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    • 5. 发明专利
    • Fuel injection system
    • 燃油喷射系统
    • JP2009281276A
    • 2009-12-03
    • JP2008133973
    • 2008-05-22
    • Denso CorpNippon Soken Inc株式会社デンソー株式会社日本自動車部品総合研究所
    • TODA NAOKIHISHINUMA OSAMUNAKADA KENICHIRO
    • F02M47/00F02D41/40F02D45/00F02M47/02
    • F02D41/3872F02D2041/225F02D2200/0604F02M47/027F02M57/00F02M2200/24
    • PROBLEM TO BE SOLVED: To provide a fuel injection system dispensing with high pressure resistant sealing performance while allowing detection of an actual injection state.
      SOLUTION: The fuel injection system is provided with: an injector 20 having a high pressure passage 21b formed in an inside of a body 21 and making high pressure fuel flow into an injection hole 21c, a low pressure passage 21g formed in the inside of the body 21 and returning the excess fuel supplied to the high pressure passage 21b to a fuel tank 10, and a nozzle needle 24 for opening and closing the high pressure passage 21b; and low pressure piping 15 connected to the injector 20 and returning low pressure fuel in the low pressure passage 21g to the fuel tank 10. A return pressure sensor 28 for detecting a pressure of the low pressure fuel is disposed in a return passage 21e extended to the fuel tank 10 through the low pressure passage 21g and the low pressure piping 15. The injection state of the fuel injected from the injection hole 21c is detected based on the behavior of a detection value of the return pressure sensor 28.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种在允许检测实际注射状态的同时分配高耐压密封性能的燃料喷射系统。 解决方案:燃料喷射系统设置有:喷射器20,其具有形成在主体21的内部的高压通道21b,并使高压燃料流入喷射孔21c;低压通道21g形成在喷射孔 并且将供给高压通道21b的多余的燃料返回到燃料箱10,以及用于打开和关闭高压通道21b的喷嘴针24; 连接到喷射器20的低压管道15,并将低压通道21g中的低压燃料返回到燃料箱10.用于检测低压燃料的压力的返回压力传感器28设置在延伸到 燃料箱10通过低压通道21g和低压管道15.从喷射孔21c喷射的燃料的喷射状态基于返回压力传感器28的检测值的行为来检测。COPYRIGHT (C)2010,JPO&INPIT
    • 6. 发明专利
    • Fuel injection valve
    • 燃油喷射阀
    • JP2014095343A
    • 2014-05-22
    • JP2012247658
    • 2012-11-09
    • Nippon Soken Inc株式会社日本自動車部品総合研究所Denso Corp株式会社デンソー
    • TODA NAOKIARIKAWA FUMIAKIADACHI HISAFUMI
    • F02M47/00
    • PROBLEM TO BE SOLVED: To improve linearity in "actual injection amount versus injection command time period".SOLUTION: When a nozzle needle 43 exists at a full lift position, a nozzle high-pressure communication passage 433 and a cylinder high-pressure communication passage 441 are communicated, a fuel reserving chamber 413 and a needle control chamber 46 are kept in a communicated state through the nozzle high-pressure communication passage 433 and the cylinder high-pressure communication passage 441, and lowering of a pressure of the needle control chamber 46 is prevented. By keeping the pressure of the needle control chamber 46 to be a prescribed pressure or more, a valve closing state of a high-pressure control valve 48 is kept, and hunching of the high-pressure control valve 48 is prevented. Accordingly, dispersion in the position of the high-pressure control valve 48 in closing a discharge control valve 47, is eliminated, and further dispersion in a time period from the closing of the discharge control valve 47 to start of movement in the valve closing direction, of the nozzle needle 43 is eliminated, thus the linearity in "actual injection amount versus injection command time period" can be improved.
    • 要解决的问题:提高“实际喷射量与喷射指令时间段”的线性度。解决方案:当喷嘴针43存在于全升程位置时,喷嘴高压连通通道433和气缸高压连通通道 441连通,燃料储存室413和针控制室46通过喷嘴高压连通路433和气缸高压连通路441保持连通状态,并且降低针控制室的压力 46被阻止。 通过将针控制室46的压力保持在规定的压力以上,能够保持高压控制阀48的关闭状态,并且能够防止高压控制阀48的冲击。 因此,消除了在关闭排气控制阀47时在高压控制阀48的位置处的分散,并且在从排出控制阀47的关闭到关闭方向的开始运动的时间段内进一步分散 ,因此可以提高“实际喷射量与喷射指令时间段”之间的线性。
    • 7. 发明专利
    • Three-way selector valve and fuel injection device using the same
    • 三路选择阀和燃油喷射装置
    • JP2008304017A
    • 2008-12-18
    • JP2007153283
    • 2007-06-08
    • Denso CorpNippon Soken Inc株式会社デンソー株式会社日本自動車部品総合研究所
    • TODA NAOKITOMITA HIROKUNIARIKAWA FUMIAKIHORIUCHI YASUHIRO
    • F16K11/20F02M47/00F02M47/02F16K1/44F16K31/12
    • PROBLEM TO BE SOLVED: To provide a three-way selector valve for suppressing energy loss due to the flow of fluid out of a back pressure chamber in which the fluid flows to energize a valve element, into a low pressure passage; and to provide a fuel injection device using the selector valve.
      SOLUTION: The three-way selector valve 51 comprises a valve chest 61 storing the first and second valve elements 7, 8. The first and second valve elements 7, 8 are slidably supported, and first and second back pressure chambers 62, 63 are formed on the other end sides of the valve elements. The first valve element 7 is operated with a pressure difference between the first back pressure chamber 62 and the valve chest 61 to open/close a control fuel supply passage 96. The second valve element 8 is operated with a pressure difference between the valve chest 61 and the second back pressure chamber 63 to open/close a second return passage 99. The second valve element 8 has an inner periphery side abutting portion 821 between a second sliding portion 83 of the second valve element 8 and the second return passage 99 for abutting on a lower end face 617 of the valve chest 61 when the second valve element 8 closes the second return passage 99. Thus, high pressure fuel is prevented from flowing out of the second back pressure chamber 63 via the second sliding portion 83 into the second return passage 99.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种三通换向阀,用于抑制流体从流体流动的背压室流动以使阀元件激励的流体流入低压通道中的能量损失; 并提供使用该选择阀的燃料喷射装置。 解决方案:三通切换阀51包括储存第一和第二阀元件7,8的阀座61.第一和第二阀元件7,8可滑动地支撑,第一和第二后压力室62, 63形成在阀元件的另一端侧。 第一阀元件7以第一背压室62与阀室61之间的压差进行操作,以打开/关闭控制燃料供给通道96.第二阀元件8在阀室61之间的压力差 和第二背压室63,以打开/关闭第二返回通道99.第二阀元件8在第二阀元件8的第二滑动部分83和第二返回通道99之间具有内周侧抵接部分821,用于邻接 当第二阀元件8关闭第二返回通道99时,在阀室61的下端面617上。因此,防止高压燃料经由第二滑动部分83流出第二后压力室63进入第二回流通道 返回通道99.版权所有(C)2009,JPO&INPIT
    • 9. 发明专利
    • 燃料噴射ノズル
    • 燃油喷射喷嘴
    • JP2014196702A
    • 2014-10-16
    • JP2013072604
    • 2013-03-29
    • 株式会社日本自動車部品総合研究所Nippon Soken Inc株式会社デンソーDenso Corp
    • KAMAHARA MOTOYAARIKAWA FUMIAKIHIJIMA TOSHIAKITODA NAOKIKAKEHASHI NOBUHISAKONDO ATSUSHISERIZAWA KAZUFUMISAITO MASAMITSUTANADA YUKI
    • F02M61/18F02M51/06
    • F02M61/1846
    • 【課題】内燃機関に燃料を噴射する燃料噴射ノズルにおいて、所望の噴射角を維持しつつ、噴霧貫徹力を向上させる。【解決手段】噴孔11は、サック壁面20に開口する入口11aを有する内側部11cと、出口11bを有する外側部11dを有する。また、内側部11cの流路軸xと外側部11dの流路軸yとは交差し、内側部11cの流路軸とサック壁面20とのなす角度&thetas;inが、外側部11dの流路軸とサック壁面20とのなす角度&thetas;outよりも大きい。これによれば、噴孔11の外側部11dによって所望の噴射角を維持しつつも、噴孔11の内側部11cによって燃料流入角を緩やかにすることができるため、噴孔入口近傍での燃料流れの剥離を抑制することができる。この結果、圧力損失を低減できるので、噴霧貫徹力を向上させることができる。【選択図】図2
    • 要解决的问题:提供一种燃料喷射喷嘴,其将燃料喷射到内燃机中,并且在保持期望的喷射角度的同时提高喷射力。解决方案:喷射孔11具有内部部分11c,其具有入口 11a在袋壁表面20上打开,外部部分11d具有出口11b。 内侧部分11c的流路轴线“x”和外侧部分11d的流路轴线“y”彼此交叉,角度和角度在内侧部分11c的流路轴线与袋壁表面之间 20大于角度和外面部分11d的流动通道轴线与袋壁表面20之间。因此,当通过喷射孔11的外部部分11d保持期望的喷射角度时,燃料流入角 可以通过喷射孔11的内部部分11c变得柔和,因此可以抑制燃料流动,以防止喷射孔入口周围的分离。 因此,可以降低压力损失,从而可以提高喷射贯穿力。
    • 10. 发明专利
    • Fuel injection valve
    • 燃油喷射阀
    • JP2013234586A
    • 2013-11-21
    • JP2012106677
    • 2012-05-08
    • Nippon Soken Inc株式会社日本自動車部品総合研究所Denso Corp株式会社デンソー
    • TODA NAOKIMASUDA MAKOTO
    • F02M61/18F02M61/10
    • PROBLEM TO BE SOLVED: To provide a fuel injection valve which reduces smoke and unburned HC by achieving both improving the injection pressure of fuel at the beginning of the valve opening of a needle and reducing the volume of a sack section.SOLUTION: Ami(L)≥0.8×As(L) and Aave≤0.12×Dsare satisfied when a lifting amount L of a needle 11 is within a range of As(L)≤3×Ah where Ah is the total flow path section area of an injection hole 25, As(L) is the flow path section area formed between a seal section 18 and a nozzle body 12 when the lifting amount of the needle 11 is L, Ami(L) is the minimum flow path section area between the seal section 18 and the injection hole 25 when the lifting amount of the needle 11 is L, Aave is the average flow path section area between the seal section 18 and the injection hole 25 when the valve of the needle 11 is closed, and Ds is the seal diameter of the seal section 18. By these conditions being satisfied, both improvement of the injection pressure of fuel at the beginning of valve opening of the needle 11 and reduction of the volume of the sack section 23 are achieved.
    • 要解决的问题:提供一种燃料喷射阀,其通过在针阀开启时提高燃料的喷射压力并减小袋部的体积来减少烟雾和未燃烧HC。解决方案:Ami(L )≥0.8×As(L)和Aave≤0.12×当针11的提升量L在As(L)≤3×Ah的范围内时,Dsare满足,其中Ah是喷射孔的总流路截面面积 如图25所示,当针11的提升量为L时,As(L)是在密封部18与喷嘴体12之间形成的流路截面积,Ami(L)是密封部18之间的最小流路截面积 以及当针11的提升量为L时的注入孔25,当针11的阀关闭时,Aave为密封部18与喷射孔25之间的平均流路截面积,Ds为密封直径 在满足这些条件的情况下,注射压力的改善均可 在针11的开阀开始时确保燃料,并且实现了袋部23的体积的减小。