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公开(公告)号：US20220356860A1
公开(公告)日：2022-11-10
申请号：US17870064
申请日：2022-07-21
Applicant: DENSO CORPORATION
Inventor： Keita IMAI , Atsushi HONDA
Abstract: A fuel injection valve includes a nozzle, a housing, a needle, and a throttle portion. The nozzle includes an injection hole through which fuel is injected and a valve seat formed around the injection hole. The nozzle includes an injection hole through which fuel is injected and a valve seat formed around the injection hole. The housing has a fuel flow path through which the fuel to the injection hole flows. One end of the needle is configured to open and close the injection hole by being separated from the valve seat or abutted on the valve seat. The throttle portion is provided upstream with respect to the valve seat in a fuel flow direction.
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公开(公告)号：US20190277236A1
公开(公告)日：2019-09-12
申请号：US16291249
申请日：2019-03-04
Applicant: DENSO CORPORATION
Inventor： Hiroyuki HARADA , Takanori KITO , Keita IMAI , Makoto SAIZEN
Abstract: An injection hole body has an injection hole to inject fuel for causing combustion in an internal combustion engine. A valve body is unseated from and seated on a seating surface of the injection hole body. The injection hole body and the valve body form a fuel passage therebetween to communicate with an inflow port of the injection hole. The fuel passage is opened and closed by unseating and seating of the valve body. A resilient member generates a resilient force to urge the valve body toward the seating surface. A seat angle is an angle between two straight lines appearing in a cross section of the seating surface, the cross section including a center axis of the valve body. The seat angle is 90 degrees or less.
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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
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.
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Patent Agency Ranking
公开(公告)号：US20180030943A1
公开(公告)日：2018-02-01
申请号：US15554095
申请日：2016-03-23
Applicant: DENSO CORPORATION
Inventor： Noritsugu KATO , Keita IMAI
CPC classification number: F02M61/1833 , F02M61/14 , F02M61/18
Abstract: In a fuel injection device including a body portion that forms an injection hole through which a fuel is injected, the body portion includes an inlet-channel-forming portion that is connected to an inflow port of the fuel in the injection hole and forms an inlet channel which is a fuel flow channel, and an outlet-channel-forming portion that is connected to the inlet channel and an outflow port of the fuel in the injection hole, and forms an outlet channel that is a fuel flow channel. A surface roughness of the outlet-channel-forming portion is larger than a surface roughness of the inlet-channel-forming portion.
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公开(公告)号：US20170009689A1
公开(公告)日：2017-01-12
申请号：US15270013
申请日：2016-09-20
Applicant: DENSO CORPORATION
Inventor： Keita IMAI
CPC classification number: F02D41/20 , F02D41/38 , F02D41/402 , F02D2041/2013 , F02D2041/2027 , F02D2041/2034 , F02D2041/2065 , F02D2041/389 , F02M51/005 , F02M51/0621
Abstract: A fuel injection controller includes an increase control portion applying the boost voltage to the coil to increase a coil current to a first target value, and a constant current control portion applying a voltage to the coil to hold the coil current to a second target value. A threshold is an energization time period that is necessary to reach a boundary point between a seat throttle area of a property line and an injection-port throttle area of the property line from an energization start time point. An initial-current applied time period is from the energization start time point that the boost voltage starts to be applied to the coil to a time point that the coil current is decreased to the second target value. The increase control portion controls the coil current such that the initial-current applied time period is less than the threshold.
Abstract translation: 燃料喷射控制器包括增加控制部分，将升压电压施加到线圈以将线圈电流增加到第一目标值，以及恒定电流控制部分向线圈施加电压以将线圈电流保持在第二目标值。 阈值是从通电开始时刻到达属性线的座椅节气门区域和属性线的喷射口节流区域之间的边界点所需的通电时间段。 初始电流施加时间段是从升压开始施加到线圈的通电开始时刻到线圈电流降低到第二目标值的时间点。 增加控制部分控制线圈电流，使得初始电流施加的时间段小于阈值。
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公开(公告)号：US20140238354A1
公开(公告)日：2014-08-28
申请号：US14189351
申请日：2014-02-25
Applicant: DENSO CORPORATION
Inventor： Keita IMAI
IPC: F02D41/30
CPC classification number: F02D41/20 , F02D41/38 , F02D41/402 , F02D2041/2013 , F02D2041/2027 , F02D2041/2034 , F02D2041/2065 , F02D2041/389 , F02M51/005 , F02M51/0621
Abstract: A fuel injection controller includes an increase control portion applying the boost voltage to the coil to increase a coil current to a first target value, and a constant current control portion applying a voltage to the coil to hold the coil current to a second target value. A threshold is an energization time period that is necessary to reach a boundary point between a seat throttle area of a property line and an injection-port throttle area of the property line from an energization start time point. An initial-current applied time period is from the energization start time point that the boost voltage starts to be applied to the coil to a time point that the coil current is decreased to the second target value. The increase control portion controls the coil current such that the initial-current applied time period is less than the threshold.
Abstract translation: 燃料喷射控制器包括增加控制部分，将升压电压施加到线圈以将线圈电流增加到第一目标值，以及恒定电流控制部分向线圈施加电压以将线圈电流保持在第二目标值。 阈值是从通电开始时刻到达属性线的座椅节气门区域和属性线的喷射口节流区域之间的边界点所需的通电时间段。 初始电流施加时间段是从升压开始施加到线圈的通电开始时刻到线圈电流降低到第二目标值的时间点。 增加控制部分控制线圈电流，使得初始电流施加的时间段小于阈值。
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公开(公告)号：US20140124602A1
公开(公告)日：2014-05-08
申请号：US14071228
申请日：2013-11-04
Applicant: DENSO CORPORATION
Inventor： Keita IMAI
IPC: F02M51/06
CPC classification number: F02M51/061 , F02D41/20 , F02D2041/2006 , F02D2041/2041 , F02D2041/2058 , F02D2200/0602 , F02M51/0671 , F02M2200/08
Abstract: A fuel injection device includes a fuel injector and a control portion. The fuel injector is inserted into an attachment hole which is placed at a predetermined position of a cylinder head. The fuel injector has a housing in which a coil is provided. At least a part of the housing which accumulates the coil is surrounded over the whole circumference by an inner circumference surface of the attachment hole. The control portion has an increasing control portion and a holding control portion. The increasing control portion increases a current flowing through the coil to a first target value. The holding control portion holds the current to the first target value.
Abstract translation: 燃料喷射装置包括燃料喷射器和控制部分。 燃料喷射器插入到安装在气缸盖的预定位置的安装孔中。 燃料喷射器具有其中设置有线圈的壳体。 蓄积线圈的壳体的至少一部分通过安装孔的内周面在整个圆周上被包围。 控制部分具有增加的控制部分和保持控制部分。 增加的控制部分将流过线圈的电流增加到第一目标值。 保持控制部将电流保持为第一目标值。
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公开(公告)号：US20140124601A1
公开(公告)日：2014-05-08
申请号：US14070670
申请日：2013-11-04
Applicant: DENSO CORPORATION
Inventor： Keita IMAI
IPC: F02M51/06
CPC classification number: F02D41/20 , F02D2041/2017 , F02D2041/2041 , F02D2041/2044 , F02D2041/2058 , F02D2041/2065
Abstract: A fuel injection controller includes a current-increase control portion applying a voltage to the coil so that the coil current is increased to a first target value, and a current-hold control portion applying the voltage to the coil so that the increased coil current is held at the first target value. A maximum electromagnetic attracting force to start a valve opening is referred to as a required valve-opening force. A saturated electromagnetic attracting force by the coil current of the first target value is referred to as a static attracting force. The first target value is established in such a manner that the static attracting force is greater than the required valve opening force.
Abstract translation: 燃料喷射控制器包括电流增加控制部分，向线圈施加电压，使得线圈电流增加到第一目标值;以及电流保持控制部分，向线圈施加电压，使得增加的线圈电流为 持有第一个目标值。 将阀开启的最大电磁吸引力称为所需的开阀力。 通过第一目标值的线圈电流的饱和电磁吸引力被称为静态吸引力。 第一目标值以静电吸引力大于所需阀开启力的方式建立。
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