Fluid handling – Systems – Supply and exhaust
Patent
1994-06-17
1995-03-14
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
13762565, 25112907, 25112916, 25112918, F16K 1100
Patent
active
053969260
ABSTRACT:
A pressure balanced three-way solenoid valve including a valve housing having a valve chamber and a high pressure fluid supply passage, high pressure fluid outlet passage and drain passage communicating with the valve chamber is disclosed. A movable valve member is reciprocally received in the valve chamber so as to be reciprocated between first and second positions for selectively fluidically communicating the outlet passage with either the supply passage or drain passage. A first valve seat is formed in the valve housing and concentrically disposed in the valve chamber for fluidic communication between the outlet passage and drain passage and a second valve seat is concentrically disposed in a cavity formed in the movable valve member for sealing communication between the supply passage and outlet passages. A floating pin is received in the movable valve member cavity and communicates with the second valve seat for selectively fluidic communication between the supply passage and outlet passage with the floating pin including an impact absorbing element for absorbing the impact of the movable valve member when the movable valve member contacts the floating pin during de-energization of the solenoid. Transitional losses are readily controlled and a high initial closing velocity may be achieved while preventing closing bounce and thus the formation of any leakage path between the floating pin and movable valve member upon de-energization of the solenoid.
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Cavanagh Mark S.
Doszpoly Bela
Lane John D.
Pataki Arpad M.
Shields Kent V.
Cummins Engine Company, Inc.
Michalsky Gerald A.
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