Electronically controlled brake booster and method of operation

Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal

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Details

188356, 303125, 3031143, 303155, B60T 844, B60T 1368

Patent

active

058554203

ABSTRACT:
An electronically controlled brake booster for a vehicle brake system including a housing having a vacuum chamber and a servo chamber separated from the vacuum chamber by a movable wall. The brake booster further includes a control valve operable by an electromagnet. The control valve is coupled to the wall for common relative movement with respect to the housing. The electromagnet is connectable to a control unit generating a drive signal to operate the electromagnet. A braking pressure generation unit is connected to the movable wall for generating a braking pressure for a brake of the vehicle in dependance on the position of the movable wall. The drive signal is generated in the control unit in dependance on a control parameter, the parameter being adjusted in dependance on a dead time of the braking pressure between supplying the electromagnet with the signal and a rising of the braking pressure in response thereto.

REFERENCES:
patent: 5658055 (1997-08-01), Dieringer et al.
patent: 5711204 (1998-01-01), Michals

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