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. 26, 1989
Filed:
Nov. 17, 1987
Chiaki Kumagai, Tokorozawa, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An engine stroke discriminating method and apparatus for a 4-cycle internal combustion engine which discriminates a stroke of the engine with accuracy, the method and apparatus being simple in construction and low in cost. The stroke discriminating method and apparatus is characterized by taking advantage of the fact that the rotational speed of a crankshaft after the top dead center of a cylinder of an engine rises substantially relative to that before the top dead center in a compression stroke of the cylinder but does not rise in an exhaust stroke. The stroke of the engine is thus, discriminated by determining the difference in rotational speed of the crankshaft before and after the top dead center of the cylinder.