Air-fuel ratio control device of engine

Power plants – Internal combustion engine with treatment or handling of... – Having means analyzing composition of exhaust gas

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Details

60277, 60285, 123682, 123691, F01N 320

Patent

active

052282864

ABSTRACT:
An air-fuel ratio control device including an O.sub.2 sensor arranged in the exhaust passage downstream of a three-way catalyst. In the lean air-fuel ratio operating state such as at a fuel cut, when a large amount of oxygen is introduced to the three-way catalyst, air-fuel ratio feedback control by the O.sub.2 sensor output is stopped. Next, after the end of the lean air-fuel ratio operating state, the resumption of the air-fuel ratio feedback control by the O.sub.2 sensor output is delayed for a predetermined time T and, during the delay period, the air-fuel ratio upstream of the catalyst is made rich.

REFERENCES:
patent: 3939654 (1976-02-01), Creps
patent: 4027477 (1977-06-01), Storey
patent: 4089313 (1978-05-01), Asano et al.
patent: 4111162 (1978-09-01), Norimatsu et al.
patent: 4127088 (1978-11-01), Ezoe
patent: 4130095 (1978-12-01), Bowler et al.
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4178884 (1979-12-01), Norimatsu et al.
patent: 4186691 (1980-02-01), Takase et al.
patent: 4235204 (1980-11-01), Rice
patent: 4244340 (1981-01-01), Herth et al.
patent: 4251989 (1981-02-01), Norimatsu et al.
patent: 4401086 (1983-08-01), Miyagi
patent: 4462373 (1984-07-01), Kanno
patent: 4475517 (1984-10-01), Kobayashi et al.
patent: 4502443 (1985-03-01), Hasegawa et al.
patent: 4539958 (1985-09-01), Ito et al.
patent: 4561400 (1985-12-01), Hattori
patent: 4571683 (1986-02-01), Kobayashi et al.
patent: 4693076 (1987-09-01), Chujo et al.
patent: 4697567 (1987-10-01), Sawada et al.
patent: 4707985 (1987-11-01), Nagai et al.
patent: 4712373 (1987-12-01), Nagai et al.
patent: 4720973 (1988-01-01), Katsuno
patent: 4723521 (1988-02-01), Mieno
patent: 4739614 (1988-04-01), Katsuno et al.
patent: 4760822 (1988-08-01), Mieno
patent: 4881368 (1989-11-01), Demura et al.
patent: 4941138 (1991-12-01), Norimatsu et al.
patent: 4964271 (1990-10-01), Sawada et al.
patent: 4964272 (1990-10-01), Kayanuma
patent: 5022225 (1991-06-01), Sawada et al.
patent: 5074113 (1991-12-01), Matsuoka

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