Electric-motor-drivable pressure generator for a hydraulic brake

Details Electric-motor-drivable pressure generator for a hydraulic brake Electric-motor-drivable pressure generator for a hydraulic brake

1990-07-23

1992-02-04

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303115EC, B60T 834

Patent

active

050854909

ABSTRACT:
A slip control system for a hydraulic brake system of a vehicle, which comprises a pressure generator having a plunger piston, which plunges into a cylinder filled with brake fluid and is connected to a rack. For the forward drive of the plunger piston, an electric drive motor is provided, which via a gear drive drives a pinion meshing with the rack. For the return drive of the plunger piston, a spiral spring is used that engages on one end with pinion shaft and on the other is supported on the pressure generator housing. The use of the spiral spring makes a short axial structural length of the pressure generator attainable. A grip roller free-wheel clutch is also provided in the drive train between the motor and the rack. The grip roller free-wheel clutch effects an uncoupling of the gear drive and the drive motor when the rack, at the end of the return stroke, strikes a stop of the pressure generator housing. This prevents damage to the gear drive and motor.

REFERENCES:
patent: 3895814 (1975-07-01), Willetts
patent: 4022307 (1977-05-01), Berrie et al.
patent: 4166657 (1979-09-01), Blomberg et al.
patent: 4619151 (1986-10-01), Trachman et al.
patent: 4756391 (1988-07-01), Agarwal et al.
patent: 4805965 (1989-02-01), Jonner et al.
patent: 4950028 (1990-08-01), Harrison

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