Gm Global Technolgoy Operations, Inc.

Bjorn E Soderstrom

Michael J Lucido

J Michael Gwidt

Wajdi B Hamama

Jesse Michael Gwidt

Kevin M Luchansky

Craig Michael Sawdon

Dustin L Gardner

An engine control system for a vehicle includes a timer module, a stochastic pre-ignition (SPI) mitigation module, and a boost control module. The timer module tracks a period of operation of an engine where vacuum within an intake manifold is less than a first predetermined vacuum. The SPI mitigation module generates an SPI signal when the period is greater than a predetermined period and the vacuum is less than a second predetermined vacuum. The second predetermined vacuum is less than the first predetermined vacuum. The boost control module reduces output of a turbocharger in response to the generation of the SPI signal.

Stochastic pre-ignition prediction and mitigation systems and methods

An engine control system comprises an engine speed monitoring module and a pump control module. The engine speed monitoring module compares an engine speed and a predetermined threshold. The pump control module deactivates a pressure pump based on said comparison.

Deactivation of high pressure pump for noise control

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West Bloomfield, MI, United States of America

Bjorn E Soderstrom