Low speed back pressure generator for affecting torque of an int

Details Low speed back pressure generator for affecting torque of an int Low speed back pressure generator for affecting torque of an int

1988-07-15

1990-03-20

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60316, F01N 300

Patent

active

049090348

ABSTRACT:
A back pressure generator for affecting torque of an internal combustion engine having an exhaust system comprises a tubular housing, a main passage part for exhaust gas in the housing, a valve body movably supported in the main passage part for movement in response to the force of exhaust gas on the valve body, a valve seat in the main passage part which when engaged by the valve body closes the main passage part, a spring for resiliently urging the valve body towards the closed position having a predetermined force characteristic for moving the valve body into the closed position when the engine is idling and allowing the valve body to move in a direction downstream relative to the exhaust gas flow proportionally in response to the force of the exhaust gas on the valve body to a fully open position, regulating holes in the main passage engageable by the valve body for controlling the flow of exhaust gas through the main passage in response to the position of the valve body, and a separate passage in the housing for bypassing flow of exhaust gas around the valve body when the valve body is in the closed position and having a size for restricting flow sufficiently to produce back pressure in the exhaust system and affect the torque of the engine without stalling the engine.

REFERENCES:
patent: 1025251 (1912-05-01), Desmond
patent: 1424234 (1922-08-01), Bowen
patent: 1473668 (1923-11-01), Byrnes
patent: 1800927 (1929-05-01), Brittain
patent: 1867802 (1930-05-01), Bogert
patent: 2110986 (1938-03-01), Kadenacy
patent: 2188444 (1940-01-01), Sauer
patent: 2586788 (1952-02-01), Cushman
patent: 2845774 (1955-02-01), Bertin
patent: 3234924 (1966-02-01), May
patent: 3969895 (1976-07-01), Krizman
patent: 4060985 (1977-12-01), Fukushima

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