Caterpillar Inc.

Kenneth D Gihring

James A Antone

Errol W Davis

A solenoid driver circuit is controlled by an electronic control module ('ECM') and eliminates many components required for a high voltage power supply required by the prior art. The solenoid driver circuit includes a high voltage select switch, a select switch and a modulation switch that are controlled by the ECM. The ECM causes the switches to be opened and closed so that the back EMF created by the solenoid coil when the modulation switch is opened can be recaptured by charging a capacitor. That energy can then be used to energize the solenoid coil.

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Peoria, IL, United States of America

Kenneth D Gihring