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    • 46. 发明申请
    • METHOD FOR DIAGNOSING AN EXHAUST GAS CATALYTIC CONVERTER, AND MOTOR VEHICLE
    • METHOD FOR A废气催化和机动车的诊断
    • WO2015110247A3
    • 2015-09-17
    • PCT/EP2014079390
    • 2014-12-29
    • VOLKSWAGEN AG
    • VELDTEN BURKHARDKULASZEWSKI MACIEJ
    • F02D41/12F01N11/00F02D41/00F02D41/14F02D41/22
    • F02D41/0055F01N3/208F01N11/00F01N11/007F01N2430/00F01N2550/02F01N2560/026F01N2610/02F01N2900/1402F01N2900/1621F02D41/123F02D41/1461F02M26/15Y02A50/2325Y02T10/24Y02T10/47
    • The invention relates to a method and to a motor vehicle for diagnosing an exhaust gas catalytic converter (28), which is arranged in an exhaust gas tract (20) of an internal combustion engine (12) and is suitable for converting at least one exhaust gas component, wherein the exhaust gas tract (20) has an exhaust gas sensor (48) arranged upstream of the exhaust gas catalytic converter (28) and has an exhaust gas recirculation system (38), which is designed to remove at least part of the exhaust gas from an exhaust gas duct (24) of the exhaust gas tract (20) downstream of the exhaust gas catalytic converter (28) and to feed the removed exhaust gas to the internal combustion engine (12). The method comprises the following steps: measuring a first concentration (NOX1) of the exhaust gas component upstream of the exhaust gas catalytic converter (28) by means of the exhaust gas sensor (48) during fueled operation of the internal combustion engine (12), recirculating at least part of the exhaust gas by means of the exhaust gas recirculation system (38) during unfueled overrun of the internal combustion engine (12), measuring a second concentration (NOX2) of the exhaust gas component by means of the exhaust gas sensor (48) during the unfueled overrun of the internal combustion engine (12), and determining a state of the exhaust gas catalytic converter (28) in dependence on the first and second concentrations (NOX1, NOX2) of the exhaust gas component.
    • 本发明涉及一种方法和用于在(12)布置在内燃机的排气道(20),诊断和用于将至少一个排气组件适当催化转换器(28)的机动车辆,其中,所述排气道(20),其设置在催化转化器中的一个的上游(28)的排气传感器 (48)和其上形成有废气再循环系统(38),将要采取的至少从所述排气道(20)的排气通道(24)的催化转化器(28)下游的排气气体的一部分,并供给到内燃发动机(12)。 该方法包括以下步骤: - 内燃发动机(12)的烧成模式期间测量由所述排气传感器(48)的装置中的催化转化器(28)上游的排气气体组分的第一浓度(NOX1), - 回收至少一个经由所述排气再循环系统的排气的一部分(38 )所述内燃机(12)的未烧成的超限操作期间, - 根据所述确定(在催化转化器的状态28) - (测量废气组分的第二浓度NOX2)由内燃发动机(12)的未击发超限运转时的排气传感器(48)的装置,以及 第一和第二浓度的废气的组分(NOX1,NOX2)