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:
Jul. 18, 2023
Filed:
Jun. 21, 2021
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Ryo Kusakabe, Hitachinaka, JP;
Motoyuki Abe, Mito, JP;
Tohru Ishikawa, Kitaibaraki, JP;
Noriyuki Maekawa, Kashiwa, JP;
Masahiro Soma, Hitachi, JP;
Takao Miyake, Hitachinaka, JP;
Yasuo Namaizawa, Naka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
In a fuel injection device, a driving unit structure has a magnetic aperture, in which an inner diameter is gradually enlarged toward the mover side, provided in an inner peripheral surface of the magnetic core. It is possible to reduce magnetic delay time upon valve opening from the supply of the electric current to the coil to the rise of magnetic flux and magnetic delay time upon valve closing from the stoppage of the electric current to the coil to reduction of magnetic flux, by providing a magnetic aperture in the inner peripheral surface of the magnetic core. Thus it is possible to improve the dynamic responsiveness upon valve opening and valve closing.