Diverter valve for exhaust system of internal combustion engine

Details Diverter valve for exhaust system of internal combustion engine Diverter valve for exhaust system of internal combustion engine

1977-12-23

1979-12-11

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60306, F01N 315

Patent

active

041776429

ABSTRACT:
A forced air control valve for an air injection system in an internal combustion engine has a diaphragm operated main valve member responsive to the vacuum from intake manifold to divert air from the exhaust system to atmosphere. A separate shifting or diverter valve for the exhaust system is temperature responsive and when the main valve member is open permits the supply of air to the exhaust manifold upstream of a catalytic converter only during cold engine operation. During warm engine operation when the main valve member is open, the separate shifting valve diverts the air to the catalytic converter. Upon deceleration during cold engine operation the separate diverter valve is shifted to divert air from the exhaust manifold to the catalytic converter. A temperature sensitive overheat switch is operable upon overheating of the catalyst to vent the forced air to atmosphere.

REFERENCES:
patent: 3906723 (1975-09-01), Matumoto
patent: 3934413 (1976-01-01), Beiswenger

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