Control system and method for engine

Details Control system and method for engine Control system and method for engine

1996-03-04

1997-05-27

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

056322607

ABSTRACT:
An engine air-fuel ratio control system for a multi-cylinder engine that employs a fuel-air ratio sensor which is associated with only one cylinder. The other cylinders are operated leaner than that with which the sensor is associated. Also, the system can operate on an open control, and when switching from open control to feedback control, the incremental adjustments in fuel amount are initially made smaller and for a longer time period so as to reduce overshooting and hunting while permitting quick recovery during subsequent feedback control operation.

REFERENCES:
patent: 4962741 (1990-10-01), Cook et al.
patent: 5020502 (1991-06-01), Wild
patent: 5131371 (1992-07-01), Wahl et al.
patent: 5158058 (1992-10-01), Yoshida et al.
patent: 5419301 (1995-05-01), Schechter
patent: 5548514 (1996-08-01), Hasegawa et al.

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