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. 16, 2004
Filed:
Sep. 19, 2002
Yuuichi Iriya, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
By setting the configuration of a cavity ( ) of a piston ( ) appropriately, tumble is produced in air that is aspirated into a combustion chamber ( ) inside a cylinder ( ) from an intake port ( ), and by means of this tumble, the spray of fuel injected by a fuel injector ( ) is caused to gather around the periphery of a spark plug ( ). A predetermined tumble in the form of an upright ellipse is set in the longitudinal cross section of the cylinder ( ) which includes an injection point (I) of the fuel injector ( ) and an ignition point (T) of the spark plug ( ). The bottom surface ( ) of the cavity ( ) is curved so as to conform to the radius of curvature (R ) of the lower end of the elliptical tumble, thereby advancing the formation of elliptical tumble which is unlikely to interfere with the cylinder wall surfaces.