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:
Aug. 04, 1998
Filed:
Jun. 11, 1997
Hiroaki Muramatsu, Toyota, JP;
Isao Matsumoto, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An intake system for an internal combustion engine is disclosed. The intake system comprises a cylindrical member, a first intake passage portion which extends axially within the cylindrical member, two side walls which extend circumferentially on the outer side of the cylindrical wall of the cylindrical member and which are spaced apart from each other in the axial direction of the cylindrical member, a second intake passage portion downstream of the first intake passage portion which is formed between two side surfaces, facing each other, of the two side wall, and an opening formed on the cylindrical wall of the cylindrical member to communicate the first intake passage with the second intake passage. The cylindrical member with the opening is turned to vary the effective length of the second intake passage portion. A distance between the two side surfaces of the two side walls varies such that the longer the effective length of the second intake passage portion becomes by the turning motion of the cylindrical member, the shorter the distance becomes.