Gm Global Technolgoy Operations, Inc.

Timothy J Braman

Wenbo Wang

Michael Livshiz

Jeffrey M Kaiser

Donovan L Dibble

Rafat F Hattar

Krishnendu Kar

Gregory J York

Bahram Younessi

Jason Thomas Davis

Kevin J Storch

Alfred E Spitza, Jr

Richard H Clutz

Dean R Kwapis

Maher El-Jaroudi

Matthew M Manning

Thomas C Pelton

An engine control system includes a fuel system including a first fuel pump in fluid communication with a fuel tank and a second fuel pump in fluid communication with the first fuel pump. A pump control module selectively turns on the first fuel pump when a door opens before an engine is started, the engine is not cranking and a rail pressure of the first fuel pump is less than a predetermined rail pressure.

Fuel pump prime activated by door sensor

An adaptive engine speed control system includes an idle condition module that determines whether the engine is idling and determines whether an actual engine speed is different than a desired engine speed. The desired engine speed corresponds to a commanded engine speed. A torque reserve determination module adjusts at least one of a torque reserve and the desired engine speed based on the determination of whether the engine is idling and the determination that the actual engine speed differs from the desired engine speed. The torque reserve corresponds to a quantity of torque reserved to respond to an anticipated future load on the engine.

Adaptive engine speed control to prevent engine from roll and stall

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

A method of correcting a cam phaser system failure including detecting a cam phaser system fault and generating a control signal to correct said cam phaser system fault.

Method and apparatus to correct a cam phaser fault

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Williamston, MI, United States of America

Timothy J Braman