Caterpillar Inc.

Raj T Nagarajan

Craig William Lohmann

Glen F Forck

Steven Francis Meister

Charles R Miller

Kirk S Shively

Howard N Cannon

Jeffrey J Carter, Jr

A valve includes a housing having a high pressure inlet, a low pressure inlet, an outlet and first and second sealing surfaces. A pilot valve is disposed in the housing and includes a valve element movable between first and second positions. A movable spool is also disposed in the housing and includes third and fourth sealing surfaces engagable with the first and second sealing surfaces, respectively, carried by the housing to connect the outlet to the low pressure inlet when the valve element is in the first position and to connect the outlet to the high pressure inlet when the valve element is in the second position.

Solenoid actuated miniservo spool valve

An actuation valve for a hydraulically-operated fuel injector includes an actuator having a plunger and a spool valve coupled to the plunger. The spool valve includes a high pressure port and is operable by the actuator to selectively place the high pressure port or the low pressure port in fluid communication with an injection mechanism of the injector.

Direct-operated spool valve for a fuel injector

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Peoria, IL, United States of America

Raj T Nagarajan