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:
Dec. 25, 2001
Filed:
Jun. 25, 1999
Applicant:
Inventors:
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P 3/00 ; G06F 1/500 ;
U.S. Cl.
CPC ...
G01P 3/00 ; G06F 1/500 ;
Abstract
To provide an engine speed calculation apparatus which can facilitate calculation processing of the engine speed without being influenced by pulsation rotation in a low speed region of an engine. In a low speed region of an engine, a predetermined value is divided by a time required for rotation over an angle equal to a plurality of times of a predetermined angle to calculate the engine speed, but in a high speed region of the engine in which pulsation occurs less likely, the predetermined value is divided by the value equal to the plurality of times of the time required for rotation over the predetermined angle to calculate the engine speed.