1
William R Robertson, Sergio Eduardo Garcia, Craig A Carlson, Darrell W Burleigh: Compensation for fuel volatility for internal combustion engine start and run. Delphi Technologies, Jimmy L Funke, January 20, 2004: US06679225 (8 worldwide citation)

The present invention provides an improvement over conventional engine controls by adjusting engine air/fuel [AF] ratio, as a function of fuel volatility, during engine start and initial operation. It is comprised of three detection tests to determine the volatility of the fuel and provide ...


2
Kathryn Wolfe, Darrell W Burleigh: System and method for determining engine exhaust composition. GM Global Technology Operations, Quinn Law Group PLLC, June 24, 2014: US08762026 (6 worldwide citation)

An engine assembly includes a controller and at least one data storage medium storing a database. The database includes empirically-derived NOx values based on engine equivalence ratio and engine speed at predetermined reference conditions. The controller is configured to retrieve a NOx value from t ...


3
B Jerry Song, Vijay Ramappan, Darrell W Burleigh: Selective exhaust gas recirculation diagnostic systems and methods. GM Global Technology Operations, October 13, 2015: US09157390 (2 worldwide citation)

A system for a vehicle includes a first exhaust gas flow rate (EGF) estimation module, a second EGF estimation module, and an EGF fault detection module. The first EGF estimation module estimates a first flow rate of exhaust re-circulated back to an intake manifold based on a concentration of oxygen ...


4
Darrell W Burleigh, Sergio Quelhas, Lawrence A Staat, Kenneth C Swartz: Method for diagnosing leaks downstream of the purge flow control orifice. GM GLOBAL TECHNOLOGY OPERATIONS, Harness Dickey & Pierce, September 5, 2017: US09752539 (2 worldwide citation)

A vapor purge system for an engine, includes a purge valve having a housing including an input port in communication with a purge canister and including an output port in communication with an intake system component defining a first bore portion receiving the output port with a first seal member di ...


5
Vijay Ramappan, Darrell W Burleigh, Gerald W Fly: External EGR rate feedback. GM Global Technology Operations, November 29, 2016: US09506420 (1 worldwide citation)

An engine control system for a vehicle includes an exhaust gas recirculation (EGR) rate-estimation module and a control module. The EGR rate-estimation module receives a first signal indicating a first relative humidity of a flow of air and a second signal indicating a second relative humidity of a ...


6
Vijay Ramappan, Darrell W Burleigh, B Jerry Song: Systems and methods for controlling engine combustion stability. December 23, 2014: US08915236 (1 worldwide citation)

A control system for an engine includes first and second modules. The first module determines an oxygen concentration within an intake manifold of the engine. The second module regulates a flow of exhaust gas recirculation (EGR) into the intake manifold based on the determined oxygen concentration. ...


7
Sriram Ganapathy, John P Salvador, Tayoung Choi, Darrell W Burleigh: Method to perform adaptive voltage suppression of a fuel cell stack based on stack parameters. GM Global Technology Operations, John A Miller, Miller IP Group, June 26, 2012: US08206860 (1 worldwide citation)

A system and method for maintaining the voltage of fuel cells in the fuel cell stack below a predetermined maximum voltage. The method determines a desired voltage set-point value that defines a predetermined maximum fuel cell voltage value and uses the voltage set-point value and an average fuel ce ...


8
Patrick Frost, Darrell W Burleigh, Daniel C Di Fiore: Adaptive method to control fuel delivery injector with modeling uncertainties in a fuel cell system. GM Global Technology Operations, John A Miller, Miller IP Group, April 2, 2013: US08409762 (1 worldwide citation)

A method for adaptively controlling a fuel delivery injector in a fuel cell system, including determining a feed-forward bias for the fuel delivery injector, determining an injector flow set-point for the fuel delivery injector, monitoring stack current, determining a transient pressure correction f ...


9
Darrell W Burleigh, Randall S Beikmann: Systems and methods for controlling cylinder deactivation periods and patterns. GM Global Technology Operations, October 4, 2016: US09458780

Based on a desired average number of activated cylinders per sub-period of a predetermined period including P sub-periods, a cylinder control module selects one of N predetermined cylinder activation/deactivation patterns. The selected cylinder activation/deactivation pattern corresponds to Q activa ...


10
Robert Douglas Shafto, Darrell W Burleigh: System and method for improving fuel economy and reducing emissions when a vehicle is decelerating. GM GLOBAL TECHNOLOGY OPERATIONS, October 16, 2018: US10099675

A system according to the principles of the present disclosure includes a fuel control module, a transmission control module, and a starter control module. The fuel control module selectively stops fuel delivery to cylinders of an engine while the engine is coupled to a transmission of a vehicle whe ...