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    • 4. 发明公开
    • Method for updating a function for calculating the exhaust pressure of an internal combustion engine
    • Verfahren zum Aktualisieren einer Berechnungsfunktion des Abgasstromdruckes einer Brennkraftmaschine
    • EP2514955A1
    • 2012-10-24
    • EP12165069.1
    • 2012-04-20
    • Magneti Marelli S.p.A.
    • Stola, FedericoDe Cesare, Matteo
    • F02D41/14G01N27/419F01N11/00
    • F02D41/1441F01N11/002F01N2560/025F02D41/1445F02D41/145F02D41/1456F02D41/2474F02D2041/2058Y02T10/47
    • A method of updating a pressure law (P-LAW) providing the exhaust pressure (P EXH ) as a function of the exhaust gas flow rate (Q EXH ); the following steps are included: measuring a first current intensity (Ip 1 ) of a UEGO sensor (13), under conditions of pure air and at a reference exhaust pressure (P EXH ); measuring a second current intensity (Ip 2 ) of the UEGO sensor (13) under conditions of pure air and at a different exhaust pressure (P EXH ); estimating the exhaust gas flow rate (Q EXH ) at the moment of measuring the second current intensity (Ip 2 ); determining a current difference (ΔIp); determining an exhaust pressure (P EXH ) corresponding to the current difference (ΔIp) by using a constructional feature (C-LAW) of the UEGO sensor (13); and using the exhaust gas flow rate (Q EXH ) corresponding to the current difference (ΔIp) and the exhaust gas flow rate (Q EXH ) at the moment of measuring the second current intensity (Ip 2 ) in order to update the pressure law (P-LAW).
    • 提供排气压力(P EXH)作为排气流量(Q EXH)的函数的压力定律(P-LAW)的更新方法; 包括以下步骤:在纯空气和参考排气压力(P EXH)的条件下测量UEGO传感器(13)的第一电流强度(Ip 1); 在纯空气和不同排气压力(P EXH)的条件下测量UEGO传感器(13)的第二电流强度(Ip 2); 估计在测量第二电流强度(Ip 2)时的废气流量(Q EXH); 确定电流差(“Ip”); 通过使用UEGO传感器(13)的结构特征(C-LAW)来确定对应于当前差异(“Ip”)的排气压力(P EXH); 并且使用与测量第二电流强度(Ip 2)时的电流差(Ip)和排气流量(Q EXH)相对应的废气流量(Q EXH)来更新压力定律 (P-LAW)。
    • 10. 发明公开
    • EXHAUST GAS COLLECTING PERFORMANCE JUDGING METHOD AND DEVICE THEREFOR
    • VERFAHREN ZUR BEURTEILUNG DER ABGASAUFFANGLEISTUNG UND VORRICHTUNGDAFÜR
    • EP2261474A1
    • 2010-12-15
    • EP08872422.4
    • 2008-12-19
    • Honda Motor Co., Ltd.
    • SATO, DaisukeMAKI, HidetakaGOSYO, EisakuIZUMIURA, AtsushiIIDA, Jun
    • F01N3/02F02D45/00
    • F01N3/021F01N11/002F01N2550/04F01N2900/1606F01N2900/1614F02D41/1445F02D41/1448F02D2200/0614F02D2200/0812Y02T10/20Y02T10/47
    • An exhaust gas collecting performance determining method which is capable of detecting a particulate collecting performance in an exhaust gas by a filter unit provided in an exhaust system of an internal engine with good accuracy, and a device therefor, is provided. The exhaust gas collecting performance determining device 1 is equipped with a pressure difference detecting unit 17 which detects a before-after pressure difference ΔPdpf of the filter unit 3, a memory unit 21 which memorizes a predetermined number of the detected before-after pressure difference ΔPdpf detected by the pressure difference detecting unit 17 in each region of an operating region sectionalized into a plurality of regions by an operating condition dvol of an internal combustion engine 2, and a determining unit 22 which calculates a pressure difference characteristics of the filter unit 3 with respect to the operating state of the internal combustion engine 2, when the predetermined number of the before-after pressure difference ΔPdpf is stored in all of the region by the memory unit 21, on the basis of the relationship between the memorized before-after pressure difference ΔPdpf and the operating condition dvol at the time when each of the before-after pressure difference ΔPdpf is detected, and which determines that the existence or nonexistence of an abnormality of the filter unit 3 on the basis of the calculated pressure difference characteristics.
    • 一种废气收集性能确定方法,其能够通过设置在内部发动机的排气系统中的过滤器单元以高精度检测排气中的颗粒收集性能及其装置。 排气收集性能判定装置1配备有压力差检测单元17,其检测过滤器单元3的之前的压力差“Pdpf”,存储单元21,其存储预定数量的检测到的前后压力差 通过内燃机2的运转状态dvol,在分压成多个区域的运转区域的各区域中由压力差检测部17检测出的Pdpf和计算出过滤器单元的压力差特性的判定部22 如图3所示,在内燃机2的运转状态下,当存储单元21的所有区域中预先设定的前后压力差“Pdpf”被存储在存储单元21的所有区域中时, - 压力差“Pdpf和每个前后压力dif之间的操作条件dvol 检测到“Pdpf”,并且基于计算出的压力差特性确定过滤器单元3的异常的存在或不存在。