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:
Feb. 13, 2001
Filed:
Sep. 23, 1999
Applicant:
Inventors:
Brian E. Beechie, Farmington Hills, MI (US);
Gregory L. Ohl, Ann Arbor, MI (US);
James W. Yip, Pinckney, MI (US);
Michael J. Prucka, Lake Orion, MI (US);
Assignee:
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L 3/00 ; G01M 1/500 ;
U.S. Cl.
CPC ...
G01L 3/00 ; G01M 1/500 ;
Abstract
A method for characterizing the friction losses within an internal combustion engine includes determining a start-up friction term, a mechanical friction term, a pumping loss term, and an adapted friction term to compensate for long-term frictional changes in the engine. A total engine frictional loss is determined by summing the start-up friction term, the mechanical friction term, the pumping loss term and the adapted friction term.