公开(公告)号：US06990950B2

公开(公告)日：2006-01-31

申请号：US10873144

申请日：2004-06-23

申请人： Masahiro Asano ,  Yoshihiro Narahara ,  Eiji Takemoto ,  Akira Umehara

发明人： Masahiro Asano ,  Yoshihiro Narahara ,  Eiji Takemoto ,  Akira Umehara

IPC分类号： F02B3/00

CPC分类号： F02D41/2483 ,  F02D41/2438 ,  F02D41/2467

摘要： An electronic control unit (an ECU) of a fuel injection system performs a learning injection based on a learning injection quantity and obtains multiple influence values of an operating state of an engine generated through the learning injection. The ECU calculates a learning value for correcting the injection quantity in a normal operation based on the multiple influence values. The ECU determines whether the influence value obtained during the learning injection is within a predetermined range of the influence value. The ECU calculates a provisional learning injection quantity for bringing a subsequent influence value into the predetermined range if the influence value obtained in an early stage of the obtainment is out of the predetermined range. Then, the ECU calculates the other influence values by performing the other learning injections based on the provisional learning injection quantity.

摘要翻译： 燃料喷射系统的电子控制单元（ECU）基于学习喷射量进行学习喷射，并获得通过学习喷射生成的发动机的运转状态的多个影响值。 ECU基于多个影响值计算用于在正常操作中校正喷射量的学习值。 ECU确定在学习注入期间获得的影响值是否在影响值的预定范围内。 如果在获得的早期获得的影响值超出预定范围，则ECU计算用于使后续影响值进入预定范围的临时学习注入量。 然后，ECU通过基于临时学习注入量执行其他学习注入来计算其他影响值。

公开(公告)号：US06907861B2

公开(公告)日：2005-06-21

申请号：US10866254

申请日：2004-06-14

申请人： Masahiro Asano ,  Yoshihiro Narahara ,  Eiji Takemoto

发明人： Masahiro Asano ,  Yoshihiro Narahara ,  Eiji Takemoto

IPC分类号： F02D45/00 ,  F02D41/12 ,  F02D41/14 ,  F02D41/24 ,  F02D41/38 ,  F02D41/40 ,  F02D43/00 ,  F02D7/00

CPC分类号： F02D41/123 ,  F02D41/1497 ,  F02D41/2438 ,  F02D41/2467 ,  F02D41/403 ,  Y02T10/44

摘要： A fuel injection control device of a diesel engine performs a learning injection during a no-injection period, in which a command injection quantity is zero or under. A difference between a variation in the engine rotation speed in the case where the learning injection is performed and a variation in the engine rotation speed in the case where the learning injection is not performed is calculated as a rotation speed increase. A torque proportional quantity is calculated by multiplying the rotation speed increase by the engine rotation speed at the time when the learning injection is performed. An injection correction value is calculated from a deviation between the actual injection quantity, which is estimated from the torque proportional quantity, and the command injection quantity. The command injection quantity is corrected based on the injection correction value.

摘要翻译： 柴油机的燃料喷射控制装置在指令喷射量为零以下的非喷射期间进行学习喷射。 计算在进行学习喷射的情况下的发动机转速的变化与不进行学习喷射的情况下的发动机转速的变化的差异作为转速的增加。 通过在进行学习注入时将转速增加乘以发动机转速来计算转矩比例量。 根据从扭矩比例量估计的实际喷射量与指示喷射量之间的偏差来计算喷射修正值。 基于喷射校正值校正指示喷射量。

公开(公告)号：US06367453B1

公开(公告)日：2002-04-09

申请号：US09703714

申请日：2000-11-02

申请人： Toshihiko Igashira ,  Shuichi Matsumoto ,  Yoshihiro Narahara ,  Masatoshi Kuroyanagi ,  Toshio Kondo

发明人： Toshihiko Igashira ,  Shuichi Matsumoto ,  Yoshihiro Narahara ,  Masatoshi Kuroyanagi ,  Toshio Kondo

IPC分类号： F02M3704

CPC分类号： F02M47/06 ,  F02M47/027 ,  F02M63/0026 ,  F02M63/0036 ,  F02M63/004 ,  F02M63/0045

摘要： In a fuel infection valve, a valve chamber of a three ways valve is selectively communicated to drain and high pressure conduits and also communicated, via a main orifice, to a control chamber for controlling valve opening and closing operations of a nozzle needle. The control chamber may be communicated via the main orifice and the valve chamber to the drain conduit or the high pressure conduit, when a valve body is driven by a piezo actuator to open or close the drain conduit and close or open the high pressure conduit. The control chamber is always communicated via a sub orifice to the high pressure conduit without bypassing the three ways valve. Accordingly, hydraulic pressure in the control chamber is slowly decreased at a valve opening time and is rapidly increased at a valve closing time so that a lift characteristic of the nozzle needle is improved.

摘要翻译： 在燃料感应阀中，三通阀的阀室选择性地连通到排水管和高压管道，并且还经由主孔口连通到用于控制喷嘴针的阀门打开和关闭操作的控制室。 当阀体由压电致动器驱动以打开或关闭排水管道并关闭或打开高压管道时，控制室可以经由主孔口和阀室连通到排水管道或高压管道。 控制室总是经由子孔连接到高压管道而不绕过三通阀。 因此，控制室中的液压在阀打开时缓慢降低，并且在关阀时快速增加，从而提高喷嘴针的提升特性。

公开(公告)号：US5163621A

公开(公告)日：1992-11-17

申请号：US624104

申请日：1990-12-10

申请人： Masaaki Kato ,  Hiroyuki Kano ,  Masahiro Okajima ,  Yoshihiro Narahara ,  Tertada Kojima ,  Shigeki Tojo

发明人： Masaaki Kato ,  Hiroyuki Kano ,  Masahiro Okajima ,  Yoshihiro Narahara ,  Tertada Kojima ,  Shigeki Tojo

IPC分类号： F02M61/10 ,  F02M61/16 ,  F02M61/18

CPC分类号： F02M61/1813 ,  F02M61/163 ,  F02M61/18 ,  F02M61/1833 ,  F02M61/1846

摘要： A fuel injection valve of a diesel engine, comprising a valve body including a concave conical surface in the tip portion of the valve body, and fuel injection holes extending from the concave surface to the outside of the valve body, and a needle valve movable in the valve body and including a cylindrical shaft portion, a first conical surface adjacent to the shaft portion and having a conical angle smaller than that of the concave surface, the lower edge of the first conical surface defining a contact line separably contacting with the concave surface, a second conical surface adjacent to the first surface and having a conical angle substantially equal to that of the concave surface, a third conical surface adjacent to the second surface and having a conical angle greater than that of the concave surface. In case of a smaller lift amount of the needle valve, the fuel flow speed flowing into the fuel injection hole is fast and the atomized fuel injection divergence angle from the injection hole is great, thereby producing active producing mixing of the fuel with the air and enhancing the ignition feature, while in case of a greater lift amount, the fuel flow speed is slow and the atomized fuel injection divergence angle from the injection hole is small, thereby increasing the fuel flow reach and producing an active mixing of the fuel with the air by virtue of the kinetic energy of the atomized fuel flow.

摘要翻译： 一种柴油发动机的燃料喷射阀，包括阀体，该阀体包括在阀体的顶端部分中的凹形锥形表面，以及从阀体的凹面向外部延伸的燃料喷射孔， 所述阀体包括圆柱形轴部分，与所述轴部分相邻并且具有比所述凹形表面小的圆锥角的第一锥形表面，所述第一锥形表面的下边缘限定与所述凹面可分离地接触的接触线 与所述第一表面相邻并且具有基本上等于所述凹表面的圆锥角的第二锥形表面，与所述第二表面相邻并且具有大于所述凹面的圆锥角的锥形角。 在针阀的提升量较小的情况下，流入燃料喷射孔的燃料流速快，并且来自喷射孔的雾化燃料喷射发散角大，从而产生燃料与空气的主动产生混合， 提高点火特征，而在提升量较大的情况下，燃料流速变慢，喷射孔的雾化燃料喷射发散角小，从而增加燃料流量到达并产生燃料与主燃料的主动混合 借助于雾化燃料流的动能，空气。