A pedal feel emulator comprises a housing extending along a center axis between a closed end and an opened end and defining a chamber extending therebetween. A first piston is slidably disposed in the chamber. The first piston defines a compartment in fluid communication with the chamber. A second piston is slidably disposed in the compartment. A spring seat extends radially outwardly from the second piston. A first elastic member is located in the chamber extending between the spring seat and the closed end. A second elastic member is located in the compartment and extending between the spring seat and the first piston. A third elastic member is located between the second piston and the first piston. A brake system including the pedal feel emulator is also disclosed herein.

A pedal feel emulator comprises a housing extending along a center axis between a closed end and an opened end and defining a chamber extending therebetween. A first piston is slidably disposed in the chamber. The first piston defines a compartment in fluid communication with the chamber. A second piston is slidably disposed in the compartment. A spring seat extends radially outwardly from the second piston. A first elastic member is located in the chamber extending between the spring seat and the closed end. A second elastic member is located in the compartment and extending between the spring seat and the first piston. A third elastic member is located between the second piston and the first piston. A brake system including the pedal feel emulator is also disclosed herein.

A control unit for a brake system of a vehicle. Using a sensor signal, provided by a sensor and is in regard to a distance moved by a driver braking-force transmission component or by a booster force transmission component, the control unit discerns if a movable piston of a master brake cylinder of the brake system is moved by a brake actuating distance equal to a specified, limiting brake actuating distance, and, possibly, to output at least one control signal to a pump control unit of at least one hydraulic pump of the brake system. The pump control unit can be activated by the at least one control signal so that brake fluid may be conveyed from a brake fluid reservoir of the brake system into at least one wheel brake cylinder of the brake system using at least one hydraulic pump controlled by the pump control unit.

A control unit for a brake system of a vehicle. Using a sensor signal, provided by a sensor and is in regard to a distance moved by a driver braking-force transmission component or by a booster force transmission component, the control unit discerns if a movable piston of a master brake cylinder of the brake system is moved by a brake actuating distance equal to a specified, limiting brake actuating distance, and, possibly, to output at least one control signal to a pump control unit of at least one hydraulic pump of the brake system. The pump control unit can be activated by the at least one control signal so that brake fluid may be conveyed from a brake fluid reservoir of the brake system into at least one wheel brake cylinder of the brake system using at least one hydraulic pump controlled by the pump control unit.

A vehicle pedal stroke detection apparatus acquires a first value based on a physical amount regarding a magnetic flux of a magnet that is output from a stroke sensor. The first value is a physical amount regarding a magnitude of a magnetic flux density of the magnet with respect to a displacement of a push rod. Then, the vehicle pedal stroke detection apparatus compares the first value and a second value. The second value is a preset physical amount regarding the magnitude of the magnetic flux density of the magnet with respect to the displacement of the push rod.

A vehicle pedal stroke detection apparatus acquires a first value based on a physical amount regarding a magnetic flux of a magnet that is output from a stroke sensor. The first value is a physical amount regarding a magnitude of a magnetic flux density of the magnet with respect to a displacement of a push rod. Then, the vehicle pedal stroke detection apparatus compares the first value and a second value. The second value is a preset physical amount regarding the magnitude of the magnetic flux density of the magnet with respect to the displacement of the push rod.

A brake system comprises a reservoir; a brake pedal; a master cylinder including a first master chamber, a second master chamber, a first master piston, and a second master piston; a first hydraulic circuit including at least one first hydraulic wheel brake; a second hydraulic circuit including at least one second hydraulic wheel brake; and a hydraulic pressure supplier including an actuator for pressurizing the first hydraulic circuit and the second hydraulic circuit depending on an operation of the brake pedal in a normal operating mode. The master cylinder further comprises a locking chamber and an elastic pedal feel element arranged in the first master chamber to be in contact with the first master piston and the second master piston for generating a pedal force when the brake pedal is operated while the second master piston is locked in the normal operating mode.

A brake system comprises a reservoir; a brake pedal; a master cylinder including a first master chamber, a second master chamber, a first master piston, and a second master piston; a first hydraulic circuit including at least one first hydraulic wheel brake; a second hydraulic circuit including at least one second hydraulic wheel brake; and a hydraulic pressure supplier including an actuator for pressurizing the first hydraulic circuit and the second hydraulic circuit depending on an operation of the brake pedal in a normal operating mode. The master cylinder further comprises a locking chamber and an elastic pedal feel element arranged in the first master chamber to be in contact with the first master piston and the second master piston for generating a pedal force when the brake pedal is operated while the second master piston is locked in the normal operating mode.

A hydraulic brake actuation assembly with a first and a second spool is disclosed. The hydraulic brake actuation assembly includes a first and a second subassembly which are configured to be mounted to each other in a pre-assembled manner. The first subassembly includes the first spool and a first actuation piston which are moveable along a first axis respectively. At least one first spring is located between the first spool and the first actuation piston along the first axis. The first subassembly includes the second spool and a second actuation piston which are moveable along a second axis respectively. At least one second spring is located between the second spool and the second actuation piston along the second axis. The first and the second axis are parallel to each other. The second subassembly includes a third and a fourth actuation piston. The third actuation piston is moveable along the first axis. It has a third contact surface which is able to contact a first contact surface of the first actuation piston. The fourth actuation piston is moveable along the second axis. It has a fourth contact surface which is able to contact a second contact surface of the second actuation piston.

A hydraulic brake actuation assembly with a first and a second spool is disclosed. The hydraulic brake actuation assembly includes a first and a second subassembly which are configured to be mounted to each other in a pre-assembled manner. The first subassembly includes the first spool and a first actuation piston which are moveable along a first axis respectively. At least one first spring is located between the first spool and the first actuation piston along the first axis. The first subassembly includes the second spool and a second actuation piston which are moveable along a second axis respectively. At least one second spring is located between the second spool and the second actuation piston along the second axis. The first and the second axis are parallel to each other. The second subassembly includes a third and a fourth actuation piston. The third actuation piston is moveable along the first axis. It has a third contact surface which is able to contact a first contact surface of the first actuation piston. The fourth actuation piston is moveable along the second axis. It has a fourth contact surface which is able to contact a second contact surface of the second actuation piston.