Gm Global Technolgoy Operations, Inc.

William S Beggs

Alfred E Spitza, Jr

William Conrad Albertson

Mike M McDonald

Kevin C Wong

Kevin J Storch

Richard H Clutz

Richard L Tiberg

Colin A Roberts

Robert Paul Black

Bala K Murthy

Eric S Kaufman

Terrence E Connolly

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 least one of a plurality of cylinders of an engine based upon a deactivation signal having a first state. The AFM module generates the deactivation signal based on at least one engine parameter and at least one threshold. The at least one threshold is modified when the FSM signal has the first state.

Engine control system for increased vehicle fuel economy

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 of transitions from a full cylinder mode to the cylinder deactivation mode during the operating condition, determining a transition modifier based on the ratio and number, and modifying a transition criterion based on the transition modifier.

Method to optimize fuel economy by preventing cylinder deactivation busyness

Growing community of inventors

Fenton, MI, United States of America

William S Beggs