Toyota Motor Engineering & Manufacturing North America, Inc.

Ronald J Toth

Luke Alan Rippelmeyer

Christopher M Bulpitt

A control apparatus and method for a two motor drive system of an electric vehicle A spline connects the two Motors, and a second spline connects a motor to a transmission. The control apparatus is configured to in positive driving traction, initiate torque change of the first motor and delay torque change of the second motor, in negative driving traction, initiate torque change of the second motor and delay torque change of the first motor, in downshift of the transmission, initiate torque change of the first motor and delay torque change of the second motor, and in upshift of the transmission, initiate torque change of the second motor and delay torque change of the first motor. The control of torque and the initiation sequence of torque change between the two motors is such that impacts from backlash are substantially reduced, and vibration and noise phenomena are minimal.

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Redondo Beach, CA, United States of America

Ronald J Toth