公开(公告)号：US20160258404A1

公开(公告)日：2016-09-08

申请号：US14953658

申请日：2015-11-30

Applicant: DENSO CORPORATION

Inventor： Hiroki TANADA ,  Daiji UEDA ,  Motoya KANBARA

IPC: F02M61/04 ,  F02M61/14 ,  F02M61/10

CPC classification number: F02M61/045 ,  F02M47/027 ,  F02M61/10 ,  F02M61/14 ,  F02M63/0026 ,  F02M63/0036 ,  F02M2200/28 ,  F02M2547/001

Abstract: A valve cylinder partitions a first intermediate chamber from a second intermediate chamber. A first valve element in the first intermediate chamber includes a tubular high-pressure-side valve portion to control communication between a control chamber communication passage and the first intermediate chamber. A second valve element in the second intermediate chamber includes a low-pressure-side valve portion to control communication between an exhaust passage and the second intermediate chamber. A columnar rod portion located between the first valve element and the second valve element is slidably held at a cylinder hole of the valve cylinder. An internal passage communicates the control chamber communication passage with the second intermediate chamber. The high-pressure-side valve portion has an outer diameter greater than an outer diameter of the rod portion.

Abstract translation: 阀芯从第二中间室分隔第一中间室。 第一中间室中的第一阀元件包括用于控制控制室连通通道和第一中间室之间的连通的管状高压侧阀部分。 第二中间室中的第二阀元件包括用于控制排气通道和第二中间室之间的连通的低压侧阀部分。 位于第一阀元件和第二阀元件之间的柱状杆部分可滑动地保持在阀筒的气缸孔处。 内部通道将控制室连通通道与第二中间室连通。 高压侧阀部的外径大于杆部的外径。

公开(公告)号：US20190063384A1

公开(公告)日：2019-02-28

申请号：US16106091

申请日：2018-08-21

Applicant: DENSO CORPORATION

Inventor： Yuya KITAGAWA ,  Daiji UEDA

IPC: F02M47/02 ,  F02M63/00

Abstract: The pressing part includes an abutment part capable of being in contact with the inner peripheral surface of the pressing passage, and a depressed opposite part that is opposed to the exhaust port at a position away from the exhaust port in a perpendicular direction perpendicular to the displacement direction due to an outer peripheral surface of the pressing part recessed from the abutment part even when the abutment part is in contact with the inner peripheral surface of the pressing passage. When the abutment part is in contact with the inner peripheral surface of the pressing passage, a depression dimension of the depressed opposite part relative to the abutment part is set, such that an amount of fuel discharged from the valve chest is defined by the exhaust throttle part instead of a gap between the depressed opposite part and the inner peripheral surface of the pressing passage.

公开(公告)号：US20180195476A1

公开(公告)日：2018-07-12

申请号：US15738692

申请日：2016-06-02

Applicant: DENSO CORPORATION

Inventor： Hiroki TANADA ,  Daiji UEDA

IPC: F02M47/02

CPC classification number: F02M47/02 ,  F02M47/00 ,  F02M47/027 ,  F02M55/008 ,  F02M2547/008

Abstract: An enclosure member includes a throughhole that penetrates a cover portion. The cover portion includes a blocking portion that receives an abutment by a wall portion to close an opening of an outflow passage with respect to spaces outside of the enclosure member. The blocking portion is provided so as to surround an opening of the throughhole, and the throughhole is in communication with the outflow passage even when the blocking portion is abutting the wall portion. Further, a spring is outside of a back pressure chamber to bias the enclosure member. The enclosure member itself blocks outside spaces from the back pressure chamber, so the expenditure of high pressure fuel may be controlled, and an injection hole may be opened and closed by a needle.

公开(公告)号：US20190063385A1

公开(公告)日：2019-02-28

申请号：US16115854

申请日：2018-08-29

Applicant: DENSO CORPORATION

Inventor： Nao OGASAWARA ,  Daiji UEDA

IPC: F02M47/02 ,  F16K31/00

Abstract: A fuel injection device has a valve body, a drive portion, a nozzle needle, and a control valve body. The valve body defines a control chamber, a valve chamber and a low pressure communication passage. The nozzle needle is displaced due to a fuel pressure variation in the control chamber to open/close an injection port. When the control valve body sits on an upper seat surface, a low pressure communication passage is closed so that the valve chamber is fluidly disconnected from the low pressure chamber. The control valve body defines a gap restriction on the upper seat surface. A flow passage area of a sub orifice provided to the low pressure communication passage is smaller than a flow passage area of the gap restriction.

公开(公告)号：US20160115927A1

公开(公告)日：2016-04-28

申请号：US14859399

申请日：2015-09-21

Applicant: DENSO CORPORATION

Inventor： Hiroki TANADA ,  Daiji UEDA ,  Motoya KANBARA

IPC: F02M63/00

CPC classification number: F02M63/0026 ,  F02M47/027 ,  F02M63/0028

Abstract: A high-pressure-side valve portion makes contact with and moves from a high-pressure seat surface formed in a body to control communication between a control chamber communication passage and a high-pressure passage. A low-pressure-side valve portion makes contact with and moves from a low-pressure seat surface formed in the body to control communication between an exhaust passage and a second intermediate chamber. A releasing portion in the high-pressure-side valve portion communicates with the control chamber communication passage when the high-pressure seat surface is in contact with the high-pressure-side valve portion to block the control chamber communication passage from the high-pressure passage. A valve element internal passage is formed in the valve element to communicate the releasing portion with the second intermediate chamber.

Abstract translation: 高压侧阀部与形成在车体上的高压座面接触并移动，以控制控制室连通路和高压路之间的连通。 低压侧阀部与形成在本体中的低压座表面接触并移动，以控制排气通道和第二中间室之间的连通。 当高压座表面与高压侧阀部分接触时，高压侧阀部分中的释放部分与控制室连通通道连通，以将控制室连通通道从高压 通道。 阀元件内部通道形成在阀元件中以将释放部分与第二中间室连通。

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.

公开(公告)号：US20160356251A1

公开(公告)日：2016-12-08

申请号：US15170023

申请日：2016-06-01

Applicant: DENSO CORPORATION

Inventor： Motoya KANBARA ,  Fumiaki ARIKAWA ,  Satoshi SUGAWARA ,  Daiji UEDA ,  Hiroki TANADA ,  Toshiaki HIJIMA ,  Hitoshi MAEGAWA ,  Naoki TODA

IPC: F02M45/10 ,  F02M47/02 ,  F02M61/10 ,  F02M51/06

CPC classification number: F02M45/10 ,  F02M47/027 ,  F02M51/0603 ,  F02M51/0607 ,  F02M63/0026 ,  F02M2200/21 ,  F02M2200/704

Abstract: A fuel injection valve includes a body including a first chamber that supplies fuel of a first pressure, a second chamber that supplies fuel of a second pressure, and an injection hole, a valve chamber member including a valve chamber connectable to the first chamber and the second chamber, a control chamber member including a control chamber connectable to the first chamber, a needle pressed by pressure of fuel in the control chamber in a direction that causes fuel injection from the injection hole to stop, an actuator, a valve element that selectively connects the first chamber, second chamber, and the valve chamber according to the actuator extending and contracting, and a transmission mechanism that when the actuator extends, transmits the force to the needle as a force in a direction that causes fuel to be injected from the injection hole.

Abstract translation: 燃料喷射阀包括主体，该主体包括供给第一压力的燃料的第一室，提供第二压力的燃料的第二室和喷射孔;阀室构件，其包括可连接到第一室的阀室和 第二室，控制室构件，其包括可连接到第一室的控制室，通过控制室中的燃料压力沿着使得从喷射孔喷射的燃料停止的方向被按压的针，致动器，选择性地 根据致动器延伸和收缩连接第一腔室，第二腔室和阀腔室;以及传动机构，当致动器延伸时，传递机构将力作为力沿着从燃料喷射的方向喷射 注入孔。

公开(公告)号：US20160115896A1

公开(公告)日：2016-04-28

申请号：US14885175

申请日：2015-10-16

Applicant: DENSO CORPORATION

Inventor： Motoya KANBARA ,  Daiji UEDA

IPC: F02D41/40 ,  F02M45/10 ,  F02D41/20

CPC classification number: F02D41/403 ,  F02D41/2096 ,  F02D41/247 ,  F02D2041/2024 ,  F02D2041/2055 ,  F02D2041/2058 ,  F02M47/027 ,  F02M51/0603 ,  Y02T10/44

Abstract: When a main injection is performed, a first timing that is a time earlier than a second timing is selected as the valve opening starting timing, and a first period that is the period of time shorter than a second period is selected as the control period. Also, when a pilot injection is performed, the second timing that is the time later than the first timing is selected as the valve opening starting timing, and the second period that is the time longer than the first period is selected as the control period. Thus, in an injector with increased valve opening responsiveness, the valve opening behavior of a control valve of the injector in fuel injection with a minute injection quantity can be stabilized without replacing a control device, particularly an EDU with that of a large current specification.

Abstract translation: 当执行主喷射时，选择比第二定时早的时间的第一定时作为开阀开始定时，并且选择比第二时间段短的时间段的第一周期作为控制周期。 此外，当执行先导喷射时，选择比第一定时晚的时间的第二定时作为开阀开始定时，并且选择比第一时段长的时间段的第二时段作为控制周期。 因此，在具有增加的开阀响应性的喷射器中，可以稳定喷射器中喷射器的喷射器的控制阀的开阀性能，而不需要更换具有大电流规格的控制装置，特别是EDU。