EGR valve with force balanced pintle

Details EGR valve with force balanced pintle EGR valve with force balanced pintle

1994-05-19

1996-04-30

Okonsky, David A.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

F02M 2507, F16K 31126

Patent

active

055115314

ABSTRACT:
An electrically operated EGR valve has a pintle for opening and closing the valve. The pintle is actuated by an linear actuator to open and close two ports which are connected to the outlet of the valve. The pintle has a frustoconical surface which mates with the two ports. The input passageway to the EGR valve is in fluid communication with both sides of the pintle which are the sides taken in direction of the movement of the linear actuator. The pintle being pressure-balanced when the electrically operated linear actuator attempts to move the pintle to either further open or further close the ports, the pintle is more responsive without increasing the size of the actuator.

REFERENCES:
patent: 3774583 (1973-11-01), King
patent: 4106449 (1978-08-01), Matsumato et al.
patent: 4120480 (1978-10-01), Ando et al.
patent: 4122810 (1978-10-01), Berriman
patent: 4805582 (1989-02-01), Braun et al.
patent: 5027781 (1991-07-01), Lewis
patent: 5035228 (1991-07-01), Bender
patent: 5052363 (1991-10-01), Stiles
patent: 5351669 (1994-10-01), Herzog

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