| 摘要 |
PURPOSE: To obtain a vehicle braking device which supplies specified deceleration to the vehicle through the specified operatin force of a pedal even when a loaded condition or brake condition of the vehicle are varied, and at the same time secure high reliability in function by arranging an additional control valve other than a conventional valve which is operated for mechanically controlling pressure difference in two chambers of a booster. CONSTITUTION: A motor vehicle braking device of this type has a brake pedal P to generate brake pressure in hydraulic fluid, a brake pressure booster 12 operated by differential pressure and adapted to be actuated by a first valve V1 which is mechanically pressurized by the brake pedal P, and a first sensor S1 to sense the pressure generated by the brake pedal. In such a setup, at least one of second sensors SR, SL is provided to sense vehicle deceleration or rotational retardation of braked wheels. In addition, a data processing unit is arranged for comparing the data obtained by the sensors S1 , SR, SL to each other, and emitting a control signal in response to the result of the comparison to a second valve V2 which is electrically controlled, and which valve V2 is operated for adjusting differential pressure in the brake pressure booster 12. |
