electromagnetic coil of the electrohydraulic check valve (9M91) when the low gear switch (7) or pack gear switch (8) is on.

To explain how it works, - When you press the clutch pedal to stop temporarily on the road, the hydraulic pressure generated in the clutch master cylinder flows to the release master cylinder αa, but the hydraulic pressure flows through piping A3, and a two-system hydraulic back check is performed. The oil also flows into the oil inlet hole a4 of the valve, causing the piston a5 to move to the left while compressing the spring aO. This is the state shown in Figure 3.

Next, when you step on the brake pedal, the hydraulic pressure generated in the brake master cylinder (1) flows through the pipe α9, and from the oil inlet hole (Io) of the electrohydraulic check valve (9) to the internal steel pole (171). The other hydraulic pressure generated flows through the piping from the oil spill hole to the piping to operate the wheel cylinder (2), and flows through the piping to the electrohydraulic check valve (9).
) to operate the wheel cylinder (3). Next, when the gear is put into low gear, the low gear switch (7) is turned on, and the battery ■ causes the main switch (6) to turn to the low gear switch (7), and current flows through the electromagnetic check valve (9) (9f coil and magnetizes it. Then, as shown in No. 411, one steel pole is pulled to the top and comes into close contact with the gasket, blocking the backflow from the oil spill hole.Therefore, even if you take your foot off the brake pedal, you continue to press the clutch pedal. As long as the oil pressure is maintained, the car remains stationary.

Next, when you release your foot from the tarlatch pedal to start, the piston 19 in the two-system hydraulic check valve returns to the position shown in Figure 2 due to the repulsive force of spring A8, and at the same time the clutch mechanism starts to connect. (c) opens a circuit from oil outflow hole g4 (to) to oil inlet hole (to) 4, so the oil pressure in the wheel cylinders (2) and (3) is from oil outflow hole e4 (to) to the piston. The oil flows through the piping area (to) through the oil inlet holes (A) and (C) to the tamp master cylinder (1).
), the car can easily start without packing.Also, when the clutch pedal is depressed and the low gear is engaged, the electrohydraulic check valve (9) (91 operates first, but the brake oil pressure is at the position shown in Figure 5). Push down the steel pole 11 as shown in Figure 4, and activate the wheel cylinder (2H31) to achieve the purpose. This is because it operates even when

As explained above, this invention has two functions in addition to the conventional brake device.
By incorporating a systematic brake hydraulic holding device, starting on slopes is made easier.

[Brief explanation of drawings]

FIG. 1 shows an example of a two-system brake hydraulic pressure holding device in which a known brake device is piped and wired. FIGS. 2 and 3 are cross-sectional views of a two-system hydraulic check valve. Section 4.5
The figure is a sectional view of an electrohydraulic check valve. Figure 6 shows a device in which a two-system hydraulic check valve can be operated by a wire-type clutch machine.

Claims (1)

[Claims] In the brake piping from the brake master cylinder (1) to the wheel cylinders (2) and (3), there is a two-system hydraulic check valve (4) or (5) that is activated by stepping on the clutch pedal, and a main switch. (6) to the low gear switch (7) or the pack gear switch (8).
) is a two-system brake oil pressure holding device with two systems of piping and wiring for each electrohydraulic check valve (91 (9')) that operates when a person is present.