By-pass valve

Details By-pass valve By-pass valve

1978-12-26

1981-03-24

Koczo, Jr., Michael

Power plants

Internal combustion engine with treatment or handling of...

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

F02B 7510

Patent

active

042572266

ABSTRACT:
A by-pass valve (1) for use in the exhaust system of an internal combustion engine has an improvement comprising control means (69) responsive to engine vacuum for exposing a chamber (27) to engine vacuum, the control means being responsive to an abrupt change in engine vacuum such as occurs during engine decelerations for spoiling the vacuum in the chamber and causing a vacuum responsive means (19) to close a first valve (15) and open a second valve (17). The control means reestablishes the vacuum in the chamber after a predetermined time interval and causes the vacuum responsive means to open the first valve and close the second valve, the controlled opening and closing of the first and second valves preventing engine backfires.

REFERENCES:
patent: 3924409 (1975-12-01), Heilman
patent: 3975905 (1976-08-01), Shimo
patent: 4033125 (1977-07-01), Inada
patent: 4050249 (1977-09-01), Collins
patent: 4070830 (1978-01-01), Beiswenger
patent: 4178755 (1979-12-01), Klimaszewski

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