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. 22, 2011
Filed:
Feb. 08, 2007
Tadao Tsuchiya, Miyagi, JP;
Koji Sonoda, Miyagi, JP;
Manabu Shoji, Miyagi, JP;
Keihin Corporation, Tokyo, JP;
Abstract
A fuel injection valve is provided that includes an electromagnetic actuator (A) that moves a valve body () in an inwardly-opening direction, and a magnetostrictive actuator (A) that, by passing current therethrough, elongates a movable part assembly () extending from the valve body () to a movable core () of the electromagnetic actuator (A), wherein the magnetostrictive actuator (A) is formed from a solid magnetostrictive element () provided between the valve body () and the movable core () of the electromagnetic actuator (A) so as to couple the valve body () and the movable core (), a preload spring () provided between the valve body () and the movable core () so as to apply a compressive preload in the axial direction of the valve body () to the magnetostrictive element (), and a second coil () mounted on a valve housing (H) housing the valve body (), the movable core (), the magnetostrictive element (), and the preload spring (), the second coil () elongating the magnetostrictive element () against the preload by the passage of current. By combining in this way the electromagnetic actuator and the magnetostrictive actuator equipped with the solid magnetostrictive element, a fuel injection valve of an inwardly-opening type that has good responsiveness and is capable of operating at low power consumption can be provided.