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:
Feb. 26, 1991
Filed:
Aug. 16, 1989
Toshiaki Adachi, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A swirl chamber is defined by an approximately spherical cavity formed in a cylinder head of an internal combustion engine with the radius of the swirl chamber being reduced in the direction the swirl flows in the swirl chamber. Therefore, the swirl is accelerated as it flows in the swirl chamber. The swirl chamber communicates with a main combustion chamber formed in a piston top via a passage formed in the cylinder head when the piston is at top dead center, and air in the main combustion chamber is forced into the swirl chamber due to the compression stroke of the piston. The passage is formed in a manner such that it has constant transverse section lengthwise and such that a part of the passage defines a tangential line of the swirl chamber. Therefore, the air forced into the swirl chamber passes through the passage with little friction loss, smoothly enters the swirl chamber and gains velocity in the swirl chamber.