Eaton Corporation

Andrew W Westergaard

Kenneth J Parker

Roger L Kennedy, Jr

Daniel L Deland

John A Ness

A solenoid operated valve is controlled upon increasing energization for greater flow by incrementing by a small fraction of the maximum current a target current level for the desired flow for a short duration followed by energization at the target level. Upon decreasing energization for lesser flow, the valve is energized at a target current decremented by a small fraction of the maximum current for a short duration. The result is a nearly negligible hysteresis.

Method of energizing solenoid operated valves

An improved regulator valve for controlling the purging of fuel vapors collected in a canister and an evaporative emission control system into an intake system of an internal combustion engine employs a solenoid valve assembly with an armature disposed outside of the coil to operate with low friction. A spring separating the armature from the valve member allows the spring to absorb most of the magnetic and gravitational side loading.

Growing community of inventors

Rochester, MI, United States of America

Andrew W Westergaard