Hydraulic active booster
View Patent ↗Disclosed is a hydraulic active booster capable of easily adjusting the structure of a simulator. The simulator of the hydraulic active booster includes a simulator housing having a first receiving part for receiving a control plunger, a second receiving part for receiving a part of a first piston into which the control plunger is inserted, and a third receiving part for receiving a simulator piston. The third receiving part is separated from the first and second receiving parts.
1. A hydraulic active booster comprising:
an input shaft connected to a brake pedal;
a pedal simulator to provide repulsive force against the brake pedal;
a control plunger connected to the brake pedal and movable in an axial direction in the pedal simulator;
a master cylinder including a first piston, into which the control plunger is inserted, and a second piston moving back and forth according to movement of the first piston to transfer hydraulic pressure to a wheel brake; and
an oil supply device for supplying oil to the pedal simulator,
wherein the pedal simulator includes a simulator housing having a first receiving part for receiving the control plunger, a second receiving part for receiving a part of the first piston into which the control plunger is inserted, and a third receiving part for receiving a simulator piston, and
the third receiving part is separated from the first and second receiving parts.
2. The hydraulic active booster of claim 1 , wherein the simulator piston, first and second simulator springs for elastically supporting the simulator piston, and simulator spring retainers for supporting the first and second simulator springs are provided in the third receiving part.
3. The hydraulic active booster of claim 2 , wherein the simulator housing is formed with a first oil port for supplying oil from the oil supply device to the second receiving part and a second oil port for supplying the oil to the third receiving part.
4. The hydraulic active booster of claim 3 , wherein the simulator housing is formed with an oil path allowing the oil introduced into the second oil port to be supplied to the third receiving part through the first receiving part.
5. The hydraulic active booster of claim 1 , wherein the first piston is formed with an insertion hole and the control plunger is inserted into the insertion hole in such a manner that a predetermined gap is formed between a rear end of the insertion hole and a front end of the control plunger.
6. The hydraulic active booster of claim 1 , wherein a pedal displacement sensor is connected to the input shaft to measure displacement of the brake pedal.