Cummins Inc.

Yuanchun Cai

Martin T Books

Richard A Booth

Joseph E Paquette

Patrick Kaufman

Jaime Antonio Lugo-Castillo

Elizabeth Weitzel

Balan Mariappan Selvaraj

Sathya Narayanan Hariharan

Galdino Ferretiz

A control system for controlling a powertrain of an electric or hybrid electric vehicle is disclosed. The powertrain comprises a battery and a traction motor and is operable in a regenerative braking mode. The control system is configured to generate a deceleration target for the vehicle in the regenerative braking mode, and to generate a torque command for the traction motor based on the deceleration target. By generating a deceleration target for the vehicle during regenerative braking and using the deceleration target to control the torque of the traction motor, more consistent regenerative braking may be provided, particularly when the vehicle is used to carry different loads.

Optimizing regenerative braking

A method to control an output voltage of a DC-DC converter, and voltage control logic operable to generate a voltage command to implement the control method, the method including sensing a voltage of a bus of an electric-drive vehicle; increasing a command voltage signal from the sensed voltage to a nominal voltage during a first time period; increasing the command voltage signal from the nominal voltage to a desired voltage during a second time period greater than the first time period; and generating a voltage output based on the command voltage signal.

DC-DC converter control

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Davis, CA, United States of America

Yuanchun Cai