The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2001
Filed:
Nov. 03, 1998
Applicant:
Inventors:
Shinji Kamimaru, Tokyo, JP;
Mitsunori Ishii, Tokyo, JP;
Assignee:
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 9/04 ;
U.S. Cl.
CPC ...
F01L 9/04 ;
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.