公开(公告)号：US06408686B1

公开(公告)日：2002-06-25

申请号：US09479547

申请日：2000-01-07

申请人： Kevin Verne Tallio ,  Timothy Chanko ,  Yitzhak Isaac Henig

发明人： Kevin Verne Tallio ,  Timothy Chanko ,  Yitzhak Isaac Henig

IPC分类号： G01M1900

CPC分类号： F01N3/0842 ,  F01N9/002 ,  F01N11/00 ,  F01N13/009 ,  F01N2550/00 ,  F01N2550/04 ,  F02B2075/125 ,  Y02T10/47

摘要： A method of monitoring exhaust gas flow through an exhaust system of an internal combustion engine comprising the steps of generating a flow efficiency value (KE), 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 (KE) is a non-dimensional parameter that characterizes the level of restriction in the exhaust system independent of the engine operating conditions.

摘要翻译： 一种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：产生流量效率值（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。 所得到的流动效率值（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。

公开(公告)号：US06378359B1

公开(公告)日：2002-04-30

申请号：US09479534

申请日：2000-01-07

申请人： Douglas A. Dobson ,  Jeffrey Scott Hepburn ,  Michael Igor Kluzner ,  Robert Joseph Jerger ,  Timothy Chanko ,  William Lewis Henderson Watkins

发明人： Douglas A. Dobson ,  Jeffrey Scott Hepburn ,  Michael Igor Kluzner ,  Robert Joseph Jerger ,  Timothy Chanko ,  William Lewis Henderson Watkins

IPC分类号： G01M1900

CPC分类号： F01N11/00 ,  F01N2550/00 ,  F01N2550/20 ,  Y02T10/22 ,  Y02T10/47

摘要： A system and method of normalizing an emissions threshold catalytic brick 302 without a mileage accumulation step is used to evaluate an on-board diagnostics for an exhaust system. The method comprises normalizing a emissions threshold catalytic brick 302 by placing the emissions threshold catalytic brick 302 in a exhaust gas circulation oven, such as a retort chamber 300, immediately after an oven-aging and chemical aging process wherein the emissions threshold catalytic brick 302 is saturated with a exhaust gas at a predetermined rate and at a predetermined temperature for a specified period of time based upon the characteristics desired for the emissions threshold catalytic brick. Additionally, a method for evaluating on-board diagnostics of an exhaust system using an emissions threshold catalytic brick 302 based upon the characteristics of the exhaust system that it will be placed in is also contemplated.

摘要翻译： 使用不使用里程积累步骤对排放阈值催化砖302进行归一化的系统和方法来评估排气系统的车载诊断。 该方法包括通过将排放阈值催化剂砖302放置在排气循环炉（例如蒸煮室300）中，在炉老化和化学老化过程之后立即使排放阈值催化砖302标准化，其中排放阈值催化砖302为 基于排放阈值催化砖所需的特性，以预定的速率和在预定温度下将废气饱和一定时间。 另外，还考虑了一种基于排放系统的特征来评估排气系统的车载诊断方法，该排气系统使用排放阈值催化砖302。