International Engine Intellectual Property Company, LLC

Gm Global Technolgoy Operations, Inc.

Electro-motive Diesel, Inc.

David Corba

Paul Gottemoller

Michael B Goetzke

John R Zagone

Ramesh B Poola

Wojciech T Pierga

Jerry Van Polen

Richard Wayne Tupek

Richard J Lill

Donald E Meyer

Hassan Z Hannon

A method of bypassing an intercooler () for an engine () includes the step of detecting () an idle condition for an engine (). based on engine speed and load, air is induced () to bypass an intercooler () for the engine () such that air is input to an intake manifold () of the engine () through an intercooler bypass () that excludes the intercooler (). Improved engine performance on vehicle launch and reduced emissions result.

Intercooler bypass

A system for a turbocharged internal combustion engine includes an engine having a charge inlet connected to the compressor outlet and an exhaust outlet connected to the turbine inlet for driving the turbocharger with hot exhaust gas and supplying compressed air to the engine for combustion. A bypass duct connects the compressor outlet to the turbine inlet for diverting a portion of the compressed air around the engine to the turbine inlet or exhaust. A control device selectively controls the diversion of air. An operating method for the system involves controlling peak cylinder firing pressure and/or maximum turbine inlet temperature, optionally with exhaust NOx and smoke in order to limit these variables to acceptable limits with a minimum of operational limitations.

Method for engine condition control with turbocompressor controllable bypass

An apparatus for and method of providing improved engine performance during a change in engine load conditions reduces or eliminates engine stumbling or hesitation and/or reduces emissions levels. When an engine load change is detected (), a compensation factor for fuel injection timing is determined () and combined with a base timing for fuel injection, thereby altering fuel injector timing during the transition period.

Fuel injection timing compensation based on engine load

Ignition delay in a diesel engine is reduced or eliminated by a fuel injector or igniter nozzle which includes energy supplying fuel conditioning means at the point of fuel injection into a cylinder. A preferred embodiment includes an electrically-conductive injection valve reciprocable in a conductive nozzle body and seatable on a valve seat to stop fuel flow through nozzle orifices. The injection valve is electrically insulated from the body except at its contact with the valve seat and is connected to an electrical charge, at least during opening of the valve. An electrical spark discharge is thus generated between the injection valve and the valve seat upon opening of the valve. Initially injected fuel passes through the arc and is conditioned by the spark energy to ignite almost immediately by compression ignition upon entering the engine cylinder and thus essentially eliminate diesel ignition delay.

Diesel injection igniter and method

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Des Plaines, IL, United States of America

David Corba