JP2006312368A5 - - Google Patents

Claims (6)

A hydraulic pressure source for accumulating pressure while maintaining the hydraulic pressure within a predetermined range;
A pressure regulating valve that regulates and outputs the hydraulic pressure accumulated in the hydraulic pressure source to a hydraulic pressure corresponding to a driver's brake operation;
In a vehicle brake device that operates a brake mechanism by the output of the pressure regulating valve,
A stop-related signal detecting means for detecting a signal related to the stop of the vehicle;
Based on the signal detected by the stop related signal detection means, a stop state determination means for determining whether or not the vehicle is in a stop state;
When it is determined by the stop state determination means that the vehicle is in a stop state, the hydraulic pressure of the hydraulic pressure source or the hydraulic pressure output from the pressure regulating valve is reduced to a target pressure set lower than the predetermined range. A vehicle brake device comprising: a hydraulic pressure reduction control unit. The fluid pressure source has a reservoir capable of storing a predetermined amount of fluid, an accumulator for accumulating fluid pressure, and a pump for supplying the fluid in the reservoir to the accumulator,
Accumulator pressure detecting means for detecting the hydraulic pressure accumulated in the accumulator;
A pump operation that drives the pump when the hydraulic pressure detected by the accumulator pressure detecting means is less than or equal to the lower limit value of the predetermined range, and stops the pump when the hydraulic pressure is greater than or equal to the upper limit value of the predetermined range. Control means;
The vehicle brake device according to claim 1, further comprising: a pump operation prohibiting unit that prohibits driving of the pump during the hydraulic pressure decrease control by the hydraulic pressure decrease control unit. The fluid pressure source has a reservoir capable of storing a predetermined amount of fluid, an accumulator for accumulating fluid pressure, and a pump for supplying the fluid in the reservoir to the accumulator,
Accumulator pressure detecting means for detecting the hydraulic pressure accumulated in the accumulator;
A pump operation that drives the pump when the hydraulic pressure detected by the accumulator pressure detecting means is less than or equal to the lower limit value of the predetermined range, and stops the pump when the hydraulic pressure is greater than or equal to the upper limit value of the predetermined range. Control means;
Pressure accumulation range changing means for changing the lower limit value so that the vehicle speed is lower in the low speed state including the stop state than in the high speed state,
2. The vehicle according to claim 1, wherein the target pressure in the hydraulic pressure reduction control unit is set to be lower than a predetermined range in the high speed state and higher than a lower limit value in the stop state. Brake equipment. The fluid pressure source has a reservoir capable of storing a predetermined amount of fluid, an accumulator for accumulating fluid pressure, and a pump for supplying the fluid in the reservoir to the accumulator,
Accumulator pressure detecting means for detecting the hydraulic pressure accumulated in the accumulator;
Output pressure detecting means for detecting the hydraulic pressure output from the pressure regulating valve or the hydraulic pressure in the brake mechanism, and
The hydraulic pressure drop control means includes
A normally closed solenoid valve interposed in a passage connecting the output side of the pressure regulating valve and the reservoir;
A first deviation which is a deviation between the target pressure and the hydraulic pressure detected by the output pressure detecting means, and a second deviation which is a deviation between the target pressure and the hydraulic pressure detected by the accumulator pressure detecting means. With the control amount calculated based on the valve, the normally closed solenoid valve is opened to execute the hydraulic pressure reduction control,
The control amount is determined so that the weight of the first deviation is larger than the weight of the second deviation at the initial stage of the hydraulic pressure reduction control, and the weight of the second deviation is set as the first deviation at the end stage. The vehicle braking device according to claim 1, wherein the vehicle braking device is configured to be determined to be greater than the weight of the vehicle. The fluid pressure source has a reservoir capable of storing a predetermined amount of fluid, an accumulator for accumulating fluid pressure, and a pump for supplying the fluid in the reservoir to the accumulator,
Accumulator pressure detecting means for detecting the hydraulic pressure accumulated in the accumulator;
A pump operation that drives the pump when the hydraulic pressure detected by the accumulator pressure detecting means is less than or equal to the lower limit value of the predetermined range, and stops the pump when the hydraulic pressure is greater than or equal to the upper limit value of the predetermined range. Control means;
The hydraulic pressure decrease prohibiting means for prohibiting execution of the hydraulic pressure decrease control by the hydraulic pressure decrease control means during the driving of the pump by the pump operation control means. Brake device for vehicles. The hydraulic pressure reduction control means reduces the hydraulic pressure of the hydraulic pressure source or the hydraulic pressure output from the pressure regulating valve when it is determined that the output of the pressure regulating valve is equal to or higher than a predetermined hydraulic pressure. The vehicle brake device according to claim 1, wherein the brake device is a vehicle brake device.