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:
Oct. 15, 1991
Filed:
Jun. 04, 1990
Applicant:
Inventors:
Toshikazu Kurokawa, Hiroshima, JP;
Hiroshi Sumimoto, Hiroshima, JP;
Takashiga Tokushima, Hiroshima, JP;
Tadao Suemori, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123 / ; 123 / ;
Abstract
A four cycle, 12-cylinder engine includes four cylinder groups each having three cylinders located adjacent to each other. The cylinders in each cylinder group have intake strokes which are apart one from another by 240.degree. in terms of angle of rotation of the engine crankshaft. The cylinders in each cylinder group are connected through respective branch intake passages with a common intake passage. Means is provided for separating the common intake passage of one cylinder group from the common intake passage of another cylinder group.