公开(公告)号：US20200291910A1

公开(公告)日：2020-09-17

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).

公开(公告)号：US20210239081A1

公开(公告)日：2021-08-05

申请号：US15734482

申请日：2019-08-08

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Takuya WATAI ,  Takao MIYAKE ,  Masashi SUGAYA ,  Yasuo NAMAIZAWA

IPC: F02M61/18 ,  F02M61/04 ,  F02M51/06 ,  F02M61/20

Abstract: Provided is a fuel injection valve capable of improving durability as compared with the conventional case and making the amount of fuel injected uniform as compared with the conventional case. Further, the present invention provides a fuel injection valve capable of injecting fuel with a high fuel pressure as compared with the conventional case and improving the reliability of the product as compared with the conventional case. For this reason, the configuration has a shape relationship in which φB>φC>φD>φE>φF is satisfied where φB represents a hole diameter of a valve body insertion hole 31 consisting of the through hole formed in the central axis of a movable core 30, φC represents an outer diameter of an intermediate portion 22, of a valve body 20, that slides on a valve body insertion hole (through hole) 31, φD represents a diameter of an inner peripheral face 121 of a front end member 12 having an injection hole 11 that slides on a front end side (downstream side) spherical portion 230 of the valve body 20, φE represents an outermost diameter (sphere diameter) of a front end side (downstream side) spherical portion 230 of the valve body 20, and φF represents an outer diameter of a neck 223, the smallest diameter portion, which is located toward the rear end (upstream) relative to the front end side (downstream side) spherical portion 230 of the valve body 20 and located at the intermediate portion 22 of the valve body 20, and a side face of the movable core 30 and the inner peripheral face of the nozzle body 10 are not in contact with each other.

公开(公告)号：US20210102520A1

公开(公告)日：2021-04-08

申请号：US16971081

申请日：2019-01-24

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Akiyasu MIYAMOTO ,  Masashi SUGAYA ,  Yasuo NAMAIZAWA ,  Takuya WATAI

IPC: F02M51/06 ,  F02M61/16

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.

公开(公告)号：US20190040790A1

公开(公告)日：2019-02-07

申请号：US16075027

申请日：2017-01-10

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Ryo KUSAKABE ,  Takuya WATAI ,  Shirou YAMAOKA ,  Kiyotaka OGURA

IPC: F02B23/10 ,  F02M61/18 ,  F02B17/00

Abstract: An object of the present invention is to provide a fuel injection device in which fuel sprays hardly adhere to an intake valve, a wall surface in an engine cylinder, or a piston.In a fuel injection device including a valve body 114 and a seat surface 601 to perform injection and sealing of fuel cooperatively and a plurality of injection holes 501 and 502 of which inlet opening surfaces are formed on the seat surface 601, a first injection hole 501 and a second injection hole 501 and 502 arranged closest to the first injection hole 501, which configure the plurality of injection holes 501 and 502, are configured such that the first injection hole 501 is larger than the second injection hole 502 in an injection hole angle to be an angle formed by a normal direction 601a of the seat surface 601 and a center axis 119a of the injection hole (θ1>θ2) and the second injection hole 502 is larger than the first injection hole 501 in an area of a cross-section perpendicular to the center axis 119a of the injection hole (injection hole diameter Da2>injection hole diameter Da1).