Method for shutdown of vehicle brakes

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8172338
APP PUB NO 20080305932A1
SERIAL NO

11760910

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS LLCDETROIT, MI12722

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Karnjate, Timothy M Grand Blanc, US 15 285
Manosh, William K White Lake, US 10 215

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
* 5988769 Brake system for vehicle 3 1996
 
GENERAL MOTORS CORPORATION (1)
* 5609401 Proportional braking system with dual poppet valves 11 1995
 
DAIMLERCHRYSLER AG (1)
6557951 Brake system with hydraulic brake booster and corresponding method 1 2001
 
KELSEY-HAYES COMPANY (2)
* 6007160 Electrohydraulic brake booster and method of controlling same for smooth brake pedal feel 25 1998
* 6183050 Braking system with remote boost valve 25 1999
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
* 2008/0265,662 Brake System Fault Pedal Gain Change Method and System 8 2007
* Cited By Examiner

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