| 摘要 |
A brake pressure regulating device, in particular an autoblocking device for hydraulic brake systems for motor vehicles, comprises a master cylinder and a pressure modulator for changing the hydraulic pressure in the wheel brake cylinders during the brake pressure regulating mode. The device is fitted with a motor-driven pump (8) for producing a hydraulic pressure and with an electronic regulator (5) for controlling the valves of the pressure modulator (2). During the regulating mode, the working chambers (10, 15) of the master cylinder (16) are under pump pressure. In prior art devices, the pump pressure in the working chamber (10) forces the push-rod pistons (11) and hence the brake pedal (1) back into their normal position. This is regarded as disadvantageous. According to the invention, the switching positions of the regulating valve lodged in the pressure rod piston are displaced into the cylinder during the brake pressure regulating mode. In this way, the brake pedal is not fully restored to its normal position during the regulating mode. Brake pedal operator comfort is thereby enhanced. |
