公开(公告)号：US20140217317A1

公开(公告)日：2014-08-07

申请号：US14169265

申请日：2014-01-31

Applicant: DENSO CORPORATION

Inventor： Katsuhiro ICHIHASHI ,  Fumiaki ARIKAWA ,  Naoki MITSUMATA ,  Masahiro WATANABE

IPC: F16K31/06

CPC classification number: F16K31/06 ,  F02M63/0012 ,  F16K1/34 ,  F16K31/0665 ,  F16K31/0696

Abstract: An electromagnetic valve includes a driving portion, a valve body, and a valve element. The driving portion generates a magnetic attractive force according to an energization. The valve body has an orifice through which a fluid flows, and a valve seat around an opening portion of the orifice. The valve element displaces according to the magnetic attractive force and a fluid force that is applied from the fluid, to vary a passage area between the valve element and the valve seat. When the valve element is placed at a position separated farthest from the valve seat, the passage area between the valve element and the valve seat is less than or equal to a passage area of the orifice.

Abstract translation: 电磁阀包括驱动部分，阀体和阀元件。 驱动部根据通电产生磁吸引力。 阀体具有流体流过的孔口和围绕孔口的开口部分的阀座。 阀元件根据磁吸引力和从流体施加的流体力而移位，以改变阀元件和阀座之间的通道面积。 当阀元件位于离阀座最远的位置时，阀元件和阀座之间的通道面积小于或等于孔口通道面积。

公开(公告)号：US20190063358A1

公开(公告)日：2019-02-28

申请号：US16101688

申请日：2018-08-13

Applicant: DENSO CORPORATION

Inventor： Masahiro WATANABE ,  Daiji UEDA ,  Hiroki TANADA

IPC: F02D41/20

Abstract: A fuel injection control device has a valve opening control portion which opens a control valve by electrically charging a piezoelectric element, and a valve closing portion which closes the control valve. The valve opening control portion includes a first rising control portion, a pause control portion and a second control portion. The first rising control portion increases a charge amount of the piezoelectric element during a first rising period. The pause control portion pauses an increase in the charge amount of the piezoelectric element during a pause period after the first rising period. The second rising control portion increases the charging amount of the piezoelectric elements again during a second rising period after the pause period. The pause period includes a period of immediately before the control valve is opened.