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:
Oct. 21, 2008
Filed:
Jan. 12, 2007
Eugene V. Ripley, Russiaville, IN (US);
Eugene V. Ripley, Russiaville, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Pressure-based combustion parameters of an IC engine are determined based on engine cylinder pressure measurements and crank angle dependent cylinder volume data, where the pressure in a given engine cylinder is periodically sampled at scheduled crank angles to provide a measurement resolution that varies over the combustion cycle for that cylinder, and the cylinder volume data is retrieved from a table of pre-calculated data. The combustion parameter calculations are customized to suit the variable resolution pressure data, and the crank angles used to retrieve the pre-calculated cylinder volume data are offset from the scheduled crank angles to compensate for misalignment of the pressure measurements relative to the scheduled engine crank angles.