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:
Jan. 07, 1997
Filed:
Jan. 24, 1992
Applicant:
Inventors:
Benjamin J Bradshaw, West Midlands, GB;
Michael Holmes, West Midlands, GB;
Russell W Jones, Stratford-on-Avon, GB;
Assignee:
Lucas Industries Public Limited Company, West Midlands, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ; G06F / ;
U.S. Cl.
CPC ...
36443108 ; 731173 ; 123436 ;
Abstract
Variations in the speed of an internal combustion engine are measured and the distribution of the variations is analyzed for asymmetry, which indicates engine misfire. A threshold is generated as a function of engine speed increases and compared with engine speed decreases to detect asymmetry in the distribution.