Auxiliary air control valve for engine

Details Auxiliary air control valve for engine Auxiliary air control valve for engine

1987-12-28

1989-10-03

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123339, 123588, F02D 900, F02D 4108

Patent

active

048709441

ABSTRACT:
An auxiliary air control valve for an engine, comprising a valve casing which has an air inlet port and an air outlet port, and a valve seat having a valve port of prescribed diameter; a valve element which is disposed in the face of the valve seat to control the cross-sectional area of the internal air passage and has a movably tapered portion fitted in the valve port to control the cross-sectional area of the internal air passage depending on the positional relation between the valve element and the valve seat, and a cylindrical portion provided next to the maximum-diameter part of the tapered portion and moved in the valve port to make the cross-sectional area of the internal air passage minimum and allow an actuator to be moved to an extreme position while the cross-sectional area is kept minimum; a spring which urges the valve element in such a direction as to open the valve; and the actuator for moving the valve element against the force of the spring, depending on at least one operational parameter of the engine.

REFERENCES:
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patent: 4414943 (1983-11-01), Nagase
patent: 4417553 (1983-11-01), Ohkawa et al.
patent: 4480614 (1984-11-01), Kobashi et al.
patent: 4484552 (1984-11-01), Kobayashi et al.
patent: 4630585 (1986-12-01), Maraux
patent: 4690121 (1987-09-01), Kawanabe et al.
patent: 4724818 (1988-02-01), Kobayashi et al.

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