Advics Co., Ltd.

Kunihiro Nishiwaki

Yasuhito Ishida

Takayuki Yamamoto

Tatsushi Kobayashi

Kyosuke Hata

Jun Nomura

The present disclosure comprises a reservoir cutoff valve provided on a pipe and configured to be opened in a non-energization state; a simulator cutoff valve provided on a pipe and configured to be closed in a non-energization state; an operation determination circuit configured to determine whether the brake operation member is in an operation execution state in which the brake operation member is being operated is; and a current control circuit that, when the operation determination circuit determines that the brake operation member is not in an operation execution state, supplies a first current to the reservoir cutoff valve, and when the operation determination circuit determines that the brake operation member is in an operation execution state, supplies a second current greater than the first current to the reservoir cutoff valve.

Braking control device

A braking device includes a stroke simulator, a hydraulic pressure generation unit, a reaction hydraulic pressure detection unit, a master hydraulic pressure detection unit, and a bottoming determination unit. The stroke simulator includes a cylinder and a piston slidably movable inside the cylinder in conjunction with an operation of a brake operation member. The stroke simulator causes a reaction force chamber to generate a reaction hydraulic pressure and applies a reaction force. The hydraulic pressure generation unit generates a master hydraulic pressure by driving a master piston and supplies a hydraulic pressure to a wheel cylinder. The reaction hydraulic pressure detection unit detects the reaction hydraulic pressure. The master hydraulic pressure detection unit detects the master hydraulic pressure. The bottoming determination unit determines whether the master piston is in a bottoming state based on the reaction hydraulic pressure and the master hydraulic pressure.

Braking device for vehicle

A vehicle braking device includes: a stroke simulator for generating a hydraulic pressure corresponding to a brake operation in a hydraulic chamber, the stroke simulator having a cylinder part and a piston part for sliding through the inside of the cylinder part in conjunction with a brake operation of a brake pedal; a booster mechanism having an input part directly pressed by the piston part or pressed by a spring interposed between the input part and the piston part in conjunction with the sliding of the piston part, and thereby moved in sliding fashion through the inside of the cylinder, and a hydraulic pressure generating part for generating a first hydraulic pressure corresponding to the movement of the input part based on the hydraulic pressure of an accumulator; and a wheel cylinder for applying a braking force to a vehicle wheel on the basis of the first hydraulic pressure.

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Toyota, Japan

Kunihiro Nishiwaki