1
William R Cawthorne, Gregory A Hubbard: Method for adjusting battery power limits in a hybrid electric vehicle to provide consistent launch characteristics. General Motors Corporation, Leslie C Hodges, March 15, 2005: US06868318 (153 worldwide citation)

A method is disclosed for improving the performance of an energy storage system that incorporates a high density electrical energy storage device, such a battery or ultracapacitor. The method may be implemented in an energy storage system of a hybrid electric vehicle (HEV) as a computer control algo ...


2
William R Cawthorne, Anthony H Heap, Gregory A Hubbard: Optimal selection of input torque considering battery utilization for a hybrid electric vehicle. General Motors Corporation, Christopher DeVries, April 3, 2007: US07200476 (35 worldwide citation)

A preferred input torque for a hybrid powertrain is determined within a solution space of feasible input torques in accordance with a plurality of powertrain system constraints that results in a minimum overall powertrain system loss. System power losses and battery utilization costs are calculated ...


3
Christopher E Whitney, William R Cawthorne, Anthony H Heap, Jeffrey M Kaiser, Dennis A Light, Jon C Wasberg, Weixin Yan: Method for controlling internal combustion engines in hybrid powertrains. GM Global Technology Operations, Quinn Law Group PLLC, July 9, 2013: US08483935 (29 worldwide citation)

A method for selectively creating vacuum in a hybrid powertrain controlled by a hybrid control processor and having an engine controlled by an engine control module includes requesting a pressure differential between a first intake point and a second intake point, wherein the first intake point and ...


4
Anthony H Heap, William R Cawthorne, Seamus T McGrath, Timothy M Karnjate, William K Manosh: System architecture for a blended braking system in a hybrid powertrain system. GM Global Technology Operations, Daimler, Chrysler Group, Bayerische Motoren Werke Aktiengesellschaft, November 26, 2013: US08594867 (26 worldwide citation)

An engine and a second power generating device transmit power through a transmission to a driveline to a wheel. A control module determines a regenerative braking axle torque capacity and a regenerative braking torque. Power output from the second power generating device is controlled based upon a r ...


5
Brian Welchko, Jonathan B Huse, Silva Hiti, Brendan M Conlon, Constantin C Stancu, Khwaja M Rahman, David Tang, William R Cawthorne: Fault handling of inverter driven PM motor drives. GM Global Technology Operations, October 9, 2007: US07279862 (20 worldwide citation)

An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to apply either an open-circuit response ...


6
William R Cawthorne, Anthony H Heap, Gregory A Hubbard: Optimal selection of input torque considering battery utilization for a hybrid electric vehicle. GM Global Technology Operations, March 15, 2011: US07908064 (19 worldwide citation)

A preferred input torque for a hybrid powertrain is determined within a solution space of feasible input torques in accordance with a plurality of powertrain system constraints that results in a minimum overall powertrain system loss. System power losses and battery utilization costs are calculated ...


7
William R Cawthorne, James E Tarchinski: Series interlock system with integrated ability to identify breached locations. GM Global Technology Operations, Ingrassia Fisher & Lorenz P C, August 16, 2011: US07999668 (18 worldwide citation)

A system is provided for implementing a series interlock loop. An example of the interlock system includes a series interlock loop, a data table, and a control module. The series interlock loop has an overall electrical characteristic. The series interlock loop includes first and second safety inter ...


8
Adam C Bennett, William R Cawthorne, Tung Ming Hsieh, Gregory A Hubbard: Silent operating mode for reducing emissions of a hybrid electric vehicle. General Motors Corporation, Christopher DeVries, October 24, 2006: US07127337 (15 worldwide citation)

This novel silent operating mode for a hybrid electric vehicle (HEV) reduces noise and emissions compared to traditional HEV operating modes. It is a complementary series of software control functions that allows the vehicle to operate with reduced noise and emissions where specifically needed, whil ...


9
William R Cawthorne, Steve T West: Method of determining battery power limits for an energy storage system of a hybrid electric vehicle. General Motors Corporation, Leslie C Hodges, September 20, 2005: US06946818 (15 worldwide citation)

A method of providing closed-loop control of power flowing into and out of an energy storage system (ESS), wherein the ESS comprises a battery is provided. The method may be implemented as a computer control algorithm for determining the charge and discharge limits for the ESS in a hybrid electric v ...


10
Gregory A Hubbard, Anthony H Heap, William R Cawthorne: Method for determining preferred input operating points for a vehicle transmission. General Motors Corporation, Christopher DeVries, September 19, 2006: US07110871 (14 worldwide citation)

Preferred operating points for a vehicle powertrain including an engine and a transmission are determined in accordance with a comprehensive operational mapping of input and output conditions and corresponding aggregate system losses corresponding to engine and transmission losses. In a hybrid trans ...