Apparatus and method for controlling air-fuel ratio in...

Details Apparatus and method for controlling air-fuel ratio in... Apparatus and method for controlling air-fuel ratio in...

2005-06-07

2005-06-07

Huynh, Hai (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Using multiple injectors or injections

C701S103000

Reexamination Certificate

active

06901906

ABSTRACT:
In air-fuel ratio feedback control, a rich skip amount is made larger than a lean skip amount by an offset amount OS such that a feedback control center is offset to the rich side. As a result, the amount of error from an erroneous detection by an O2sensor is absorbed and deterioration of gas emissions in a multiple-injection mode is minimized.

REFERENCES:
patent: 5970950 (1999-10-01), Shimizu et al.
patent: 6073606 (2000-06-01), Shimizu et al.
patent: 6116208 (2000-09-01), Nishimura et al.
patent: 6631704 (2003-10-01), Ogawa et al.
patent: 196 46 941 (1998-05-01), None
patent: 101 15 996 (2002-10-01), None
patent: 2000-045840 (2000-02-01), None
Patent Abstracts of Japan, JP 2000045840, Feb. 15, 2000, Toyota Motor Corp.

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