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System for detecting operating errors in a variable valve timing engine using pressure sensors

United States Patent

July 2, 2013
View the Complete Patent at the US Patent & Trademark Office
A method and control module includes a pressure sensor data comparison module that compares measured pressure volume signal segments to ideal pressure volume segments. A valve actuation hardware remedy module performs a hardware remedy in response to comparing the measured pressure volume signal segments to the ideal pressure volume segments when a valve actuation hardware failure is detected.
Wiles; Matthew A. (Royal Oak, MI), Marriott; Craig D. (Clawson, MI)
GM Global Technology Operations LLC (
12/ 703,430
February 10, 2010
STATEMENT OF GOVERNMENT RIGHTS This invention was produced pursuant to U.S. Government Contract No. DE-FC26-05NT42415 with the Department of Energy (DoE). The U.S. Government has certain rights in this invention.