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:
Jul. 18, 2000
Filed:
Jun. 26, 1997
Applicant:
Inventor:
Chao Fu Daniels, Ypsilanti, MI (US);
Assignee:
Cooper Automotive Products, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 3508 ; 73 3503 ;
Abstract
Mass fraction burned in a cylinder of an internal combustion engine is determined by measuring an ion signal across a gap of a spark plug and identifying an inflection point of the ion signal. The mass fraction burned is determined using an expression that includes a constant. A value for the constant is determined using the inflection point of the ion signal, and the mass fraction burned is determined using the expression and the constant.