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US 8,297,715 B2Granted
Braking system
AssigneeHonda Motor Co., Ltd.
InventorsYutaka Nishikawa, Kazuya Takenouchi, Takehiko Nanri, Masaie Kato, Yoko Uno, Shinji Takayanagi, Hiroshi Ishihara
Life of this patent
Estimating the term…
Abstract
A braking system includes first pressure sensors 35, 35 which are provided to braking pipes 41, 41 which constitute first input-side pressure sensors for detecting a liquid pressure on a front-wheel-master-cylinder-25 side and a rear-wheel-master-cylinder-82 side, and second pressure sensors 36, 36 which are provided at positions closer to a stroke-simulator-28 side than second solenoid-operated valves 31, 31 of braking pipes 27,27 which constitute second input-side pressure sensors for detecting a liquid pressure on the stroke-simulator-28 side.
Claims13
A braking system comprising:
- a master cylinder interlockingly operated with an operation of a braking operation part;
- wheel braking means which generates a braking force by a first liquid pressure obtained by operating the master cylinder;
- a main braking passage connecting the master cylinder and the wheel braking means;
- a normally-open first solenoid-operated open/close valve provided to the main braking passage for establishing or interrupting communication between the master cylinder and the wheel braking means;
- a stroke simulator which applies a pseudo reaction force corresponding to a control variable of the braking operation part to the master cylinder;
- a branch passage branched from the first solenoid-operated open/close valve of the main braking passage and connected to the stroke simulator;
- a normally-closed second solenoid-operated open/close valve provided to the branch passage for establishing or interrupting communication between the master cylinder and the stroke simulator;
- a hydraulic modulator which generates a second liquid pressure by an electrically-operated actuator and operates the wheel braking means with the second liquid pressure;
- a first input-side pressure sensor provided to the main braking passage for detecting a liquid pressure on the master cylinder;
- and
- a second input-side pressure sensor provided at a position that has a liquid passage closer to the stroke simulator than to the second solenoid-operated open/close valve of the branch passage for detecting a liquid pressure on the stroke simulator,
- wherein a measurement resolution of the second input-side pressure sensor is set higher than a measurement resolution of the first input-side pressure sensor.
9 more elements
A braking system of a vehicle, comprising:
- a master cylinder interlockingly operated with an operation of a braking operation part;
- wheel braking device configured to generate a braking force by a first liquid pressure obtained by operating the master cylinder;
- a main braking passage connecting the master cylinder and the wheel braking device;
- a normally-open first solenoid-operated open/close valve provided to the main braking passage for establishing or interrupting communication between the master cylinder and the wheel braking device;
- a stroke simulator which applies a pseudo reaction force corresponding to a control variable of the braking operation part to the master cylinder;
- a branch passage branched from the first solenoid-operated open/close valve of the main braking passage and connected to the stroke simulator;
- a normally-closed second solenoid-operated open/close valve provided to the branch passage for establishing or interrupting communication between the master cylinder and the stroke simulator;
- a hydraulic modulator which generates a second liquid pressure by an electrically-operated actuator and operates the wheel braking device with the second liquid pressure;
- a first input-side pressure sensor provided to the main braking passage for detecting a liquid pressure on the master cylinder;
- and
- a second input-side pressure sensor provided to the branch passage for detecting a liquid pressure on the stroke simulator, wherein a change of the liquid pressure on the stroke simulator is detectable by the second input-side pressure sensor only when the normally-closed second solenoid-operated open/close valve is opened,
- wherein a measurement resolution of the second input-side pressure sensor is set higher than a measurement resolution of the first input-side pressure sensor.
9 more elements
Dependencies are inferred from the claim text.