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:
Sep. 22, 2015
Filed:
Mar. 08, 2011
Applicants:
Morena Bruno, Chivasso, IT;
Davide Donna, Novara, IT;
Roberto Argolini, Milan, IT;
Inventors:
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 15/00 (2006.01); F01M 1/08 (2006.01); F01P 3/06 (2006.01);
U.S. Cl.
CPC ...
F01M 1/08 (2013.01); F01P 3/06 (2013.01); F16N 2250/04 (2013.01); F16N 2260/02 (2013.01);
Abstract
A method is provided to diagnose a failure of an OPCJ valve of an internal combustion engine. The OPCJ valve is located in an auxiliary line connecting an engine lubrication line to at least an oil jet for squirting lubricating oil from the engine lubrication line towards a piston surface. The method provides for monitoring the pressure variation in the engine lubrication line due to a switching signal sent to the OPCJ valve.