Vehicle braking apparatus

A brake device and wheel brake cylinder technology, which is applied in the direction of brake transmission device, brake action activation device, brake, etc., can solve the problems of motor miniaturization, inability to ensure responsiveness, etc., and achieve small size and light weight , Reduce the maximum load torque and improve the responsiveness
CN102556031AActive Publication Date: 2012-07-11HONDA MOTOR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HONDA MOTOR CO LTD
Publication Date
2012-07-11

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Abstract

The invention provides a vehicle breaking apparatus having a hydraulic pressure source which can generate brake hydraulic pressure corresponding to a piston forward movement driven by an electric motor. The apparatus enables the electric motor small and light-weighted while the responsiveness of the brake hydraulic pressure generation is ensured. The hydraulic pressure source with BBW-type brake apparatus comprises: a slave hydraulic cylinder (42), generating brake hydraulic pressure by the forward movement of the piston (48) driven by the electric motor (44); a VSA apparatus (23), by using a pump (64), pressurizing on the brake fluid at the downstream side of the slave hydraulic cylinder (42). For the slave hydraulic cylinder (42) and the VSA apparatus (23) are selectively acted based on the operation amount of a brake pedal (12), the slave hydraulic cylinder (42) is acted when the high responsiveness of generating brake hydraulic pressure is not required, so that the miniaturization of the electric motor (44) is achieved and the VSA apparatus (23) is acted when the high responsiveness of generating brake hydraulic pressure is required, thereby ensuring the high responsiveness.
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Description

technical field

[0001] The present invention relates to a brake device for a vehicle, comprising: an operation amount detection mechanism for detecting an operation amount of a brake pedal; a hydraulic pressure source for generating brake hydraulic pressure corresponding to the operation amount detected by the operation amount detection mechanism; a control mechanism that controls the operation of the hydraulic pressure source; and a wheel brake cylinder that operates with brake hydraulic pressure generated by the hydraulic pressure source. Background technique

[0002] A BBW (brake-by-wire) type vehicle braking device is known from Patent Document 1 below, in which cost reduction is achieved by miniaturizing an electric motor that uses a slave as a hydraulic pressure source. The dynamic hydraulic cylinder is operated, and at the same time, the responsiveness of the brake hydraulic pressure is improved, and the electric motor is subjected to weak field control to increase th...

Claims

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