Transmission heater system and method

Details Transmission heater system and method Transmission heater system and method

2011-01-25

2011-01-25

Le, David D (Department: 3655)

Machine element or mechanism

Gearing

Interchangeably locked

C475S117000

Reexamination Certificate

active

07874226

ABSTRACT:
A method for heating a transmission is provided. The transmission has at least one solenoid valve that hydraulically actuates a valve. The method includes the steps of measuring a transmission temperature, determining whether the transmission temperature is greater than or equal to a desired operating temperature, determining a currently selected gear ratio of the transmission, and overdriving at least one solenoid valve if the transmission has not achieved the desired operating temperature and if overdriving the solenoid valve will not disrupt the operation of the transmission for the currently selected gear ratio.

REFERENCES:
patent: 5803863 (1998-09-01), Hayward et al.
patent: 6641498 (2003-11-01), Okuwaki

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