Gm Global Technolgoy Operations, Inc.

Jeffrey R Kelly

David J Varda

Addison T Solak

Bryan J Williams

Scott G Shockley

Jared Lee

Robert Seungmo Lee

Systems and methods provide active control of rotor cooling. In a number of embodiments, a system includes a controller coupled with an electric machine having a rotor. The controller evaluates parameters related to the electric machine for flow rate requirements of the rotor, where the flow rate requirements relate to cooling of the rotor. A flow rate of a fluid for cooling the rotor is computed, where the flow rate is based on a composite of the flow rate requirements. A control valve signal is delivered to set a control valve to supply the flow rate to the rotor based on the parameters.

Rotor cooling system and method with dynamic flow rate control

A control system that generates one of a normal mode and a hot mode signal to control operation of a transmission includes a calculator that calculates a predicted temperature of a torque converter and a comparator that compares the predicted temperature to a threshold temperature. A timer generates one of the normal mode and the hot mode signals based on the predicted temperature and the threshold temperature.

Transmission and torque converter cooling control

Growing community of inventors

Whittaker, MI, United States of America

Jeffrey R Kelly