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:
Mar. 09, 2010
Filed:
Sep. 11, 2007
Mamoru Hasegawa, Saitama-ken, JP;
Satoshi Yamaguchi, Saitama-ken, JP;
Hideki Sakamoto, Saitama-ken, JP;
Naoto Kitayama, Saitama-ken, JP;
Tatsuo Yamanaka, Saitama-ken, JP;
Mamoru Hasegawa, Saitama-ken, JP;
Satoshi Yamaguchi, Saitama-ken, JP;
Hideki Sakamoto, Saitama-ken, JP;
Naoto Kitayama, Saitama-ken, JP;
Tatsuo Yamanaka, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for an internal combustion engine, which is capable of estimating a property of fuel accurately even when the engine is in an operating condition other than idling. An in-cylinder pressure sensor detects an amount of change in pressure in a cylinder #of the engine as a pressure change amount. An ECU calculates an amount of heat released in the cylinder #as a heat release amount, according to the pressure change amount. A vehicle speed sensor, a crank angle sensor, and an accelerator pedal opening sensor detect load on the engine. The ECU estimates a cetane number of fuel based on the calculated heat release amount and the detected load on the engine.