Exhaust gas recirculation valve construction and method of makin

Details Exhaust gas recirculation valve construction and method of makin Exhaust gas recirculation valve construction and method of makin

1987-03-30

1988-11-08

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

25112911, F02M 2506, F16K 3104

Patent

active

047828110

ABSTRACT:
An exhaust gas recirculation valve construction and method of making the same are provided, the valve construction comprising a housing provided with an inlet and an outlet separated by a valve seat, an axially movable valve member carried by the housing for opening and closing the valve seat, an electrically operated stepper motor carried by the housing and being operatively interconnected to the valve member for axially positioning the valve member relative to the valve seat, the motor having a rotatable rotor threadedly interconnected to the valve member to cause axial movement of the valve member upon rotatable movement of the rotor, the valve member and the valve seat being arranged so as to be reverse acting, and a spring being operatively interconnected to the valve member to always move the valve member from an open position thereof to its closed position with the valve seat upon loss of electrical current to the motor.

REFERENCES:
patent: 4064851 (1977-12-01), Wessel
patent: 4173205 (1979-11-01), Toelle
patent: 4203573 (1980-05-01), Boss
patent: 4412517 (1983-11-01), Kobashi et al.
patent: 4473056 (1984-09-01), Ishida et al.
patent: 4499920 (1985-02-01), Steffan et al.
patent: 4561408 (1985-12-01), Jenkins
patent: 4595081 (1986-06-01), Parsons
patent: 4673160 (1987-06-01), Tolley
patent: 4674464 (1987-06-01), Akagi

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