Fuel pressure control apparatus
    4.
    发明公开
    Fuel pressure control apparatus 审中-公开
    用于燃料压力控制

    公开(公告)号:EP1304471A3

    公开(公告)日:2004-05-19

    申请号:EP03001464.1

    申请日:2000-02-03

    IPC分类号: F02D41/38

    摘要: The present invention proposes a fuel pressure control apparatus for a high-pressure fuel injection system which sufficiently reduces a fuel pressure in an accumulator line (20) while preventing the high-pressure fuel injection system from being adversely affected. The fuel pressure control apparatus for the high-pressure fuel injection system is equipped with an accumulator line (20) for accumulating fuel supplied from a fuel pump (30) at a high pressure and supplying the fuel to fuel injection valves (12), and with a relief valve (22) for discharging fuel in the accumulator line (20). Furthermore, the apparatus is equipped with fuel pressure control means (68) for detecting a fuel pressure in the accumulator line (20) and driving the relief valve (22) so as to reduce the fuel pressure in accordance with a pressure reduction requirement based on a comparison between the detected fuel pressure and a target pressure. An electronic control unit (60) determines a detection timing of the fuel pressure in such a manner as to prevent a period during which the fuel pump (30) force-feeds fuel from overlapping with the detection timing of the fuel pressure by detection means (68).

    Method of determining abnormality in high-pressure fuel injection device
    6.
    发明公开
    Method of determining abnormality in high-pressure fuel injection device 有权
    在einer Hochdruckbrennstoffeinspritzvorrichtung的Verfahren zur Feststellung vonAbnormitäten

    公开(公告)号:EP1036923A2

    公开(公告)日:2000-09-20

    申请号:EP00104931.1

    申请日:2000-03-08

    IPC分类号: F02B77/08

    摘要: The present invention provides a method of determining abnormality, which is capable of specifying a fuel force-feed system subject to an abnormality without causing fluctuations of a fuel pressure in an accumulator line. A fuel pump (30) is provided with a first supply pump (50a) and a second supply pump (50b), and these supply pumps (50a, 50b) alternately force-feed fuel to a common rail (20). Respective fuel injection valves (12) carry out fuel injection based on a fuel pressure (rail pressure) in the common rail (20). An ECU (60) detects a rail pressure rise amount during a fuel force-feed period and calculates an estimated value of rail pressure rise amount based on a force-feed command value for the fuel pump (30). The ECU (60) determines which one of the supply pumps (50a, 50b) is in the process of force-feeding fuel in a certain fuel force-feed period, and determines individually the occurrence of an abnormality in the respective supply pumps (50a, 50b) based on the detected value and the estimated value of rail pressure rise amount.

    摘要翻译: 本发明提供一种确定异常的方法,其能够指定经受异常的燃料供给系统而不引起蓄压器管线中的燃料压力的波动。 燃料泵(30)设置有第一供给泵(50a)和第二供给泵(50b),这些供给泵(50a,50b)交替地将燃料供给到共轨(20)。 各燃料喷射阀(12)基于共轨(20)中的燃料压力(轨道压力)进行燃料喷射。 ECU(60)在燃料供给期间检测轨道压力上升量,并且基于燃料泵(30)的力进给指令值计算轨道压力上升量的估计值。 ECU(60)确定供给泵(50a,50b)中的哪一个处于在一定的燃料供给期间的供给燃料的过程中,分别确定各供给泵(50a)中的异常的发生 ,50b),基于检测值和轨道压力上升量的估计值。

    A cylinder discrimination system utilizing fuel injection pump and its fuel injection pump
    7.
    发明公开
    A cylinder discrimination system utilizing fuel injection pump and its fuel injection pump 失效
    使用的燃料喷射泵和燃料喷射泵气缸识别的系统

    公开(公告)号:EP0893595A3

    公开(公告)日:2000-05-31

    申请号:EP98113693.0

    申请日:1998-07-22

    IPC分类号: F02D41/40

    摘要: In order to provide a fuel injection pump capable of discriminating a cylinder, the fuel injection pump (1) capable of supplying fuel to engine (2) having a plurality of cylinders is provided with reference signal generating system (7, 35) capable of generating a plurality of reference signals corresponding to a plurality of cylinders. Of a plurality of reference signals, a specific reference signal differs from the reference signals other than said specific reference signal. The time point at which the specific reference signal is generated is related to a predetermined cylinder out of a plurality of cylinders, whereby the specific cylinder can be identified by means of a single fuel injection pump by discriminating the specific reference signal by discrimination means (71). Therefore, where the difference in fuel injection rate as to a plurality of cylinders is measured during the manufacturing process of the fuel injection pump, it becomes possible to correct the fuel injection rate to reduce the difference in the fuel injection rate by individual cylinders.

    A cylinder discrimination system utilizing fuel injection pump and its fuel injection pump
    8.
    发明公开
    A cylinder discrimination system utilizing fuel injection pump and its fuel injection pump 失效
    系统ZERO Zylinderidentifikation unter Verwendung einer Kraftstoffeinspritzpumpe und Kraftstoffeinspritzpumpe

    公开(公告)号:EP0893595A2

    公开(公告)日:1999-01-27

    申请号:EP98113693.0

    申请日:1998-07-22

    IPC分类号: F02D41/40

    摘要: In order to provide a fuel injection pump capable of discriminating a cylinder, the fuel injection pump (1) capable of supplying fuel to engine (2) having a plurality of cylinders is provided with reference signal generating system (7, 35) capable of generating a plurality of reference signals corresponding to a plurality of cylinders. Of a plurality of reference signals, a specific reference signal differs from the reference signals other than said specific reference signal. The time point at which the specific reference signal is generated is related to a predetermined cylinder out of a plurality of cylinders, whereby the specific cylinder can be identified by means of a single fuel injection pump by discriminating the specific reference signal by discrimination means (71). Therefore, where the difference in fuel injection rate as to a plurality of cylinders is measured during the manufacturing process of the fuel injection pump, it becomes possible to correct the fuel injection rate to reduce the difference in the fuel injection rate by individual cylinders.

    摘要翻译: 为了提供能够区分气缸的燃料喷射泵,能够向具有多个气缸的发动机(2)供给燃料的燃料喷射泵(1)设置有能够产生的参考信号发生系统(7,35) 对应于多个气缸的多个参考信号。 在多个参考信号中,特定参考信号与除了所述特定参考信号之外的参考信号不同。 产生特定参考信号的时间点与多个气缸中的预定气缸相关,由此可以通过单个燃料喷射泵来识别特定气缸,通过鉴别装置识别特定参考信号(71 )。 因此,在燃料喷射泵的制造过程中测量多个气缸的燃料喷射率的差异的情况下,可以校正燃料喷射率,以减少各个气缸的燃料喷射率的差异。