Internal combustion engine secondary air injection compensating

Details Internal combustion engine secondary air injection compensating Internal combustion engine secondary air injection compensating

1977-05-31

1979-02-06

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60289, F02B 7510, F01N 310

Patent

active

041377133

ABSTRACT:
An internal combustion engine having an exhaust system provided with exhaust gas purifying means and secondary air supplying means disposed upstream thereof includes a secondary air injection compensating system comprising vacuum introducing means adapted to introduce and reserve the vacuum from an intake manifold vacuum port; secondary air switching means including two diaphragm means and a valve mechanism linked therewith; information processing means adapted to process the information from and O.sub.2 sensor and an acceleration detector to make a selection therefrom and issue a command; and vacuum switching means including two vacuum switching valves for selective conduction of said vacuum to said secondary air switching means by said command, and a compensating switching valve. The information processing means operate to communicate either of said two vacuum switching valves with the vacuum and the other with the atmosphere simultaneously and, under the secondary air injecting condition, cause said compensating switching valve to induce atmospheric air into the atmosphere communication system.

REFERENCES:
patent: 3911674 (1975-10-01), Goto
patent: 3931710 (1976-01-01), Hartel
patent: 3962867 (1976-06-01), Ikeura
patent: 4068472 (1978-01-01), Takata

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