Lean burn control method and device for internal combustion engi

Details Lean burn control method and device for internal combustion engi Lean burn control method and device for internal combustion engi

1993-09-29

1995-09-05

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

123682, F02D 4100

Patent

active

054471370

ABSTRACT:
A control device for an internal combustion engine capable of conducting lean burn control, such as exhaust gas emission control, always optimally regardless of a timewise change of the internal combustion engine, variations in engines, and an environmental change. The control device includes a detector for detecting a burn condition of the internal combustion engine, a lean limit air-fuel ratio factor map, a lean burn feedback logic, an oxygen concentration sensor, and a feedback control logic for controlling an air-fuel ratio to a theoretical air-fuel ratio, wherein lean burn is performed at the middle point between the lean limit air-fuel ratio and the theoretical air-fuel ratio.

REFERENCES:
patent: 4271798 (1981-06-01), Seitz et al.
patent: 4327689 (1982-05-01), Rachel
patent: 4434768 (1984-03-01), Ninomiya
patent: 4776312 (1988-10-01), Yoshioka et al.

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