公开(公告)号：US20200224620A1

公开(公告)日：2020-07-16

申请号：US16830839

申请日：2020-03-26

Applicant: DENSO CORPORATION

Inventor： Kouichi MOCHIZUKI ,  Atsuya OKAMOTO ,  Shinsuke YAMAMOTO ,  Yuki WATANABE

IPC: F02M51/06 ,  B05B1/30

Abstract: A fuel injection valve includes a valve body, a fixed core, a movable core, a spring and a cup. The movable core has a first core contact surface which contacts the valve body when the movable core is moved by a predetermined distance away from a nozzle hole, and a second core contact surface which contacts the cup when the movable core is moved away from the nozzle hole. The movable core, the cup and the valve body form a fuel storage chamber which is surrounded by the movable core, the cup and the valve body to accumulate fuel. The first core contact surface is located inside the fuel storage chamber. The first core contact surface and the second core contact surface have a communication groove through which the inside and the outside of the fuel storage chamber communicate with each other.

公开(公告)号：US20210285412A1

公开(公告)日：2021-09-16

申请号：US17331444

申请日：2021-05-26

Applicant: DENSO CORPORATION

Inventor： Yuki WATANABE ,  Kouichi MOCHIZUKI ,  Atsuya OKAMOTO

IPC: F02M61/18

Abstract: A valve body has a seat surface swollen toward a seating surface of an injection hole body having an injection hole. A fuel passage is between the injection hole body and the valve body and is opened and closed due to separation and seating of the seat surface. In a seat portion throttle state, a flow rate of injected fuel is throttled by a gap between the seat surface and the seating surface. In an injection hole throttle state, the flow rate of fuel is throttled by the injection hole. When the valve body is operated from a valve closing position to a full lift position, the seat portion throttle state is brought from the valve closing position to a predetermined intermediate position, and the injection hole throttle state is brought from the intermediate position to the full lift position.

公开(公告)号：US20200224621A1

公开(公告)日：2020-07-16

申请号：US16830812

申请日：2020-03-26

Applicant: DENSO CORPORATION

Inventor： Shinsuke YAMAMOTO ,  Kouichi MOCHIZUKI ,  Atsuya OKAMOTO

IPC: F02M51/06

Abstract: A fuel injection valve includes a valve body, a fixed core, a movable core, a spring, a cup, and a guide. The cup contacts the spring and the valve body to transmit a valve closing elastic force to the valve body, and includes a cylindrical portion having a cylindrical shape. The guide has a sliding surface on which an outer peripheral surface of the cylindrical portion slides so as to guide the movement of the cylindrical portion in an axial direction while restricting the movement of the cylindrical portion in a radial direction. The guide has a recessed surface connected to the sliding surface and recessed to increase a gap between the recessed surface and the cup in the radial direction.

公开(公告)号：US20210332780A1

公开(公告)日：2021-10-28

申请号：US17367766

申请日：2021-07-06

Applicant: DENSO CORPORATION

Inventor： Shinsuke YAMAMOTO ,  Yuki WATANABE ,  Atsuya OKAMOTO

IPC: F02M51/06

Abstract: A fixed core generates a magnetic attraction force with energization of a coil. A movable core has an attracted surface facing an attracting surface of the fixed core is attracted to the fixed core to cause the valve body to open a nozzle hole. A stopper member abuts against the movable core to restrict movement of the movable core. The movable core has an abutment portion that abuts against the stopper member, and a core body portion in which the attracted surface is formed. The attracting surface and the attracted surface extend annularly around an axis line of the fixed core, are formed so as to be separated from each other in an axis line direction in a state where the abutment portion abuts against the stopper member, and a separation distance from each other increases toward a radially outer side.

公开(公告)号：US20140084087A1

公开(公告)日：2014-03-27

申请号：US14018871

申请日：2013-09-05

Applicant: Eiji MURASE ,  Akira KAMADA ,  Keisuke KOMORI ,  DENSO CORPORATION

Inventor： Kiyotaka YOSHIMARU ,  Eiji MIMURA ,  Atsuya OKAMOTO ,  Akira KAMADA ,  Eiji MURASE ,  Keisuke KOMORI

IPC: F02M51/06

CPC classification number: F02M51/0614 ,  F02M51/061 ,  F02M51/066

Abstract: A needle has a large-diameter portion, an outer diameter of which is larger than that of a shaft portion of the needle. A needle-side tapered surface is formed at the large-diameter portion on a valve closing side thereof, wherein the needle-side tapered surface is inclined by a needle angle with respect to a center axis of the needle. A core-side tapered surface is formed at a movable core, wherein the core-side tapered surface is inclined by a core angle with respect to the center axis of the needle. The needle and the movable core are brought into contact with each other via the needle-side and the core-side tapered surfaces. The needle angle and the core angle are made to be equal to each other.

Abstract translation: 针具有大直径部分，其外径大于针的轴部分的直径部分。 针侧锥形表面形成在其关闭侧的大直径部分处，其中针侧锥形表面相对于针的中心轴倾斜针角。 芯侧锥形表面形成在可动芯上，其中芯侧锥形表面相对于针的中心轴线倾斜一个芯角。 针和可动芯经由针侧和芯侧锥形表面彼此接触。 使针角和芯角相互相等。

公开(公告)号：US20210277861A1

公开(公告)日：2021-09-09

申请号：US17329864

申请日：2021-05-25

Applicant: DENSO CORPORATION

Inventor： Kouichi MOCHIZUKI ,  Koichi OHATA ,  Atsuya OKAMOTO ,  Noritsugu KATO ,  Yuki KATO

IPC: F02M61/18

Abstract: A fuel injection valve including: an injection hole body formed of metal and having an injection hole configured to inject fuel; and a metal holder that has a cylindrical shape having an insertion port in which the injection hole body is inserted, and is fusion welded to a portion of the injection hole body located inside the insertion port. The injection hole body includes a body-side fused portion formed by fusion welding, a heat-affected portion which is located on a side of the insertion port with respect to the body-side fused portion, and of which a tissue structure is changed due to heat of the fusion welding, and a seal portion located on an opposite side of the heat-affected portion from the body-side fused portion and extending in an annular shape around a cylinder center line of the holder to come into close contact with the holder.

公开(公告)号：US20200224622A1

公开(公告)日：2020-07-16

申请号：US16830826

申请日：2020-03-26

Applicant: DENSO CORPORATION

Inventor： Shinsuke YAMAMOTO ,  Kouichi MOCHIZUKI ,  Atsuya OKAMOTO ,  Yuki WATANABE ,  Tohru SEKIDO

IPC: F02M51/06

Abstract: A fuel injection valve includes a valve body, a fixed core, a movable core, a spring, and a cup. The spring is elastically deformed according to valve opening operation of the valve body, and exerts a valve closing elastic force for closing the valve body. The cup contacts a valve closing contact surface of the valve body, and transmits the valve closing elastic force to the valve body. At a start of predetermined-distance movement of the movable core together with the cup, the cup is in contact with the valve closing contact surface, and the valve body or the cup has a supply flow channel through which fuel is supplied to the valve body closing contact surface which is in a state contacting the cup.