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:
Apr. 09, 2002
Filed:
Jul. 12, 2000
Masaki Ikeya, Obu, JP;
Sumito Takeda, Obu, JP;
Aisan Kogyo Kabushiki Kaisha, Aichi-ken, JP;
Abstract
The fuel injection valve of the present invention is constituted such that a needle valve and a movable core are movably disposed in an axial direction in the inside of a body . Here, a fixed member which the movable core approaches at the time of closing the valve is disposed in the body , and a gap is formed between the movable core and the fixed member at the time of closing the valve. When fuel remaining in the gap between the movable core and the fixed member is pressurized according to the movement of the movable core to the valve closing side, a squeezing portion SB is disposed at a portion which constitutes a passage for the fuel extruded from the gap. At the time of closing the valve, a squeezing reaction force (reaction force against the squeezing-out force or pushing-out force generated at the time of pressurizing a liquid and squeezing a liquid through the gap) is generated on the movable core . Since the squeezing reaction force is increased in an inversely proportional manner to the cube of the size of the gap between the movable core and the fixed member , even when the gap between two opposing surface (that is, the gap between the proximal end surface of the fixed member and the distal end surface of the movable core ) is small, a large squeezing reaction force is generated. Further, a braking is quickly applied to the movable core and and the needle valve due to this squeezing reaction force just slightly before the point of time when the valve is closed.