Solenoid control valve with particle gettering magnet

A hydraulic fluid solenoid valve, comprising a one-piece member forming a solenoid coil bobbin region and an integral check valve-receiving region having a check valve-receiving receptacle communicated to a fluid exhaust port, a solenoid armature, a fluid control valve movable relative to a fluid control port in response to armature movement, a check valve disposed in said receptacle, a solenoid coil on the coil bobbin region for receiving electrical signals to control armature movement, and a permanent magnet disposed on said valve to capture ferrous particles present in hydraulic fluid supplied to the supply port.

The combination of a hydraulic pressure supply bore of an internal combustion engine and a hydraulic fluid solenoid control valve, said valve comprising a fluid supply port communicated to said bore, a solenoid coil, a solenoid armature movable by energization of said solenoid coil, a check valve communicated to a fluid exhaust port of said control valve, a fluid control valve movable relative to a fluid control port of said valve in response to armature movement, and a permanent magnet disposed on said valve upstream of said fluid supply port to capture ferrous particles present in hydraulic fluid supplied via said bore to said fluid supply port.

A method of controlling hydraulic fluid pressure of a hydraulic valve lifter activation/deactivation system of an internal combustion engine using a solenoid actuated control valve, comprising providing a permanent magnet on said control valve at a location upstream relative to a fluid supply port of said control valve to capture ferrous particles present in hydraulic fluid supplied to said supply port.