公开(公告)号：US20150260182A1

公开(公告)日：2015-09-17

申请号：US14729082

申请日：2015-06-03

Applicant: DENSO CORPORATION

Inventor： Masayuki KOBAYASHI ,  Eiji ITO ,  Yoshitomo OGUMA ,  Yuusuke ANDOU

IPC: F04B53/00 ,  F04B7/00 ,  F02M59/02 ,  F04B53/10 ,  F04B53/16 ,  F04B43/02 ,  F04B53/14

CPC classification number: F04B53/001 ,  F02M59/02 ,  F04B7/0015 ,  F04B11/0008 ,  F04B43/02 ,  F16L55/0338 ,  F16L55/04

Abstract: A high-pressure pump has an elastic member arranged in a damper chamber between a first diaphragm and a second diaphragm. The elastic member is always in contact with both diaphragms while the high-pressure pump is operated. When the diaphragms are further vibrated due to a resonance under a situation where a frequency of the pressure pulsation of low-pressure fuel is in agreement with the characteristic frequency of the diaphragms, the elastic member restricts the deformation of the diaphragms. Therefore, the resonance of the first diaphragm and the second diaphragm can be restricted.

Abstract translation: 高压泵具有在第一隔膜和第二隔膜之间的阻尼室中布置的弹性构件。 当高压泵运转时，弹性部件总是与两个膜片接触。 当在低压燃料的压力脉动的频率与隔膜的特征频率一致的情况下由于共振而使隔膜进一步振动时，弹性构件限制隔膜的变形。 因此，可以限制第一膜片和第二膜片的共振。

公开(公告)号：US20140137841A1

公开(公告)日：2014-05-22

申请号：US14082794

申请日：2013-11-18

Applicant: DENSO CORPORATION

Inventor： Keigo OOHATA ,  Eiji ITO

IPC: F02M61/14

CPC classification number: F02M61/14 ,  F02M55/004 ,  F02M2200/02 ,  F02M2200/16

Abstract: A fuel injector includes a body having a fuel injection port, and a seal ring on the body. The body has a diameter-shrink portion of which an outer diameter is shrunk. The seal ring is engaged with the diameter-shrink portion. The diameter-shrink portion has a radially concaved annular groove with which a tip end portion of the seal ring is engaged. It is restricted that the seal ring is rubbed against an inner surface of the assembling hole and the seal ring is damaged.

Abstract translation: 燃料喷射器包括具有燃料喷射口的主体和主体上的密封环。 主体具有外径缩小的直径缩小部分。 密封环与直径缩小部分接合。 直径缩小部分具有径向凹陷的环形槽，密封环的末端部分与之接合。 限制密封环与组装孔的内表面摩擦，并且密封环损坏。

公开(公告)号：US20140123960A1

公开(公告)日：2014-05-08

申请号：US14071200

申请日：2013-11-04

Applicant: DENSO CORPORATION

Inventor： Keita IMAI ,  Eiji ITO

IPC: F02D41/30

CPC classification number: F02D41/30 ,  F02D41/08 ,  F02D41/20 ,  F02D2041/2006 ,  F02D2041/2058

Abstract: A fuel injection controller is applied to a fuel injector injecting fuel to be combusted in an internal combustion engine by an open-valve operation of the valve body according to an electromagnetic suction force generated by an energization of a coil. The fuel injection controller controls an injection state of the fuel injector by controlling a coil current flowing through the coil. The fuel injection controller includes an increasing control portion which increases the coil current to a first target value, a holding control portion which holds the coil current increased by the increasing control portion to the first target value, and a changing portion which changes the first target value according to the operation state of the internal combustion engine.

Abstract translation: 燃料喷射控制器被施加到燃料喷射器，该燃料喷射器根据由线圈的通电产生的电磁吸力，通过阀体的开阀操作喷射燃烧在内燃机中的燃料。 燃料喷射控制器通过控制流过线圈的线圈电流来控制燃料喷射器的喷射状态。 燃料喷射控制器包括将线圈电流增加到第一目标值的增加控制部分，将由增加的控制部分增加的线圈电流保持为第一目标值的保持控制部分，以及改变部分，其改变第一目标 值根据内燃机的运转状态而变化。

公开(公告)号：US20180363584A1

公开(公告)日：2018-12-20

申请号：US16109795

申请日：2018-08-23

Applicant: DENSO CORPORATION

Inventor： Keita IMAI ,  Eiji ITO

IPC: F02D41/30 ,  F02D41/20 ,  F02D41/08

Abstract: A fuel injection controller is applied to a fuel injector injecting fuel to be combusted in an internal combustion engine by an open-valve operation of the valve body according to an electromagnetic suction force generated by an energization of a coil. The fuel injection controller controls an injection state of the fuel injector by controlling a coil current flowing through the coil. The fuel injection controller includes an increasing control portion which increases the coil current to a first target value, a holding control portion which holds the coil current increased by the increasing control portion to the first target value, and a changing portion which changes the first target value according to the operation state of the internal combustion engine.