Hamilton Sundstrand Corporation

Weishun Willaim Ni

Ryan Shook

Steven A Heitz

Edward W Goy

Benjamin T Harder

Joseph Wetch

Mark W Shoemaker

Christian L Griffiths

Erik D LeBeau

Dennis A Erickson

David Lauriat

Dennis L Kaderabek

A variable displacement piston pump, having: a housing, a pivot assembly to pivot between minimal and maximum pivot angles; a pump cover defining an actuator bore with an actuator piston, an actuator arm extending from the actuator piston to the pivot assembly; and an electronic control unit (ECU) coupled to the pump, the ECU having: a pump controller, a linear variable differential transducer (LVDT) coupled to the pump controller and the actuator piston, and an electrohydraulic solenoid valve (EHSV) coupled to the pump controller, the ECU is configured to: determine a pivot differential for the pivot assembly between a target pivot angle and a current pivot angle; determine a position differential for the actuator piston, corresponding to the pivot differential of the pivot assembly; control the EHSV to move the actuator piston by the position differential; and determine, from the LVDT, that the actuator piston moved by the position differential.

Variable displacement piston pump with electronic control unit to provide direct metering control

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Rockton, IL, United States of America

Weishun Willaim Ni