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:
Feb. 20, 2007
Filed:
Oct. 13, 2005
Applicants:
Kazunari Izumi, Obu, JP;
Haruyuki Urushihata, Chiryu, JP;
Inventors:
Kazunari Izumi, Obu, JP;
Haruyuki Urushihata, Chiryu, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01); F02D 13/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An ECU calculates an engine speed for calculating a camshaft phase based on a time period Tθ in which a crankshaft rotates a sampling angle θ. The camshaft phase is derived from a time difference between output timing of a cam angle signal and output timing of a crank angle signal based on the engine speed. According as the engine speed is lower, the sampling angle θ becomes small, so that the engine speed and the camshaft phase are precisely calculated.