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    • 82. 发明公开
    • Exhaust gas purifying catalyst for internal combustion engine
    • Abgasreinigungskatalysatorfüreine Brennkraftmaschine
    • EP1403479A1
    • 2004-03-31
    • EP03021773.1
    • 2003-09-25
    • NISSAN MOTOR COMPANY, LIMITED
    • Nishizawa, ToruKitahara, Yasuhisa
    • F01N11/00F01N3/08F02D41/02B01D53/94
    • F01N3/0842B01D53/9495F01N3/0814F01N3/0821F01N11/00F01N13/009F01N2550/02F01N2550/03F01N2550/04F01N2570/04F01N2570/14F02B37/00F02D41/028F02D41/06F02D41/146F02D41/22Y02A50/2344Y02T10/24Y02T10/47
    • An exhaust gas purifying system for an internal combustion engine (1) of an automotive vehicle. The exhaust gas purifying system includes an exhaust gas purifying catalyst (13) disposed in an exhaust gas passage (7) of the engine to remove an exhaust gas component. A concentration sensor (15) is disposed in the exhaust gas passage downstream of the exhaust gas purifying catalyst (13) to detect a concentration of the exhaust gas component. Additionally, a control unit (10) is provided programmed to carry out (a) detecting an activity transition time at which the exhaust gas purifying catalyst (13) changes from an inactive state to an active state, in accordance with the concentration of the exhaust gas component detected by the concentration sensor (15), and (b) judging a deterioration of the exhaust gas purifying catalyst (13) at the activity transition time.
    • 一种用于内燃机的废气净化系统,具有排气净化催化剂,其设置在发动机的废气通道中以除去排气成分; 浓度传感器,设置在催化剂下游的废气通道中,以检测该组分的浓度; 以及控制单元,其被编程为检测活动转变时间并且判断在过渡时间的催化剂劣化。 一种用于内燃机的排气净化系统,包括:排气净化催化剂,其设置在发动机的废气通道中以除去排气成分; 浓度传感器,设置在排气净化催化剂下游的排气通路中,以检测排气组分的浓度; 以及控制单元,其被编程为根据由浓度传感器检测的排气成分的浓度来检测排气净化催化剂从非活动状态变为活动状态的活动转变时间,并被编程以判断劣化 的废气净化催化剂。 还提供了一种独立的权利要求,其用于净化从设置在发动机的废气通道中的排气净化催化剂排出的排气净化催化剂排出的废气以去除废气成分的方法,包括检测废气浓度 排气净化催化剂下游的排气通路中的成分; 根据检测出的废气成分的浓度,检测废气净化催化剂从非活性状态变为活性状态的活性转移时间; 判断活性转移时的排气净化催化剂的劣化。
    • 86. 发明公开
    • Exhaust system monitoring
    • Überwachungssystemfüreine Abgasanlage
    • EP1114922A1
    • 2001-07-11
    • EP00311481.6
    • 2000-12-20
    • Ford Global Technologies, Inc.
    • Chanko, TimothyHenig, Yitzhak IsaacTallio, Kevin Verne
    • F01N11/00F01N9/00
    • F01N3/0842F01N9/002F01N11/00F01N13/009F01N2550/00F01N2550/04F02B2075/125Y02T10/47
    • A method of monitoring exhaust gas flow through an exhaust system of an internal combustion engine comprises the steps of generating a flow efficiency value (K E ), comparing the flow efficiency value to a reference efficiency value, and if the reference efficiency value is exceed by a predetermined amount, then setting a flow fault indicator flag. In one aspect of the invention, the flow efficiency value is generated as a ratio of the magnitude of the exhaust gas flow restriction, and the mass flux through the engine. The magnitude of the exhaust gas flow restriction is represented by the pressure drop across the exhaust system, and the mass flux through the engine is determined as a function of the mass airflow rate and exhaust gas density. The resulting flow efficiency value (K E ) is a non-dimensional parameter that characterises the level of restriction in the exhaust system independent of the engine operating conditions.
    • 监测通过内燃机的排气系统的废气流动的方法包括以下步骤:产生流动效率值(KE),将流动效率值与参考效率值进行比较,以及如果参考效率值超过 预定量,然后设置流量故障指示标志。 在本发明的一个方面,流量效率值是作为废气流量限制的大小与通过发动机的质量通量的比率而产生的。 废气流量限制的大小由排气系统上的压降表示,并且通过发动机的质量通量被确定为质量气流速率和废气密度的函数。 所产生的流动效率值(KE)是一个无量纲参数,其特征在于独立于发动机操作条件的排气系统中的限制水平。