Gm Global Technolgoy Operations, Inc.

Phillip B McGrath

Kenneth J Buslepp

David R Staley

Su-Chee Simon Wang

Han-Sheng Lee

Adjustment to the lubrication rate for a period of time after startup of a two-stroke internal combustion engine, wherein the magnitude of the adjustment over the period of time is determined from an estimate of the degree the lubricant has receded from the moving parts of the engine exposing the moving parts to an elevated potential for wear, and from an estimate of the rate at which lubricant in the engine may be recirculated to the moving parts to reduce the elevated potential.

Two-stroke engine lubrication

Disclosed is an oil sensor system having an oil sensor including two spaced apart electrodes, a triangular waveform means, a comparison means and a signal means. The oil system is used in situ (i.e., used directly in the engine) to determine the presence of two-stroke or four-stroke oil, or the occurrence of an engine malfunction, such as a leakage of antifreeze into the oil.

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Sterling Heights, MI, United States of America

Phillip B McGrath