Gm Global Technolgoy Operations, Inc.

Mark L DeJong

Jamison C Schroeder

Paul W Kelley

Jeffrey Johnson

Thomas L Bahensky

Scott John Fletcher

Brent M Chamberlain

James S Baumgartner

Jose Deleon

Jose L DeLeon

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

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Ann Arbor, MI, United States of America

Mark L DeJong