Apparatus and method for diagnosing reducing-agent supplying device in internal combustion engine
    2.
    发明公开
    Apparatus and method for diagnosing reducing-agent supplying device in internal combustion engine 有权
    装置和方法用于诊断内燃机的还原剂供给装置

    公开(公告)号:EP1176295A3

    公开(公告)日:2003-05-07

    申请号:EP01117850.6

    申请日:2001-07-23

    摘要: Fuel supply system (10) of engine (1) includes a fuel supply pump (11), a common rail (12), fuel injector valves (13), and a cut-off valve (14), and a reducing-agent supplying device which includes a metering valve (16), a fuel introducing nozzle (17) and a secondary fuel supply passage (P2) and which is arranged to introduce a fuel as a reducing agent into an exhaust system (40) of the engine under the control of an electronic engine control unit (80), which control the application of an electric current to the metering valve. The engine control unit constitutes a part of a diagnosing apparatus arranged to diagnose the reducing-agent supplying device, on the basis of a change of an air/fuel ratio (A/F) of an exhaust emission from the engine, which air/fuel ratio is continuously detected during the period of introduction of the fuel into the exhaust system.

    摘要翻译: 发动机的燃料供应系统(10)(1)包括:燃料供给泵(11),共轨(12)中,燃料喷射阀(13),和一个截止阀(14),和一个还原剂供给 装置,其包括被设置为将燃料作为还原剂进入到下所述发动机的排气系统(40)的计量阀(16),燃料导入喷嘴(17)和一个次级燃料供给通道(P2)和所有 其中控制电流的所述计量阀的应用的电子发动机控制单元(80)的控制。 发动机控制单元构成布置成诊断还原剂供给装置,废气排放来自发动机,其中空气/燃料的空气/燃料比(A / F)的变化的基础上,一个诊断装置的一部分 期间连续引入燃料到排气系统的的周期检测到的比率。

    An exhaust gas sampling device
    4.
    发明公开
    An exhaust gas sampling device 审中-公开
    Abgasprobe-Entnahmevorrichtung

    公开(公告)号:EP2813678A1

    公开(公告)日:2014-12-17

    申请号:EP14172198.5

    申请日:2014-06-12

    申请人: Deere & Company

    IPC分类号: F01N3/20

    摘要: An exhaust gas sampling device (110) coupled to an aftertreatment system (120) for treating exhaust gas flowing therethrough. The exhaust gas sampling device comprises an inlet passage (175), an outlet passage (178), a sensor passage (176), and a sensor (119). The inlet passage extracts a portion of the exhaust gas from the aftertreatment system, and the portion of the exhaust gas has a physical property that that is substantially similar to an equivalent physical property of a cross section of the exhaust gas flowing through the aftertreatment system. The sensor passage is positioned fluidly
    between the inlet passage and the outlet passage, and the sensor is in fluid communication with the sensor passage for providing a signal indicative of a property of the portion of the exhaust gas. The outlet passage reintroduces the portion of the exhaust gas back into the aftertreatment system.

    摘要翻译: 一种联接到后处理系统(120)的排气采样装置(110),用于处理流过其中的废气。 排气采样装置包括入口通道(175),出口通道(178),传感器通道(176)和传感器(119)。 入口通道从后处理系统提取一部分排气,并且排气的一部分具有与流经后处理系统的废气横截面的等效物理性质基本相似的物理性质。 传感器通道流体地定位在入口通道和出口通道之间,并且传感器与传感器通道流体连通,以提供指示废气部分特性的信号。 出口通道将废气的一部分重新引入后处理系统。