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:
Sep. 13, 1988
Filed:
May. 28, 1987
Hideki Tanaka, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
A combustion chamber is defined by a cylinder having an upper wall surface shaped like a pent-roof and a piston provided on the head portion thereof with a bulged portion conforming to the upper wall surface in shape. A semi-spherical first bowl portion is formed substantially at the center of the bulged portion, and a pair of second bowl portions are formed in the bulged portion to respectively extend on opposite sides of the first bowl portion to the corresponding ends of the bulged portion of the piston along the edge of the bulged portion and to be communicated with the first bowl portion. A swirl generating mechanism is provided to generate a swirl of intake air in the combustion chamber when the engine load is light, and a spark plug is disposed to substantially face the center of the first bowl portion from the upper wall surface.