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. 27, 2001
Filed:
Nov. 02, 1999
Motor-operated flow control valve and gas recirculation control valve for internal combustion engine
Youichi Watanabe, Hitachinaka, JP;
Yasuyuki Nakano, Ibaraki-ken, JP;
Masayuki Suganami, Hitachinaka, JP;
Kzunori Irifune, Hitachinaka, JP;
Other;
Abstract
Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (,) is reciprocated with rotating motion of a motor (,), whereupon a valve head (,) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (,) of the motor (,) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (,) comprises an integral magnet (,), a single ball bearing (,) and a resin-made magnet holder (,) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (,) of the ball bearing (,) is held at its one end against an inner peripheral wall of a housing resin (,) and a preload is applied to the other end of the outer race (,).