Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1981-08-06
1984-05-29
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60290, 60293, F02B 7510, F01N 322
Patent
active
044506805
ABSTRACT:
An air/fuel ratio control system for use with an internal combustion engine, which includes a three-way catalyst arranged in the exhaust system of the engine, an electrical circuit operatively connecting an O.sub.2 sensor with fuel quantity adjusting means in a manner effecting feedback control of the air/fuel ratio of a mixture produced by the fuel quantity adjusting means and being supplied to the engine, in response to an output signal produced by the O.sub.2 sensor, and secondary air supply means for supplying atmospheric air into the exhaust system at a zone upstream of the O.sub.2 sensor. The secondary air supply means is adapted to operate only during open loop control of the air/fuel ratio.
REFERENCES:
patent: 3986352 (1976-10-01), Casey
patent: 4024707 (1977-05-01), Schmidt
patent: 4075834 (1978-02-01), Saito
patent: 4148188 (1979-04-01), Tokura
patent: 4149376 (1979-04-01), Masaki
patent: 4155335 (1979-05-01), Hosaka
patent: 4186691 (1980-02-01), Takase
patent: 4222237 (1980-09-01), Kohama
patent: 4363209 (1982-12-01), Atago
Narasaka Shin
Otsuka Kazuo
Shumpei Hasegawa
Hart Douglas
Honda Giken Kogyo Kabushiki Kaisha
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