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:
Sep. 30, 2025
Filed:
Feb. 05, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Provided is a prestroke adjustment method for a fuel injection valve capable of reducing variations in a prestroke amount regardless of the level of machining accuracy of a component. The prestroke adjustment method adjusts a prestroke amount Dof a fuel injection valveincluding a gap forming memberthat forms a gap Gdefining a prestroke between a valve memberand engagement portionsandof a movable coreby a second portionabutting on the movable corein a state where a first portionis positioned at a reference positionof the valve memberIn the prestroke adjustment method, a load L in the direction from the first portiontoward the reference positionof the valve memberis applied to the gap forming memberassembled to the valve memberto plastically deform the gap forming memberthereby shortening the relative length between the first portionand the second portionand setting the prestroke amount Dto the target value T