Vehicle speed dependant calibration trim for improved fuel...

Details Vehicle speed dependant calibration trim for improved fuel... Vehicle speed dependant calibration trim for improved fuel...

2007-12-11

2009-10-20

Vo, Hieu T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

Reexamination Certificate

active

07606653

ABSTRACT:
A control system and method for improving vehicle fuel economy is provided. A base timing module generates a base timing signal. A trim module calculates a vehicle speed compensation factor and generates a timing trim signal based on the vehicle speed compensation factor. A vehicle speed trim module adjusts a calibration parameter (such as engine timing for example) based on the base timing signal and the timing trim signal. According to some implementations, the trim module includes a base trim module and a vehicle speed compensation module. The base trim module generates a base trim signal. The vehicle speed compensation module generates the vehicle speed compensation factor. The base trim signal can be based on a speed of the engine. The base trim signal can further be based on a quantity of fuel delivered to the engine.

REFERENCES:
patent: 4896641 (1990-01-01), Nagano et al.
patent: 6857418 (2005-02-01), Corba
patent: 7006910 (2006-02-01), Schuricht et al.

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