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:
Nov. 20, 2001
Filed:
Oct. 13, 2000
Yoshiki Ito, Nagoya, JP;
Katsuhiro Asami, Chiryu, JP;
Aisan Kogyo Kabushiki Kaisha, , JP;
Abstract
A throttle valve control apparatus includes a throttle valve, a DC torque motor for driving the throttle valve, the DC torque motor including a stator with coil wound therearound, and a needle including permanent magnets, the needle being rocked within a predetermined working angle range, wherein a magnetic path is formed within the stator, and a magnetic flux quantity is generated within the stator when current flows in the permanent magnets and the coil, wherein a magnetic flux is not saturated while the working angle of the needle is in a repulsion region where the needle repulses the stator and the magnetic flux is saturated while the working angle of the needle is in an attraction region where the needle is attracted to the stator, a throttle opening sensor for outputting information regarding an opening of the throttle valve, and a controller which controls the dc torque motor when receiving signals from the throttle opening sensor.