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:
Mar. 27, 2001
Filed:
Oct. 13, 1999
Yoshitaka Uematsu, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
An engine control system checks for a misfire from a change in the rotation speed of an engine. A rotation interrupt routine is executed every 30° angular rotation of an engine crankshaft to calculate and store only the rotation speed. In one of a plurality of time interrupt routines which are executed every predetermined respective time intervals, a change in the stored rotation speed is calculated to check for a misfire of the engine. The time interrupt routines have different execution priorities which are lower than that of the rotation interrupt routine. The time interrupt routine for checking the misfire has a non-highest execution priority among the time interrupt routines so that engine control processing such as fuel injection and ignition may be executed in another of the time interrupt routines having its execution priority lower than that of the time interrupt routine for checking the misfire.