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:
Dec. 23, 2008
Filed:
Jan. 29, 2007
Kevin P. Duffy, Metamora, IL (US);
Andrew J. Kieser, Morton, IL (US);
Michael P. Liechty, Chillicothe, IL (US);
William L. Hardy, Peoria, IL (US);
Anthony Rodman, Chillicothe, IL (US);
Carl-anders Hergart, Peoria, IL (US);
Kevin P. Duffy, Metamora, IL (US);
Andrew J. Kieser, Morton, IL (US);
Michael P. Liechty, Chillicothe, IL (US);
William L. Hardy, Peoria, IL (US);
Anthony Rodman, Chillicothe, IL (US);
Carl-Anders Hergart, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic engine controller. This provides the engine controller with a look up table of what compression ratio and exhaust gas rates should be at each speed and load. The engine controller also balances at least one of combustion phasing and energy release among a plurality of cylinders in order to enable higher load operation.