Air/fuel ratio control system for internal combustion engine and

Details Air/fuel ratio control system for internal combustion engine and Air/fuel ratio control system for internal combustion engine and

1989-04-07

1991-06-25

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

60276, F02D 4114

Patent

active

050257676

ABSTRACT:
Disclosed herein is an air/fuel ratio control system for an internal combustion engine. The system includes a first oxygen density sensor element, a second oxygen density sensor element having a slower detection response speed than the first sensor element, an air/fuel ratio control unit for controlling the air/fuel ratio of the engine on the basis of results of a comparison between a detection value from the first sensor element and a standard value, and an air/fuel ratio control correction means for effecting a correction to the air/fuel ratio control by the air/fuel ratio control unit on the basis of results of comparison between a detection value from the second sensor element and a second standard value. An air/fuel ratio controlling oxygen density sensor is also disclosed. The sensor is constructed of a first oxygen density sensor element and a second oxygen density sensor element for detecting the density of oxygen in exhaust gas at a slower detection response speed compared to the first sensor element. The first and second oxygen density sensor elements are both provided on a common base member.

REFERENCES:
patent: 4117815 (1978-10-01), Ikeura
patent: 4145272 (1979-03-01), Nakamura et al.
patent: 4264425 (1981-04-01), Kimura et al.
patent: 4337746 (1982-07-01), Masaki

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