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公开(公告)号：US09765740B2
公开(公告)日：2017-09-19
申请号：US14374782
申请日：2013-01-16
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Atsushi Takaoku , Yasuo Namaizawa , Hideharu Ehara , Masahiro Soma
CPC classification number: F02M63/0071 , F02M51/061 , F02M51/0671 , F02M61/168 , F02M61/18 , F02M61/1813 , F02M2200/8084 , F02M2200/8092
Abstract: A fuel injection valve is provided that can reduce variations in stroke length by reducing distortion during welding, and consequently can reduce variations in flow rate of injected fuel. The fuel injection valve has a nozzle; a fixed valve that is press-fit into a tip of the nozzle and has a fuel injection port from which the fuel is injected; and a movable element that forms a fuel seal section by abutting against the fixed valve, and opens and closes the fuel injection port. The fixed valve and the nozzle are fixed in place by welding at a position with no space due to press-fitting. A groove that serves as an empty space is provided in a continuation of a welded section that is formed in the fixed valve and the nozzle by the welding.
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公开(公告)号：US11591994B2
公开(公告)日：2023-02-28
申请号：US16652758
申请日：2018-10-31
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Masashi Sugaya , Takao Miyake , Yasuo Namaizawa
Abstract: For a fuel injection device, a configuration to improve fuel sealability when a valve is closed is provided. Therefore, the fuel injection device includes: a valve body that opens and closes a fuel flow path; a movable iron core in which a fuel passage hole communicating an upstream side and a downstream side is formed, and that operates the valve body toward the upstream side; a biasing spring whose one end contacts the movable iron core, and that biases the movable iron core in a valve opening direction; and a regulating unit that regulates movement of the one end of the biasing spring, in which the shortest distance between the one end of the biasing spring and the fuel passage hole is larger than a radial travel distance of the one end until radial movement of the one end is regulated by the regulating unit.
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Patent Agency Ranking
公开(公告)号：US20140367498A1
公开(公告)日：2014-12-18
申请号：US14374782
申请日：2013-01-16
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Atsushi Takaoku , Yasuo Namaizawa , Hideharu Ehara , Masahiro Soma
CPC classification number: F02M63/0071 , F02M51/061 , F02M51/0671 , F02M61/168 , F02M61/18 , F02M61/1813 , F02M2200/8084 , F02M2200/8092
Abstract: A fuel injection valve is provided that can reduce variations in stroke length by reducing distortion during welding, and consequently can reduce variations in flow rate of injected fuel. The fuel injection valve has a nozzle; a fixed valve that is press-fit into a tip of the nozzle and has a fuel injection port from which the fuel is injected; and a movable element that forms a fuel seal section by abutting against the fixed valve, and opens and closes the fuel injection port. The fixed valve and the nozzle are fixed in place by welding at a position with no space due to press-fitting. A groove that serves as an empty space is provided in a continuation of a welded section that is formed in the fixed valve and the nozzle by the welding.
Abstract translation: 提供一种燃料喷射阀，其可以通过减少焊接过程中的变形而减小行程长度的变化，从而可以减少喷射燃料的流量变化。 燃料喷射阀具有喷嘴; 固定阀，其压配合到喷嘴的尖端中，并具有喷射燃料的燃料喷射口; 以及通过抵靠固定阀形成燃料密封部的可动元件，并且打开和关闭燃料喷射口。 固定阀和喷嘴通过在没有空间的位置通过焊接固定就位。 在通过焊接形成在固定阀和喷嘴中的焊接部的延续部中设置有用作空白的槽。
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公开(公告)号：US11242830B2
公开(公告)日：2022-02-08
申请号：US16646785
申请日：2018-09-28
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Akiyasu Miyamoto , Yasuo Namaizawa , Takao Miyake , Takuya Watai
IPC: F02M51/06
Abstract: Provided is a fuel injection valve capable of quickly stopping a position of a movable element at a predetermined position after closing a valve while reducing an impact force of a valve body. Therefore, a valve body 101 includes a sleeve 113. A first movable core 201 (first movable element) lifts the valve body 101 by the attractive force of a magnetic core 107. A second movable core 202 (second movable element) further lifts the valve body 101 by the attractive force of the magnetic core 107 after the first movable core 201 (first movable element) lifts the valve body 101. After the valve body 101 is seated on the seat member 102 and the second movable core 202 (second movable element) is separated from the sleeve 113, a bottom surface 201g of the first movable core 201 (first movable element) collides with a storage bottom surface 111b (collision receiving portion).
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公开(公告)号：US11703021B2
公开(公告)日：2023-07-18
申请号：US17352665
申请日：2021-06-21
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ryo Kusakabe , Motoyuki Abe , Tohru Ishikawa , Noriyuki Maekawa , Masahiro Soma , Takao Miyake , Yasuo Namaizawa
CPC classification number: F02M51/061 , F02M51/0614 , F02M51/0664 , F02M51/0685 , F02M61/16 , F02M47/027 , F02M51/00 , F02M51/02 , F02M51/0621 , F02M51/0628 , F02M51/0635 , H01F7/1638 , H01F7/1646 , H02K3/04
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.
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公开(公告)号：US11629678B2
公开(公告)日：2023-04-18
申请号：US16971081
申请日：2019-01-24
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Akiyasu Miyamoto , Masashi Sugaya , Yasuo Namaizawa , Takuya Watai
Abstract: Provided is a fuel injection valve capable of stroking a valve body in two stages of large and small strokes and improving responsiveness of a valve opening operation. Therefore, a first mover 201 is attracted to a magnetic core 107. A second mover 202 is formed separately from the first mover 201, and is attracted to the magnetic core 107 on an inner diameter side of the first mover 201. A valve body 101 has a flange portion 101a on an upstream side of the second mover 202. A spacer 213 forms a gap (void g1) in an axial direction between the flange portion 101a and the second mover 202 in a valve closed state.
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公开(公告)号：US11313336B2
公开(公告)日：2022-04-26
申请号：US17046847
申请日：2019-02-13
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Takao Miyake , Yasuo Namaizawa , Takumasa Furuyama
Abstract: An object of the present invention is to provide a fluid control device with an improved effect of suppressing blowhole generation. Therefore, a component for a flow rate control device of the present invention includes: a first component 140 (A); a second component 107 (B) fixed to the first component by a press-fitting portion 802; a butt-welded portion 803 connecting the first component and the second component; and a first gap 1001 and a second gap 1002 formed between mutually opposing surfaces of the first component and the second component. The first gap is provided on a side of the press-fitting portion with respect to the second gap between the press-fitting portion and the butt-welded portion, and is formed in a direction intersecting a press-fitting direction. The second gap is provided on a side of the butt-welded portion with respect to the first gap between the press-fitting portion and the welded portion, and is formed in a direction intersecting the first gap.
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