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. 01, 1981
Filed:
Aug. 30, 1979
Applicant:
Inventor:
Takamitsu Okamoto, Toyota, JP;
Assignee:
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
1231 / ; 123 / ;
Abstract
An intake system of an internal combustion engine having a helically-shaped intake port comprising a substantially straight inlet passage portion and a helical portion. The intake manifold comprises substantially straight manifold branches, each being connected to the corresponding inlet passage portion. The ratio of the sum of the length of the inlet passage portion and the length of the manifold branch to the cross-sectional area of the inlet open end of the inlet passage portion is greater than 0.7 cm.sup.-1.