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:
May. 26, 2015
Filed:
Feb. 24, 2012
Hiroshi Ito, Tokyo, JP;
Takayuki Abe, Saitama, JP;
Tetsuya Ohno, Tokyo, JP;
Mahito Shikama, Utsunomiya, JP;
Hiroshi Ito, Tokyo, JP;
Takayuki Abe, Saitama, JP;
Tetsuya Ohno, Tokyo, JP;
Mahito Shikama, Utsunomiya, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
According to a method and an apparatus of the present invention for diagnosing a fault of an engine, a cranking rotation state is created by rotating a crank shaft while explosions in each cylinder are stopped; a variation of angular velocity of the crank shaft is detected for each cylinder in the cranking rotation state; a cylinder the compression pressure of which is insufficient is detected based on the variation; and if a cylinder indicated as a misfiring cylinder by a fault code is the same as the cylinder detected as being insufficient in compression pressure in the cranking rotation state, the cylinder is specified.