System and method for detection of degradation of vacuum...

Details System and method for detection of degradation of vacuum... System and method for detection of degradation of vacuum...

2007-03-13

2007-03-13

McCall, Eric S. (Department: 2855)

Measuring and testing

Brake testing

Reexamination Certificate

active

11157324

ABSTRACT:
Systems and methods for detecting degradation of a sensor in a vacuum brake booster coupled to a manifold of an internal combustion engine include measuring an engine or vehicle operating parameter to detect operating or control conditions and detecting degradation of the sensor based on the engine or vehicle operating parameter. In one embodiment the operating parameter is a measured or estimated manifold pressure. A pressure drop across a check valve disposed between the brake booster and the intake manifold may also be considered.

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