System and method for maintaining a vehicle at zero speed on...

Details System and method for maintaining a vehicle at zero speed on... System and method for maintaining a vehicle at zero speed on...

2005-05-24

2005-05-24

Siconolfi, Robert A. (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Odd condition or device detection

C303S020000, C477S092000, C477S172000, C477S185000, C701S054000

Reexamination Certificate

active

06896340

ABSTRACT:
Methods and apparatus are provided for determining when vehicle powertrain torque is being used to substantially maintain a vehicle at a substantially zero speed on a graded surface, and to shift the supplied torque from the powertrain to another vehicle system or component. A vehicle controller determines that the powertrain system is supplying a hold torque, which has a magnitude sufficient to substantially maintain the vehicle at a substantially zero speed on the graded surface. A brake torque at a magnitude at least equivalent to the hold torque is automatically applied from the vehicle brake system to thereby maintain the vehicle at the substantially zero speed. Thus, the powertrain system can remove the torque it is supplying to hold the vehicle at the substantially zero speed.

REFERENCES:
patent: 4666021 (1987-05-01), Messersmith
patent: 5916062 (1999-06-01), Siepker
patent: 6000488 (1999-12-01), Atkinson
patent: 6278916 (2001-08-01), Crombez
patent: 6336689 (2002-01-01), Eguchi et al.
patent: 6590299 (2003-07-01), Kuang et al.
patent: 20020063022 (2002-05-01), Shaw et al.
patent: 20040012250 (2004-01-01), Kuno et al.

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