Back to results
US 2002/0163247 A1Published application
Brake control apparatus for vehicle
OwnerShuichi Yonemura, Yoichi Abe +1inventors
InventorsShuichi Yonemura, Yoichi Abe, Mamoru Sawada
Life of this patent
Estimating the term…
Abstract
A characteristic changing device is adopted in the inventive brake control system for the vehicle. The characteristic changing device sets a differential pressure between a first brake hydraulic pressure which is applied to wheel cylinders and a second brake hydraulic pressure which is generated by a master cylinder so that the first brake hydraulic pressure is higher than the second hydraulic pressure when the second brake hydraulic pressure is reduced. Due to the differential pressure set as described above, the first brake hydraulic pressure enough to exhibit effective braking force is kept even if the second brake hydraulic pressure is reduced.
Claims30
A brake control apparatus for a vehicle, comprising:
- a brake hydraulic pressure generating device having a hydraulic pressure generating source for generating brake hydraulic pressure;
- a braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the brake hydraulic pressure generating device;
- a conduit which connects the brake hydraulic pressure generating device with the braking force generation member;
- and
- characteristic changing means disposed in the conduit, which differentiates a characteristic of pressure-reduction of the hydraulic pressure generating device from that of the brake hydraulic pressure applied to the braking force generation member by setting a differential pressure such that a first brake hydraulic pressure on a side of the braking force generation member is higher than a second brake hydraulic pressure on a side of the brake hydraulic pressure generating device when the brake hydraulic pressure generated by the brake hydraulic pressure generating device drops.
2 more elements
A brake control apparatus for a vehicle, comprising:
- a brake hydraulic pressure generating device having a hydraulic pressure generating source for generating brake hydraulic pressure;
- a braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the brake hydraulic pressure generating device;
- a conduit which connects the brake hydraulic pressure generating device with the braking force generation member;
- characteristic changing means disposed in the conduit, which increases the brake hydraulic pressure applied to the braking force generation member in conformity with increase of the brake hydraulic pressure generated by the brake hydraulic pressure generating device and which differentiates a change in reduction of the brake hydraulic pressure generated by the brake hydraulic pressure generating device from that of the brake hydraulic pressure applied to the braking force generation member when the brake hydraulic pressure generated by the brake hydraulic pressure generating device drops.
1 more element
A brake control apparatus for a vehicle, comprising:
- a braking force generation member for providing braking force to wheels of the vehicle in response to a command coming from the outside;
- and
- characteristics changing means for change characteristics of the braking force provided to the wheel by the braking force generation member so that reduction of the braking force is executed with a delayed response than increase of the braking force in response to the command which orders to reduce/increase the braking force.
A brake control apparatus for a vehicle, comprising:
- an operating member to cause brake hydraulic pressure to generate;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for lessening variations of reduction of the brake hydraulic pressure applied to the wheel braking force generation member with respect to variations of the operating member when the operating member is operated so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for lessening a gradient of reduction of the brake hydraulic pressure applied to the wheel braking force generation member during a predetermined time from a start of the reduction of the brake hydraulic pressure applied to the wheel braking force generation member than that after the predetermined time when the operating member is operated so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for keeping the brake hydraulic pressure applied to the braking force generation member substantially during a predetermined period of time when the operating member is operated so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for executing reduction of brake hydraulic pressure applied to the wheel braking force generation member with a delay of time when the operating member is operated so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source compared to increase of the brake hydraulic pressure applied to the wheel braking force generation member when the operating member is operated so as to increase the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate based on an operation of a driver;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force for wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for executing reduction of the brake hydraulic pressure applied to the wheel braking force generation member with a first gradient of pressure-reduction in an initial stage of an operation of the operating member to reduce the brake hydraulic pressure and for executing reduction of the brake hydraulic pressure applied to the wheel braking force generation member with a second gradient of pressure-reduction which is greater than the first gradient of pressure-reduction after the initial stage of the operation of the operation member to reduce the brake hydraulic pressure when the driver operates the operating member so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate based on an operation of a driver;
- a hydraulic pressure generating source for generating the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the hydraulic pressure generating source;
- a conduit which connects the hydraulic pressure generating source with the wheel braking force generation member;
- and
- characteristic changing means for keeping the brake hydraulic pressure applied to the wheel braking force generation member at a pressure of more than a predetermined value when the driver operates the operating member so as to reduce the brake hydraulic pressure in the hydraulic pressure generating source.
3 more elements
A brake control apparatus for a vehicle, comprising:
- an operating member for causing brake hydraulic pressure to generate based on an operation of a driver;
- a brake hydraulic pressure generating device which generates the brake hydraulic pressure in response to an operation of the operating member;
- a wheel braking force generation member for providing braking force to wheels of the vehicle by receiving the brake hydraulic pressure from the brake hydraulic pressure generating device;
- a conduit which connects the brake hydraulic pressure generating device with the wheel braking force generation member;
- and
- increasing means for increasing the brake hydraulic pressure applied to the wheel braking force generation member when the driver operates the operating member so as to reduce the brake hydraulic pressure in the brake hydraulic pressure generating device.
3 more elements
Dependencies are inferred from the claim text.