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:
Jan. 21, 2003
Filed:
Jun. 07, 2001
Hiroshi Miyakubo, Kanagawa, JP;
Akihiro Iiyama, Kanagawa, JP;
Tsuyoshi Taniyama, Kanagawa, JP;
Koudai Yoshizawa, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An internal combustion engine is operated on auto-ignition combustion of fuel with low cetane number like gasoline. The engine has at least one cylinder and a reciprocating piston in the cylinder to define a combustion chamber. Combustion event in the cylinder is expressed in terms of two variables. They are main combustion timing (&thgr; ) and a main combustion period (&thgr; - ). The main combustion timing (&thgr; ) represents a crank position when mass burnt rate is 50 percent. The main combustion period (&thgr; - ) represents a period from a crank position when mass burnt is 20 percent to a crank position when mass burnt is 50 percent. Controlled parameters governing main combustion are varied to adjust the main combustion timing on an advance side of a retard limit (&thgr; max) and to adjust the main combustion period within a range between an upper limit (&thgr; - max) and a lower limit (&thgr; - min).