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:
Sep. 28, 2004
Filed:
Jan. 28, 2003
Tomokazu Makino, Tokyo, JP;
Shiro Yonezawa, Tokyo, JP;
Eiji Kanazawa, Tokyo, JP;
Takuo Watanuki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A cylinder identifying system for detecting reference position on a per cylinder basis with high accuracy and reliability independently of rotation states of an engine includes a means ( ) for generating a plurality of crank angle pulses during rotation of a crankshaft ( ), a means ( ) for generating cylinder identifying pulses during rotation of a cam shaft ( ), a means ( ) for detecting reference positions on the basis of the crank angle pulses, a means ( ) for setting cylinder identifying intervals with reference to the reference positions, a means ( ) for identifying cylinders on the basis of the cylinder identifying pulse signals in the cylinder identifying intervals, and a means ( ) for detecting low and high rotation speed ranges of the engine ( ). Procedures of first and second performance specifications corresponding to low and high engine rotation speed ranges are changed over in dependence on the engine operation states.