Force balanced three-way solenoid valve

摘要

A pressure balanced three-way solenoid valve (1) including a valve housing (2) having a valve chamber (4) and a high pressure fluid supply passage (6), high pressure fluid outlet passage (8) and drain passage (10) communicating with the valve chamber is disclosed. A movable valve member (12) 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 (38) 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 (44) is concentrically disposed in a cavity (14) formed in the movable valve member for sealing communication between the supply passage and outlet passages. A floating pin (16) 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 (22) for absorbing the impact of the movable valve member when the movable valve member contacts the floating pin during de-energization of the solenoid.