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    • 10. 发明申请
    • Liquid Discriminating Apparatus and Liquid Discriminating Method
    • 液体鉴别装置和液体鉴别方法
    • US20070209428A1
    • 2007-09-13
    • US10577495
    • 2004-09-06
    • Mitsuhiro NishinaToshikazu KatouHiroyuki Kurita
    • Mitsuhiro NishinaToshikazu KatouHiroyuki Kurita
    • G01N25/18
    • F01N3/206Y02A50/2322Y02T10/24
    • A concentration sensor for detecting a concentration of a liquid reducing agent through heat transfer characteristics between separate two points is provided in a storage tank for storing a liquid supplied to an NOx reduction catalyst. When the concentration read from the concentration sensor is 0% or less, the liquid is discriminated to be water, that is, it is utilized that when water is converted to the concentration of a liquid reducing agent, it is 0%, and it is also 0% even when the concentration is reduced by convection. When the concentration is greater than a predetermined value, it is discriminated that no liquid is present, since it is considered that the output of the sensor is abnormal because of the absence of a liquid in the tank. On the other hand, when the concentration is greater than 0% and less than a predetermined value, the liquid is discriminated to be the liquid reducing agent, provided that the concentration value may include an error.
    • 用于通过分离两点之间的传热特性检测液体还原剂浓度的浓度传感器设置在用于储存供应到NO x还原催化剂的液体的储罐中。 当从浓度传感器读取的浓度为0%以下时,将液体判断为水,即利用当将水转化为液体还原剂的浓度时为0%, 即使当通过对流降低浓度时也是0%。 当浓度大于预定值时,鉴别出不存在液体,因为考虑到传感器的输出由于在罐中没有液体而异常。 另一方面,当浓度大于0%且小于预定值时,只要浓度值可能包括误差,则液体被鉴别为液体还原剂。