Caterpillar Inc.

Charles J Kocian

Edward H Betts, Jr

Gregg W Uhland

James B Maddock

Phillip J Houtz

John L Johnson

Robert L Weber

David J Doddek

Shawn J Weck

Mitchel Ryan Deckard

Kevin A Lantz

David L Frohberg

David M Erickson

Marshall T Kolb

A method for controlling an engine turbocharger having a wastegate control valve is provided where the turbocharger is controlled by an electronic controller which is capable of delivering a wastegate control signal to the wastegate control valve. A determination is made as to whether an engine speed falls within a predetermined speed range defined by a first predetermined speed and a second predetermined speed, where the second predetermined speed is higher than the first predetermined speed. A predetermined initializing wastegate control signal may be delivered to the wastegate control valve in response to the engine speed falling within the predetermined speed range. A determination is made as to whether an engine speed exceeds the second predetermined speed, and a determination is made as to whether an engine load falls within a predetermined load range defined by a first predetermined load and a second predetermined load, where the second predetermined load is greater than the first predetermined load. A stored control signal value is retrieved from memory associated with the electronic controller and a wastegate control signal corresponding thereto is delivered to the wastegate control valve in response to the engine speed exceeding the second predetermined speed and the engine load falling within the predetermined load range. The stored control signal value may be updated with a learned control signal value determined during certain engine operating conditions.

Apparatus and method for utilizing a learned wastegate control signal

An apparatus and method for reducing white smoke during start up of a compression ignition engine is disclosed. The apparatus includes an engine cylinder, a fuel injector, an engine speed sensor, and a microprocessor. The microprocessor preferably includes an engine speed controller that governs the engine speed to a desired value. The microprocessor issues a first fueling level corresponding to a difference between an actual engine speed and the desired engine speed signal. The microprocessor quits fueling the engine cylinder then determines a second fueling level. A determination about whether the cylinder is firing is then based on a comparison between the first and the second fueling level.

White smoke reduction apparatus and method

The present invention relates generally to an engine control system, and more particularly to an engine control system that decreases the amount of waste oil that must be disposed of in an internal combustion engine by automatically burning spent oil based upon engine speed.

Apparatus and method for burning spent lubricating oil in an internal

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Peoria, IL, United States of America

Charles J Kocian