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:
Aug. 16, 2022
Filed:
Jan. 22, 2021
Keihin Corporation, Tokyo, JP;
Hitachi Astemo, Ltd., Ibaraki, JP;
Abstract
An electromagnetic fuel injection valve includes: a valve body having a rod connected to a valve part; a movable core fitted onto the rod slidably between valve-open side and valve-closed side stoppers; a fixed core having an attracting face opposing the movable core; a valve spring urging the valve body in a valve-closing direction; and an auxiliary spring exhibiting a spring force making the movable core abut against the valve-closed side stopper when a coil is unenergized. A surface, opposing the movable core, of the valve-closed side stopper includes: an annular first curved face part curved convexly toward the movable core and capable of abutting thereagainst; and first and second taper faces continuous respectively to inner and outer peripheral sides of the first curved face part and gradually separated from the movable core in going radially inward and outward, respectively, from the first curved face part.