Patent Number: 6,167,852

Title: Vale opening and closing time detecting apparatus and method thereof for electromagnetically operated valve mechanism in internal combustion engine

Abstract: A valve opening and closing time detecting apparatus and method of an elecromagnetically operated valve in an internal combustion engine comprises a vibration detecting means for detecting a vibration generated when the valve reaches a fully open position or when the valve reaches a valve seated position and a judging means for comparing a comparison data obtained from the vibration detecting means with a threshold value and for judging that the valve has reached the open position or the seated position when the comparison data exceeds the threshold value.

Inventors: Kamimaru; Shinji (Tokyo, JP), Ishii; Mitsunori (Tokyo, JP)

Assignee: Fuji Jukogyo Kabushiki Kaisha

International Classification: F01L 1/00 (20060101); F01L 9/04 (20060101); F01L 1/46 (20060101); F01L 009/04 ()

Expiration Date: 01/02/2018