System for controlling brake pulsing at vehicle natural...

Details System for controlling brake pulsing at vehicle natural... System for controlling brake pulsing at vehicle natural...

2008-06-03

2008-06-03

Burch, Melody M (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Antilock control disabled or altered for acceleration or...

C303S003000, C303S191000, C701S071000

Reexamination Certificate

active

07380890

ABSTRACT:
A system is provided for controlling automatic brake systems to avoid pulsing vehicle brakes at certain natural vibration frequencies of the vehicle's mechanical systems such as a powertrain and driveline. The natural vibration frequencies of the vehicle's systems are determined and correlated with a range of possible braking regimes implemented by an on-board automatic brake control, such as an anti-lock braking (ABS) system. A proposed, normally appropriate ABS braking response to a sudden braking condition is either modified, accelerated or delayed when the proposed response is deemed likely to excite a vehicle natural frequency. The system improves ABS operation in vehicles having high effective inertia powertrains, such as those used in hybrid electric vehicles.

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