초록 ▼

When a vacuum booster fails, an pressure amplifying mechanism increases a wheel brake pressure. After that, even when it is detected that the vehicle is brought into a stopped state, the state in which an increased brake fluid pressure is applied to wheel cylinders is held. If a condition for termin

When a vacuum booster fails, an pressure amplifying mechanism increases a wheel brake pressure. After that, even when it is detected that the vehicle is brought into a stopped state, the state in which an increased brake fluid pressure is applied to wheel cylinders is held. If a condition for terminating control to maintain a stationary state of the vehicle is satisfied, that is, if a predetermined time period has elapsed since when the vehicle stops, the operation of the pressure amplifying mechanism is stopped to reduce the wheel cylinder pressure.

대표청구항 ▼

[ What is claimed is:] [1.] A vehicular brake system, comprising:a brake booster for boosting a brake pedal depressing force when a driver steps on a brake pedal;a brake fluid pressure generating device for generating a first brake fluid pressure due to the brake pedal depressing force boosted by a

[ What is claimed is:] [1.] A vehicular brake system, comprising:a brake booster for boosting a brake pedal depressing force when a driver steps on a brake pedal;a brake fluid pressure generating device for generating a first brake fluid pressure due to the brake pedal depressing force boosted by a boosting effect of said brake booster;a wheel braking force generating device for generating a wheel braking force by receiving the first brake fluid pressure;a fluid conduit for communicating said brake fluid pressure generating device with said wheel braking force generating device;a first detecting device for detecting at least one of a failure and a deterioration of function of said brake booster;a pressure increasing device for increasing a brake fluid pressure applied to said wheel braking force generating device to a second brake fluid pressure which is higher than said first brake fluid pressure when said first detecting device detects at least one of the failure and the deterioration of function of said brake booster;a second detecting device for detecting that the vehicle is stopped; anda holding device for holding the brake fluid pressure applied to said wheel braking force generating device to be higher than said first brake fluid pressure until a predetermined releasing condition is satisfied when said second detecting device detects that the vehicle is stopped after said pressure increasing device increases the brake fluid pressure applied to said braking force generating device to said second brake fluid pressure.