Gm Global Technolgoy Operations, Inc.

Scott John Fletcher

Jamison C Schroeder

Paul W Kelley

Jeffrey Johnson

Thomas L Bahensky

Mark L DeJong

Brent M Chamberlain

James S Baumgartner

Joseph M Stempnik

Nshan Hamparian

Ellen S Schwartz

Jose Deleon

Jose L DeLeon

John E Mc Donald

Michael Jacek

An engine system and method for operating an internal combustion engine includes a turbocharger that generates a boost to the engine. A coolant temperature of the engine is determined along with other based engine inputs and calculated values. A normal boost based on operating conditions of the engine is determined. A supplemental boost is determined based on the coolant temperature. An offset boost based on the normal boost and the supplemental boost is determined. An air output of the turbocharger is modified based on the offset boost. The supplemental boost increases combustion efficiency, which reduces white smoke exhaust.

Control system to minimize white smoke using variable nozzle turbo

A control system and method for increasing engine temperature for an engine having a variable nozzle turbo (VNT) is provided. An offset idle module generates an offset idle signal. A normal boost module calculates a normal boost. A supplemental boost module calculates a supplemental boost. An offset boost module generates an offset boost signal for the VNT based on the normal boost and the supplemental boost. A control module adjusts engine idle and VNT boost based on the offset idle signal and the offset boost signal.

Control system for diesel engine elevated idle and variable nozzle turbo control for stationary vehicles

A method for advising a motor vehicle operator of the need to change the lubricating oil in a direct or an indirect injection diesel engine. The rate of degradation of the engine oil is determined from monitoring engine revolutions, engine oil temperature and engine oil contamination content. At the start of service after an oil change has occurred, a value corresponding to the maximum allowed number of engine revolutions for the useful life of the oil is stored in the memory of the vehicle's computer. Periodically during each period of vehicle operation, an effective engine revolutions value is determined in relation to the product of measured engine revolutions, an engine oil temperature dependent penalty factor and an oil contaminant content dependent penalty factor. The penalty factors increase the effective engine revolutions value to compensate for engine operating conditions that tend to cause increased degradation of the engine oil. The effective engine revolutions value is subtracted from the stored maximum number of engine revolutions resulting in a remaining allowed revolutions value. Each time the effective engine revolutions value is calculated and subtracted from the remaining allowed engine revolutions value, a new remaining allowed revolutions value is stored in memory, replacing the old value. When the stored remaining allowed revolutions value is decreased below a predetermined threshold value indicating the end of the oil's useful life, an indicator advising the operator that the engine oil needs to be changed is activated.

Oil life monitor for diesel engines

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Haslett, MI, United States of America

Scott John Fletcher