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    FUEL INJECTION VALVE
    1.
    发明公开
    FUEL INJECTION VALVE 审中-公开
    燃油喷射阀

    公开(公告)号：EP3263885A1

    公开(公告)日：2018-01-03

    申请号：EP16743048.7

    申请日：2016-01-08

    申请人： Hitachi Automotive Systems, Ltd.

    发明人： MIYAMOTO Akiyasu ,  ABE Motoyuki ,  YASUKAWA Yoshihito ,  MIYAKE Takao ,  IIZUKA Akira ,  OGURA Kiyotaka

    IPC分类号： F02M61/10 ,  F02M51/06 ,  F02M61/16

    CPC分类号： F02M51/0625 ,  F02M51/06 ,  F02M51/066 ,  F02M51/0685 ,  F02M61/10 ,  F02M61/16 ,  F02M61/166 ,  F02M61/18 ,  F02M61/205 ,  F02M2200/00 ,  F02M2200/26 ,  F02M2200/306 ,  F02M2200/9015

    摘要： An object of the present invention is to provide a fuel injection valve configured to suppress bouncing of a valve element that is caused as a result of the valve element being rendered elastic when the valve element collides with a valve seat.
    The fuel injection valve of the present invention includes the valve element configured to come into contact with the valve seat for closing an injection hole and to separate from the valve seat for unclosing the injection hole, an elastic member urging the valve element toward the valve seat, a movable iron core disposed to be in and out of contact with the valve element, a fixed iron core disposed to be opposed to the movable iron core, and a coil configured to generate electromagnetic force for moving the movable iron core. At least one lower rigidity part having reduced rigidity per axial unit length is provided between a surface where urging force of the elastic member is transmitted to the valve element and a seat part whereat the valve element comes into contact with and separates from the valve seat.

    摘要翻译： 本发明的目的在于提供一种燃料喷射阀，其构造成抑制当阀元件与阀座碰撞时由于阀元件弹性而引起的阀元件的弹跳。 本发明的燃料喷射阀包括：阀元件，该阀元件被构造成与用于关闭喷射孔的阀座接触并且与用于打开喷射孔的阀座分离;弹性构件，其将阀元件朝向阀座 可移动铁芯，其设置成与阀元件接触和不接触;固定铁芯，其设置为与可移动铁芯相对;以及线圈，其被配置为产生用于移动可移动铁芯的电磁力。 在弹性部件的作用力传递至阀体的面与阀体与阀座接触分离的座部之间，设置至少一个每轴单位长度的刚性降低的下部刚性部。

    FUEL INJECTION VALVE
    3.
    发明公开
    FUEL INJECTION VALVE 审中-公开
    燃油喷射阀

    公开(公告)号：EP3252302A1

    公开(公告)日：2017-12-06

    申请号：EP16743079.2

    申请日：2016-01-12

    申请人： Hitachi Automotive Systems, Ltd.

    发明人： MIYAKE Takao ,  NAKAI Atsushi ,  OGURA Kiyotaka ,  IIZUKA Akira

    IPC分类号： F02M61/18

    摘要： Recent exhaust gas regulation requires reduction of an amount and quantity of particulate matter included in an exhaust gas, and a normal maximum fuel pressure may be increased to approximately 35MP. When the normal maximum fuel pressure is 35 MPa, a fuel injection valve is required to work for example at a pressure up to 45 MPa. In such a condition, a fluid force may exceed a valve opening force depending on a seat diameter, and a needle valve cannot be kept open and closed, when opening thereof is required.
    In order to solve the above problems, a fuel injection valve according to the present invention includes a valve seat portion, a valve body which is seated on or separated from the valve seat portion, an injection hole which is formed on a downstream side from the valve seat portion, and a guide portion which is formed on an upstream side from the valve seat portion seating a valve body seat portion of the valve body to guide a guided portion on a downstream side of the valve body, in which the valve seat portion is formed to have a dimension in a crossing direction crossing an axial direction of 0.4 to 0.8 times a dimension of the guide portion in the crossing direction.

    摘要翻译： 最近的废气调节要求减少排气中包含的颗粒物质的量和数量，并且正常的最大燃料压力可以增加到约35MP。 当正常最大燃料压力为35MPa时，燃料喷射阀需要例如在高达45MPa的压力下工作。 在这种状态下，流体力可能会超过阀座的开启力，并且当需要打开时，针阀不能保持打开和关闭。 为了解决上述问题，根据本发明的燃料喷射阀包括：阀座部分;阀座，该阀座位于阀座部分上或与阀座部分分离;喷射孔，形成在阀座部分的下游侧 阀座部以及引导部，所述引导部形成在所述阀座部的上游侧，所述引导部就座于所述阀体的阀体座部，以在所述阀体的下游侧引导被引导部，其中，所述阀座部 形成为具有在与交叉方向上的引导部分的尺寸的0.4至0.8倍相交的与轴向方向交叉的交叉方向上的尺寸。