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:
Mar. 11, 2003
Filed:
Jul. 10, 2002
Yoichi Yanagii, Kawasaki, JP;
Keihin Corporation, Tokyo, JP;
Abstract
To provide a tandem valve type throttle body in which a closing direction of a second throttle valve is not restricted to one side, can an intake efficiency can be improved, and an entire length of a throttle body can be reduced, a butterfly type first throttle valve ( ) is attached to a first throttle valve shaft ( ) and operated by an accelerator, a butterfly type second throttle valve ( ) is disposed in an upstream side of the first throttle valve ( ) and attached to a second throttle valve shaft ( ), the second throttle valve ( ) is formed in an always open type and operated so as to be closed by an electromagnetic actuator, an axial pitch (P) between the first throttle valve shaft ( ) and the second throttle valve shaft ( ) is twice a radius (R) of the throttle valve ( ) or less, and a notch portion ( B) is formed in the second throttle valve ( ) in correspondence to an interference portion on planes of both the throttle valves ( ) at a time of fully opening both the throttle valves ( ).