Detecting operation of a vehicle on an ascending grade

Details Detecting operation of a vehicle on an ascending grade Detecting operation of a vehicle on an ascending grade

2011-08-09

2011-08-09

Estremsky, Sherry (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S901000, C477S905000

Reexamination Certificate

active

07993243

ABSTRACT:
In a vehicle that includes an engine driveably connected to the vehicle wheels, an accelerator pedal, and an electric motor for transmitting power to at least some of the vehicle wheels, a method for indicating that the vehicle is operating on a grade having positive slope includes determining that displacement of the accelerator pedal is greater than a reference displacement, determining that a rate of change of the accelerator pedal displacement is greater than a reference rate of change of displacement, determining that vehicle deceleration is greater than a reference vehicle deceleration, and producing a signal representing that the vehicle is operating on a grade having positive slope.

REFERENCES:
patent: 4354236 (1982-10-01), Miki et al.
patent: 5794169 (1998-08-01), Jung et al.
patent: 5925087 (1999-07-01), Ohnishi et al.
patent: 7765047 (2010-07-01), Yu
patent: 7828694 (2010-11-01), Silveri et al.

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