1
Michael Livshiz, Joseph Robert Dulzo, Onassis Matthews, Donovan L Dibble, Alfred E Spitza Jr, Scott Joseph Chynoweth: Torque estimator for engine RPM and torque control. General Motors Corporation, Christopher DeVries, March 9, 2004: US06704638 (76 worldwide citation)

An engine toque estimator according to the invention includes a vehicle data bus that provides a plurality of engine operating inputs including at least one of engine RPM, spark and a dilution estimate. A steady state torque estimator communicates with the vehicle data bus and generates a steady sta ...


2
Kevin C Wong, Alfred E Spitza Jr, William R Venner III: Cylinder deactivation torque limit for noise, vibration, and harshness. GM Global Technology Operations, October 9, 2007: US07278391 (35 worldwide citation)

An engine control system for controlling the engine to transition between an activated mode where all cylinders are active and a deactivated mode where less than all cylinders are active is provided. The system includes: a noise vibration and harshness (NVH) limit module that determines a noise, vib ...


3
Christopher E Whitney, Andrew W Baur, Alfred E Spitza Jr, Zhong Li, Jeffrey M Kaiser: Increased fuel economy mode control systems and methods. June 25, 2013: US08473179 (32 worldwide citation)

An engine control system includes a desired manifold absolute pressure (MAP) module, a MAP to torque module, a threshold determination module, and a fuel economy (FE) mode module. The desired MAP module determines a desired MAP for operation of an engine in one of a cylinder deactivation mode and a ...


4
Kevin C Wong, Alfred E Spitza Jr: Extension of DOD operation in torque control system. GM Global Technology Operations, Christopher DeVries, April 3, 2007: US07198029 (11 worldwide citation)

An engine control system for regulating a torque output of a variable displacement engine includes a first module that calculates a torque modification term based on an engine operating parameter and a second module that determines a desired engine torque and an estimated engine torque. A third modu ...


5
Ian G Stahl, Alfred E Spitza Jr: Displacement on demand spark knock detection. General Motors Corporation, Christopher DeVries, July 13, 2004: US06763297 (10 worldwide citation)

False spark knock detection is minimized for a displacement on demand engine having activated and deactivated modes. The engine is operated in the activated mode. Knock detection is performed on all cylinders of the engine during the activated mode. The engine is operated in the deactivated mode. Kn ...


6
Paul A Bauerle, Joseph M Stempnik, Kerfegar K Katrak, Donovan L Dibble, Alfred E Spitza Jr, James L Worthing, John N Stockbridge, Edward J Tully: Learned airflow variation. General Motors Corporation, Christopher DeVries, October 18, 2005: US06957140 (9 worldwide citation)

A throttle control system for a vehicle includes a driver input that generates a control signal and a control module that generates a throttle control signal based on the control signal. The control module determines whether the throttle control signal is within one of a first and a second region, d ...


7
Paul A Bauerle, Allen B Rayl, Donovan L Dibble, Kerfegar K Katrak, Kevin J Storch, Alfred E Spitza Jr, Robert C Simon Jr: Displacement on demand with throttle preload security methodology. General Motors Corporation, Christopher DeVries, May 25, 2004: US06739314 (6 worldwide citation)

An engine control system and method monitors torque increase during cylinder deactivation for a displacement on demand engine. A timer is started at cylinder deactivation. A controller adjusts throttle position and determines whether cylinder deactivation completes within a predetermined time. The c ...


8
Paul A Bauerle, Kerfegar K Katrak, Kevin J Storch, Alfred E Spitza Jr, Kevin C Wong: Displacement on demand fault indication. General Motors Corporation, Christopher DeVries, January 18, 2005: US06843229 (5 worldwide citation)

An engine control system for monitoring torque increase during cylinder deactivation for a displacement on demand (DOD) engine includes a throttle and a controller. The controller adjusts a preload of the throttle prior to a cylinder deactivation event and determines whether a DOD fault is present d ...


9
Colin A Roberts, Richard H Clutz, Robert Paul Black, Kevin J Storch, Alfred E Spitza Jr, Richard L Tiberg, William S Beggs, Bala K Murthy, Terrence E Connolly, Mike M McDonald, William C Albertson, Eric S Kaufman: Engine control system for increased vehicle fuel economy. November 19, 2013: US08584647 (1 worldwide citation)

An engine control system comprises a driver input module, a cylinder actuation module, and an active fuel management (AFM) module. The driver input module generates a fuel saver mode (FSM) signal having a first state based upon a driver input. The cylinder actuation module selectively disables at le ...


10
Kevin C Wong, Alfred E Spitza Jr, William S Beggs: Method to optimize fuel economy by preventing cylinder deactivation busyness. Harness Dickey & Pierce, November 24, 2009: US07621252 (1 worldwide citation)

A method of transitioning an engine to a cylinder deactivation mode may include determining a ratio of time that the engine is operating in the cylinder deactivation mode for an engine operating condition relative to a total time of engine operation in the operating condition, determining a number o ...