Borgwarner Inc.

Stephen Bohan

Joshua L Roby

John Shutty

Methods and systems for controlling the operation of a dual mode engine accessory, such as a dual mode cooling pump. The dual mode device has two modes of operation, an electric motor operation and a mechanical pulley-driven operation. A friction clutch mechanism controlled by the control system is utilized to switch between the two modes of operation. The speed of the electrical motor can be changed to be substantially the same as, or changed in the direction of, the speed of the mechanical pulley-driven system.

Control methods for dual mode cooling pump

An engine mounted fan clutch is disclosed that utilizes an actuator including two shape memory alloy actuation wires to engage and disengage a valve arm and ultimately the fan. The actuator also includes a controller and a position sensor to accurately determine the position of a valve arm. The fan clutch is part of a control system that continuously monitors the engine parameters and makes adjustments to keep the engine temperature within an acceptable range.

Growing community of inventors

Potterville, MI, United States of America

Stephen Bohan