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. 31, 2004
Filed:
Apr. 08, 2002
John F. Wright, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
A system for estimating peak cylinder pressure in an internal combustion engine includes a pressure sensor producing a pressure signal indicative of pressure within an intake manifold of the engine, a temperature sensor producing a temperature signal indicative of temperature within the intake manifold, means for determining a charge fuel ratio corresponding to a ratio of in-cylinder trapped charge mass and in-cylinder trapped fuel mass, and a control computer determining a start-of-injection value corresponding to a start of fuel injection into the engine. The control computer is operable to estimate peak cylinder pressure as a function of the pressure signal, the temperature signal, the charge fuel ratio and the start-of-injection value.