Gm Global Technolgoy Operations, Inc.

Richard H Clutz

Bahram Younessi

Michael Livshiz

Jeffrey M Kaiser

Richard B Jess

Donovan L Dibble

Kevin J Storch

William Conrad Albertson

Wenbo Wang

Mike M McDonald

Scott Joseph Chynoweth

Vincent A White

Gregory J York

Alfred E Spitza, Jr

Douglas J Moening

Chad W Lehner

Richard L Tiberg

Timothy J Braman

Colin A Roberts

Ronald C Allison

Yong Xu

William S Beggs

Bala K Murthy

Mark T Hutchinson

Eric S Kaufman

Robert Paul Black

Terrence E Connolly

William G Howell

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 system for limiting the speed of a vehicle includes a first module that generates a first torque signal based on a vehicle speed, a second module that generates a second torque signal based on a difference between a predetermined vehicle speed limit and the vehicle speed, and a third module that generates an output torque signal based on the first and second torque signals. The output torque signal is adapted to control the output torque of a motor.

Model based vehicle overspeed algorithm

A diagnostic system for an engine includes an oxygen detection module, a timing module and a control module. The oxygen detection module receives an oxygen signal from an oxygen sensor that detects an oxygen level in an exhaust system of the engine. The oxygen signal has N rich states and M lean states, where N and M are integers greater than or equal to 1. The timing module determines a rich period that the oxygen signal is in at least one of the N rich states and determines a lean period that the oxygen signal is in at least one of the M lean states. The control module detects an asymmetrical error with the oxygen sensor based on a comparison between the rich period and the lean period.

Asymmetrical oxygen sensor diagnostic and degradation compensation systems

A method of controlling a torque output of an internal combustion engine includes determining a pressure ratio, determining a reference torque based on the pressure ratio and a torque request, calculating a desired throttle area based on the reference torque and regulating operation of the engine based on the desired throttle area to achieve the desired torque.

Engine torque control at high pressure ratio

A torque control system for regulating operation of an engine includes a throttle that regulates air flow into the engine and a device that regulates a torque output of the engine. A first module determines a throttle area based on a desired manifold absolute pressure (MAP) and a desired manifold air flow (MAF) and a second module determines a device set-point based on a desired air per cylinder (APC) and an engine speed. A third module generates a throttle control signal to control the throttle based on the throttle area and generates a device control signal to control the device based on the device set-point.

Coordinated engine torque control

A torque control system for regulating operation of a displacement on demand engine that is operable in an activated mode and a deactivated mode includes a throttle that regulates air flow into the engine and a cam phaser that regulates a torque output of the engine. A first module determines a throttle area based on a desired deactivated manifold absolute pressure (MAP) and a desired mass air flow (MAF) and a second module determines a desired cam phaser position based on an engine speed and a transitional air per cylinder (APC) that is determined based on one of a desired deactivated APC and desired activated APC. A third module generates a throttle control signal to control the throttle based on the throttle area and a fourth module generates a cam phaser control signal to control the cam phaser based on the desired cam phaser position.

CAM phaser and DOD coordination for engine torque control

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Howell, MI, United States of America

Richard H Clutz