Advics Co., Ltd.

Takahiro Kiso

Shintaro Osaki

Yoshikazu Tachiiri

Nobuyuki Saito

There is provided a brake control device for a brake device including a basic fluid pressure generating unit which generates a basic fluid pressure according to an operation to a brake operating member, a hydraulic pump which generates a fluid pressure to generate a differential pressure, a pressure regulating valve which regulates the differential pressure, and a friction brake mechanism which applies a fluid pressure obtained by adding the differential pressure to the basic fluid pressure, to a wheel cylinder. The control device includes a regulating unit which regulates the differential pressure according to an operating amount correlated value and which decreases the differential pressure according to an increase of the basic fluid pressure due to an increase of the operating amount correlated value when the vehicle is stopped and the differential pressure is regulated to a value larger than 0 by an operation to the brake operating member.

Brake control device for vehicle

In the brake control device, a wheel-cylinder hydraulic pressure (Pw) obtained by adding the linear-valve pressure difference to a master-cylinder hydraulic pressure (Pm) is applied to the wheel cylinder while the vehicle is running. When an operation of a brake pedal is started while the vehicle is running (t), the driving of the hydraulic pump is started. Thereafter, when the vehicle is stopped (t), the driving of the hydraulic pump is stopped. When the start of movement of the vehicle is detected during an operation of returning the brake pedal (t) and an operation of re-depressing the brake pedal is detected (t) in this state (specifically, while the vehicle is in a stopped state, the hydraulic pump is in a stopped state, and the brake pedal is being operated), the driving of the hydraulic pump is started (t).

A force sensor includes a shaft to which a magnet is fixed, and a case which can reciprocate with respect to the shaft and to which a Hall IC element is fixed. The Hall IC element outputs an output voltage which changes in accordance with relative displacement between the Hall IC element and the magnet. A main spring is interposed between the shaft and the case and elastically deforms in accordance with force produced between the shaft and the case in the reciprocating direction. A sub spring is provided in order to impart a preload such that when the amount of elastic deformation of the main spring is substantially zero, no axial clearance is formed between a flange portion of the shaft and one end portion of the main spring, and no axial clearance is formed between the case and the other end of the main spring.

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Chiryu, Japan

Takahiro Kiso