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:
Aug. 10, 1999
Filed:
May. 27, 1997
Applicant:
Inventor:
John R Jaye, Northville, MI (US);
Assignee:
Chrysler Corporation, Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ; F02D / ;
U.S. Cl.
CPC ...
701104 ; 731173 ; 7311 / ; 123480 ; 701103 ; 701109 ;
Abstract
A method is provided for determining wall wetting for an engine which includes running a multi-cylinder engine at a predetermined speed and load. The fuel delivery and spark to one of the cylinders is then interrupted. The hydrocarbon level exhausted from the cylinder is then measured for a predetermined number of engine cycles. The test results can then be curve fitted to the relationship HCPPM=(A+B* engine cycle).sup.(1/exp). In this relationship, HCPPM is the hydrocarbon count in parts per million, A and B are each constants, and the exponent exp is derived using an iterative process. The exponent which is derived is the main qualifier for wall wetting.