Air-fuel ratio control system of internal combustion engine

Details Air-fuel ratio control system of internal combustion engine Air-fuel ratio control system of internal combustion engine

1992-09-11

1993-07-06

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

F02D 4104, F02D 4134

Patent

active

052244520

ABSTRACT:
An air-fuel ratio control system of an automotive internal combustion engine comprises a surge detecting device for detecting the surge level of the engine under a lean combustion operation; a lean combustion limit detecting device which issues a first signal when the detected surge level exceeds a given allowable limit and a second signal when the detected surge level fails to exceed the given allowable limit; and an air-fuel mixture diluting device which, when the leans combustion limit detecting device issues the second signal, dilutes the air-fuel mixture in such a manner that a surge level of the engine given by the diluted air-fuel mixture closely approaches the given allowable limit.

REFERENCES:
patent: 4434768 (1984-03-01), Ninomiya
patent: 4543934 (1985-10-01), Morita et al.
patent: 4776312 (1988-10-01), Yoshioka et al.
patent: 5016593 (1991-05-01), Takaoka
patent: 5018498 (1991-05-01), Hoover

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