JPH037250Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle braking device that can automatically maintain braking force under predetermined conditions.

(Prior art) For example, when you want to temporarily stop your vehicle on a slope, or when you frequently have to stop your vehicle in traffic jams, you may want to maintain braking force even if you take your foot off the brake pedal. This is extremely convenient.

Therefore, a vehicle brake device that can automatically maintain braking force under predetermined conditions has been developed. This system has a switching valve that communicates or blocks the piping passage between the master cylinder of the brake system and the brake installed on the wheel, and applies hydraulic pressure to the brake when the brake pedal is depressed. By releasing the pedal force applied to the brake pedal, the switching valve is switched to shut off the piping passage, maintaining the fluid pressure supplied to the brake from the master cylinder, and the braking force is maintained even when the brake pedal is released. It was designed so that

By the way, although such conventional vehicle braking devices are useful for facilitating starting on slopes and preventing creep in automatic transmission vehicles, the braking force is maintained each time the vehicle is stopped. Therefore, the only way to start a stopped vehicle again is to operate the access pedal, which has the disadvantage that it becomes more troublesome to operate the vehicle during traffic jams or when parking in a garage. Ta.

(Purpose of the invention) The present invention is intended to eliminate the above-mentioned drawbacks, and its purpose is to provide a vehicle brake device with good operability that can automatically hold braking force and easily release the holding of this braking force. It's about doing.

(Structure of the invention) In order to achieve the above object, the vehicle brake system of the invention includes a switching valve that communicates or blocks the piping passage between the master cylinder and the wheel brake, and a switching valve that communicates or blocks the piping passage. A vehicle brake device that maintains the hydraulic pressure supplied from the master cylinder to the brake by blocking the piping passage with a valve, the vehicle brake device comprising a manual switch disposed at the driver's seat, and a manual switch operated by the manual switch. , a controller that switches the switching valve to a state where the piping passage is communicated when the switching valve is in a state of blocking the piping passage, and disables switching of the switching valve to a state of blocking the piping passage; and the controller. and an alarm means that warns when switching of the switching valve to a state where the piping passage is blocked is disabled.

Therefore, even without operating the accelerator pedal, by operating the manual switch, the state in which the braking force is held can be released and the state in which the braking force cannot be maintained can be made. Moreover, when the braking force cannot be maintained due to the operation of this manual switch,
An alarm is issued by the alarm means.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In the figure, 1 is the master cylinder of the brake device, and the push rod 2 of this master cylinder 1 is
A brake pedal 3 is provided. Also,
Pipes 5 and 6 are provided between the master cylinder 1 and front and rear brakes provided on the wheels 4 for supplying pressure oil to these brakes. A switching valve 7 is interposed in the piping 5 to communicate or block the passage formed by the piping.

A controller 8 is electrically connected to the switching valve 7. This controller 8 includes a vehicle speed detection signal A from a vehicle speed sensor installed at a predetermined location on the vehicle, an accelerator operation detection signal B from an accelerator switch installed near the access pedal, and a manual switch 10 installed at the driver's seat. On/off signals C and the like are input. The controller 8 is configured to switch the switching valve 7 when these signals satisfy predetermined conditions. The switching valve 7 is normally placed in communication with the piping 5 passage (in a state where the brake pedal is not depressed and automatic retention of the braking force is released). Furthermore, an alarm means 9 is electrically connected to the controller 8 to issue an alarm when the braking force is not automatically maintained. This alarm means consists of a buzzer, a light emitter, etc. In the figure, 11 is a power supply.

Next, the effect will be explained.

In the normal state, when the brake pedal 3 is depressed, hydraulic pressure is supplied from the master cylinder 1 to the front brake, and the vehicle is braked. In this state, the vehicle speed is below a predetermined value (the vehicle has stopped and the vehicle speed is 0).
Including cases where it becomes . When the controller 8 detects that all of these conditions are satisfied: (detected by vehicle speed detection signal A), the accelerator is released (detected by access operation detection signal B), and the manual switch 10 is turned on, the switching valve is activated. 7 is switched from the state shown in the figure. As a result, the passage system of the pipe 5 is cut off, hydraulic pressure is maintained in the front brake, and as a result, the braking force is automatically maintained. Here, when the manual switch 10 is in the OFF state, the switching valve 7 cannot be switched, and instead, the alarm means 9 issues an alarm indicating that the braking force cannot be automatically maintained.

When the braking force is automatically maintained, operating the accelerator pedal or turning off the manual switch 10 switches the switching valve 7 to the original state shown in the figure, thereby reducing the braking force. Automatic retention is canceled. Therefore, the vehicle brake system of the present embodiment releases the braking force from being held by turning off the manual switch 10 without operating the accelerator pedal.
It is possible to make it impossible to maintain braking force.
In other words, the driver can enable or disable the automatic braking force holding function without operating the accelerator pedal, and the braking force holding state can be canceled without necessarily accelerating the vehicle. This has the effect of increasing operability.

Moreover, if the braking force cannot be maintained due to the operation of this manual switch, the alarm means 9 will issue an alarm, so even if the brake pedal 3 is once depressed, when the brake pedal 3 is released, the braking force will be reduced. There is also the effect that the driver of the vehicle can reliably recognize that the state is not maintained and disappears, resulting in safety.

(Effects of the invention) The vehicle brake system of the invention enables the driver to enable or disable the automatic braking force retention function without operating the access pedal, and does not necessarily accelerate the vehicle. Since the braking force holding state can be released without any trouble, it has the effect of increasing operability.

Moreover, when the automatic braking force retention function is disabled, an alarm is issued by the alarm means, so even if the brake pedal is depressed once, if the brake pedal is released, the braking force will not be maintained and will disappear. This also has the effect of ensuring that the driver of the vehicle recognizes the vehicle and is safe.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention, and is a diagram in which an electrical circuit diagram is added to a schematic piping diagram. 1... Master cylinder, 3... Brake pedal, 4... Wheels, 5, 6... Piping, 7... Selector valve, 10... Manual switch.

Claims (1)

[Claims for Utility Model Registration] A switching valve for communicating or blocking the piping passage is interposed between the master cylinder and the brake of the wheel, and the switching valve blocks the piping passage and the master cylinder A vehicle brake device that maintains hydraulic pressure supplied to the brake from a vehicle, comprising: a manual switch disposed at a driver's seat; and a state in which the switching valve shuts off the piping passage when the manual switch is operated. a controller that switches the switching valve to a state where the piping passage is communicated and disables switching of the switching valve to a state where the piping passage is blocked; A vehicle brake device characterized by comprising: an alarm means for warning when switching is disabled.