Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1987-10-08
1989-06-20
Dolinar, Andrew M.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 123489, F01N 320, F02D 4114
Patent
active
048400270
ABSTRACT:
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an air-fuel ratio correction amount is calculated in accordance with the outputs of the upstream-side and downstream-side air-fuel ratio sensors, thereby obtaining an actual air-fuel ratio. When the output of the downstream-side air-fuel ratio sensor is switched from the rich side to the lean side or vice versa, the speed of renewal of the air-fuel ratio correction amount by the output of the downstream-side air-fuel ratio sensor is remarkably increased, and thereafter, this renewal speed is gradually decreased.
REFERENCES:
patent: 3939654 (1976-02-01), Creps
patent: 4027477 (1977-06-01), Storey
patent: 4099491 (1978-07-01), Reddy
patent: 4130095 (1978-12-01), Bowler et al.
patent: 4178884 (1979-12-01), Norimatsu et al.
patent: 4235204 (1980-11-01), Rice
patent: 4401086 (1983-08-01), Miyagi
patent: 4475517 (1984-10-01), Kobayashi et al.
patent: 4539958 (1985-09-01), Ito et al.
patent: 4561400 (1985-12-01), Hattori
patent: 4571683 (1986-02-01), Kobayashi et al.
Dolinar Andrew M.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Double air-fuel ratio sensor system having improved exhaust emis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Double air-fuel ratio sensor system having improved exhaust emis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double air-fuel ratio sensor system having improved exhaust emis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-519046