Electro-hydraulic braking system
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United States of America Patent
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-
Jul 8, 2003
Issued Date -
N/A
app pub date -
Apr 23, 2001
filing date -
Oct 24, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electro-hydraulic braking system of the type which operates normally in a brake-by-wire (EHB) mode wherein hydraulic pressure is applied to braking devices at the vehicle wheels in proportion to the driver's braking demand as sensed electronically at a brake pedal, but which, if the brake-by-wire mode should fail, operates in a push-through mode wherein hydraulic pressure is applied to the braking devices at the vehicle wheels by way of a master cylinder coupled mechanically to the brake pedal. In order to minimize jolting within the system when changeover from push-through to brake-by-wire braking takes place, the existence of a push-through condition is recognized during an initialization stage of the EHB mode and the initial EHB demand is set at the prevailing push-through braking or deceleration level and then adapted smoothly to the desired EHB demand.
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