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:
Nov. 10, 2009
Filed:
Sep. 07, 2007
Mahito Shikama, Wako, JP;
Toshinori Tsukamoto, Wako, JP;
Mahito Shikama, Wako, JP;
Toshinori Tsukamoto, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An angular speed detecting apparatus for a crankshaft of an internal combustion engine. The angular speed detecting apparatus detects a rotational angular speed of the crankshaft based on an output of a pulse generator which generates a crank pulse at every predetermined rotational angle of the crankshaft. An average value of a speed parameter indicating a rotational angular speed of the crankshaft is calculated using the data sampled at intervals of 720/N degrees where N is a number of cylinders of the engine. A learning correction coefficient for correcting the speed parameter is calculated according to the average value. The speed parameter is corrected using the learning correction coefficient.