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:
Jun. 01, 2004
Filed:
Apr. 03, 2003
Masaaki Ashida, Yokohama, JP;
Kouichi Mori, Ayase, JP;
Ritsuo Sato, Yokohama, JP;
Yoshinao Ugomori, Isehara, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
The invention comprises at least two independent intake ports connected to a combustion chamber , two intake valves , and two exhaust valves . Upper and lower channels which are defined by a partition wall, and an intake control valve for opening and closing the lower side channel are provided in the interior of the first intake port . An intake control valve for opening and closing the first intake port is also provided. The invention further comprises a controller for controlling the opening and closing of the intake control valves and , and the degree of opening of these intake control valves and is controlled in accordance with the operating conditions.