Exhaust system for internal combustion engine

Details Exhaust system for internal combustion engine Exhaust system for internal combustion engine

1985-10-09

1987-11-24

Cuchlinski, Jr., William A.

Power plants

Internal combustion engine with treatment or handling of...

Divider, collector, valve means, or boundary layer device...

123323, F01N 700

Patent

active

047079878

ABSTRACT:
A part of an exhaust system 1 for an internal combustion engine has a valve 2 which can be moved by means such as a vacuum actuator 3 from a fully open inoperative position to an operative position in which it restricts the exhaust passageway by a variable amount. In the operative position, resilient means such as a coil spring 8 urges the valve to close the exhaust passageway against the pressure of exhaust gases, thereby increasing the backpressure on the engine in a controlled way. This is done on start-up to reduce the warm-up time of the engine and to reduce hydrocarbon emissions. When the engine has warmed up, the actuator 3 moves the valve to its inoperative position.

REFERENCES:
patent: 3234924 (1966-02-01), May
patent: 3523418 (1970-08-01), Marsee
patent: 3577727 (1971-05-01), Warren

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