Air-fuel ratio optimization logic for an electronic engine contr

Details Air-fuel ratio optimization logic for an electronic engine contr Air-fuel ratio optimization logic for an electronic engine contr

1992-06-16

1994-01-04

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

F02D 4114

Patent

active

052751422

ABSTRACT:
An air-fuel optimization logic for an electronic engine control system for optimizing the efficiency of a heat engine. The engine control system has a governor generating fuel command signals to maintain speed of the engine at a desired speed, means for generating a reference air-fuel ratio signal, means responsive to the fuel command signal and the air-fuel ratio signal for supplying air to the engine, and means responsive to the fuel command signal for supplying fuel to the engine. The air-fuel optimization logic has means responsive to a change in the fuel command signal to generate an optimized air-fuel ratio offset signal which when summed with the a reference air-fuel ratio signal produces an optimized air-fuel ratio signal. The air-fuel optimization logic increments the reference air-fuel ratio signal to find a lean offset and decrements the reference air-fuel ratio signal to find a rich offset. The lean and rich offsets are averaged to generate the optimized air-fuel ratio offset.

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patent: 4377143 (1983-03-01), Hamburg
patent: 4617892 (1986-10-01), Staerzl

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