Patent ID: 7509933

Claim:
An electro-hydraulic lash adjuster for selectively activating and deactivating a valve train in an internal combustion engine, comprising: a) a body having a longitudinal bore; b) a piston slidably disposed in said longitudinal bore; c) a check valve disposed in said body in communication with said longitudinal bore for admitting hydraulic fluid from said engine to said longitudinal bore to displace said piston outwards of said body; d) an adjuster valve disposed within said body in communication with said longitudinal bore to selectively capture and release hydraulic fluid in said longitudinal bore; and e) a solenoid actuator connected to said adjuster valve for selectively opening and closing said adjuster valve to alternatively open and close said longitudinal bore in alternatively deactivating and activating said valve train; wherein hydraulic fluid selectively captured within said longitudinal bore by said adjuster valve prevents said piston from collapsing within said longitudinal bore, and wherein hydraulic fluid selectively released from within said longitudinal bore by said adjuster valve permits said piston to collapse within said longitudinal bore.