Cummins Inc.

Cummins Emission Solutions Inc.

Jaime Antonio Lugo-Castillo

Richard A Booth

Martin T Books

Jack Schneider

Alex D Harrington

Quresh Sutarwala

Yuanchun Cai

Sashwat Mahapatra

Odaro Omusi

Balan Mariappan Selvaraj

Sathya Narayanan Hariharan

A method of reducing rollback of a electric vehicle, including determining a position baseline of the electric vehicle; determining a position compensated speed of the electric vehicle based on the position baseline; determining a hold torque as a function of the position compensated speed; and generating a command to apply the hold torque to the motor-generator of the electric vehicle.

Electric drive vehicle with anti-rollback control

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 of controlling torque of an electric vehicle, including sensing a surface grade; determining an acceleration of the vehicle; determining an initial torque of the vehicle; estimating a weight of the vehicle based the surface grade, the acceleration, and the initial torque; converting the weight of the vehicle to a weight factor; and determining an output torque by applying the weight factor to the initial torque.

Vehicle mass and road grade based regenerative braking and anti-rollback

Methods and systems for operating a vehicle on a reduced traction surface are disclosed. A controller of the vehicle obtains at least one of: ambient information or GPS information, determines a derate increment size based on the ambient or GPS information, imposes a sustained derate by applying a torque limit on a braking torque of the vehicle based on the derate increment size in response to detecting a traction control event. The controller also determines a verification period and a derate reduction period based on the ambient or GPS information to reduce the sustained derate in response to detecting a lack of traction control event during the verification period at a rate determined by the derate reduction period.

Method and system for performing regenerative braking with feedback from brake-traction control system

Systems and methods to determine the pressure differential for selective catalytic reduction systems includes a first sensor coupled to an inlet of a selective catalytic reduction system, a second sensor coupled to an outlet of the selective catalytic reduction system, and a controller communicatively coupled to the selective catalytic reduction system. The controller is configured to interpret a first parameter indicative of a first pressure amount of the selective catalytic reduction system measured by the first sensor, interpret a secondary parameter indicative of a secondary pressure amount of the selective catalytic reduction system measured by the second sensor, determine a plurality of operating parameters based, at least in part, on the interpretation of the first parameter and the secondary parameter, and generate a selective catalytic reduction command based, at least in part, on the determination of the plurality of operating parameters.

Growing community of inventors

Unionville, IN, United States of America

Jaime Antonio Lugo-Castillo