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:
Feb. 06, 2001
Filed:
Dec. 28, 1998
Nissan Motor Co., Ltd., Kanagawa-Ken, JP;
Abstract
A front exhaust pipe is connected to a front engine block, and a rear exhaust pipe is connected to a rear engine block. The front exhaust pipe extends from the front engine block downward, and curves and extends rearward. The rear exhaust pipe includes an upstream portion extending downward from a rear portion of the engine and a downstream portion extending forward from a lower end of the upstream portion and curving rearward. Rear ends of the front and rear exhaust pipes are joined together and connected to a main exhaust pipe. The rear and front exhaust pipe have substantially the same length. Therefore, vibration due to a difference between natural frequencies of front and rear exhaust pipes is reduced, and sound vibration performance is enhanced. Further, a declination of output due to disorder of exhaust pulsation in the confluence portion of the front and rear exhaust pipes is avoided.