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. 13, 2016
Filed:
Mar. 15, 2013
GM Global Technology Operations Llc, Detroit, MI (US);
Wajdi B. Hamama, Whitmore Lake, MI (US);
Craig M. Sawdon, Williamston, MI (US);
Kevin M. Luchansky, Sterling Heights, MI (US);
James R. Reeder, Jr., Howell, MI (US);
Frank Garthoff, Bad Duerkheim, DE;
Christian Mueller, Brucken, DE;
Jessica A. Carroll, Cheltenham, AU;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method includes: generating an indicator of present operating conditions of an engine; determining a first amount of noise based on vibration measured during a first plurality of combustion events of a cylinder; storing the first amount of noise and a first value of the indicator in a mapping based on a first engine speed and a first engine load; determining the first value of the indicator from the mapping based on a second engine speed and a second engine load; generating a trigger signal when the first value is different than a second value of the indicator; and, when the trigger signal is generated: determining a second amount of noise based on vibration measured during a second plurality of combustion events of the cylinder; and replacing the first amount of noise and the first value in the mapping with the second amount of noise and the second value.