US Patent:
20030213448, Nov 20, 2003
Inventors:
Richard Holtman - Dunlap IL, US
Scott Leman - Eureka IL, US
Sean Cornell - Gridley IL, US
John Pipis - Bloomington IL, US
Ronald Shinogle - Peoria IL, US
International Classification:
F01L009/02
F01M001/06
Abstract:
A method of calibrating a variable valve actuation system is provided. An engine valve is moved from a first position where the engine valve blocks a flow of fluid to a second position where the engine valve passes a flow of fluid. A valve actuator is actuated to prevent the engine valve from returning to the first position. A signal is transmitted to cause the valve actuator and to allow the engine valve to return to the first position. The return of the engine valve to the first position is determined. A time parameter indicative of an elapsed time between the transmission of the signal and movement of the engine valve to the first position is determined.