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:
Apr. 17, 2007
Filed:
Mar. 04, 2005
Masaaki Kubo, Yokohama, JP;
Toru Noda, Yokohama, JP;
Isamu Hotta, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
An internal combustion engine includes a main combustion chamber and a small auxiliary combustion chamber. The main chamber is formed by a cylinder, the undersurface of a cylinder head, and the crown of a piston. A main ignition unit is disposed in the cylinder head, including a main body and a spark plug. The auxiliary chamber is formed within the main ignition unit. The main and auxiliary chambers are connected via a communication passage. The piston crown includes a cavity. When a fuel injection valve sprays fuel into the cavity on compression stroke, a tumble flow of fuel gas is generated to locally form a relatively rich air-fuel mixture near the communication passage. The air-fuel mixture partly flows into the auxiliary chamber as the piston travels upwardly. The air-fuel mixture in the auxiliary chamber is ignited by the spark plug so that a combustion flame propagates into the main chamber.