US Patent No: 8,172,338
Number of patents in Portfolio can not be more than 2000
Method for shutdown of vehicle brakes
Stats
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May 8, 2012
Issued date -
Jun 11, 2007
filing date -
11/760,910
serial no -
In Force
status
Importance
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Abstract
At vehicle startup and vehicle shutdown, the driver modulates the brake pressure directly by depressing the brake pedal and the driver feels pedal resistance. During normal conditions of vehicle operation after vehicle startup, pressure boosted actuation of the vehicle brakes is provided by the modulation of boosted pressure from an accumulator via a boost valve operable in response to brake pedal depression, while an isolation valve isolates the pedal from direct influence by the brake pressure and the driver feels pedal resistance provided by a pedal simulator. Upon shutdown of boosted actuation, the boost valve reduces the brake pressure gradually over a calibrated period of time until the brake pressure substantially equals the pedal resistance then felt by the driver. Then the isolation valve reestablishes driver's feel of the brake pressure without an abrupt change in pedal resistance upon the reversion from boosted actuation to hydraulic unboosted actuation.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,007,160 Electrohydraulic brake booster and method of controlling same for smooth brake pedal feel | 20 | 1998 | |
| 6,183,050 Braking system with remote boost valve | 14 | 1999 | |
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| 6,557,951 Brake system with hydraulic brake booster and corresponding method | 1 | 2001 | |
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| 5,609,401 Proportional braking system with dual poppet valves | 10 | 1995 | |
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| 2008/0265,662 Brake System Fault Pedal Gain Change Method and System | 3 | 2007 | |
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| 5,988,769 Brake system for vehicle | 2 | 1996 | |
Patent Citation Ranking
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