Patent ID: 8827380

Claim:
A hydraulic vehicle braking system, comprising: at least one brake circuit; and a brake master cylinder connected to the at least one brake circuit through a separating valve, wherein the at least one brake circuit has (i) a hydraulic pump configured to generate a brake pressure in the vehicle braking system, and (ii) a spring-loaded hydraulic accumulator connected to the brake master cylinder by a simulator valve, wherein the simulator valve is a differential pressure valve including a double action control piston having a first side and a second side, wherein the first side is loaded with the brake pressure of the vehicle braking system and the second side is loaded with a brake master cylinder pressure, wherein the simulator valve is configured to be closed when the brake pressure is less than or equal to the master cylinder pressure, and is configured to be open only when the brake pressure is greater than the brake master cylinder pressure, wherein the simulator valve is a piston valve having a shut-off body, which is a shut-off piston connected mechanically to the control piston and is arranged in a cylinder with the control piston, opposite sides of the shut-off piston being in fluid communication with one another, and wherein the opposite sides of the shut-off piston are in fluid communication with one another through a passage in the shut-off piston.