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:
Oct. 08, 2019
Filed:
Nov. 02, 2015
Denso Corporation, Kariya, Aichi-pref., JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A current control unit in a fuel injection device controls a magnitude of a current flowing through a coil during single energization. A current Ipflows once a signal input to the current control unit is turned ON at time t. As a result, a movable core and a needle abut against each other with a lift amount increased at time t, and then the needle is separated from a valve seat and pre-injection is performed. At time t, which follows the pre-injection, the needle and movable core lift amount becomes a lift amount Dat a time when the needle and the valve seat abut against each other, and temporary valve closing occurs. At time t, which follows time t, currents Ixand Imlarger than the current Ipare caused to flow through the coil, and then main injection is performed with the needle and movable core lift amount turned into a lift amount Dlarger than the lift amount D. Therefore, fuel injection can be performed twice during the single energization.