公开(公告)号：US20130199283A1

公开(公告)日：2013-08-08

申请号：US13514712

申请日：2010-11-05

申请人： Lu Chen ,  Eberhard Schnaibel ,  Andreas Koring ,  Richard Hoeberg ,  Michael Fey

发明人： Lu Chen ,  Eberhard Schnaibel ,  Andreas Koring ,  Richard Hoeberg ,  Michael Fey

IPC分类号： F02D41/14

CPC分类号： F02D41/1454 ,  F02D41/008 ,  F02D41/0082 ,  F02D41/1456 ,  F02D41/1495 ,  F02D2041/1432

摘要： The invention relates to a method and device for diagnosing deviations in a single cylinder lambda control in an internal combustion engine having at least two cylinders and an exhaust gas sensor designed as a broadband lambda sensor, wherein a pump current is evaluated by means of a pump cell and said pump current is used at least temporarily for an individual cylinder lambda control. According to the invention, a pump voltage or a pump voltage change is determined via the pump cell in addition to the pump current and said value is transmitted to a diagnosis apparatus. Deviations in the single cylinder lambda control can thus be better diagnosed without additional material expense according to the invention, which provides advantages in particular in respect of tightened rulemaking in on-board diagnosis. A preferred application of the method is the use in internal combustion engines having multi-bank exhaust systems.

摘要翻译： 本发明涉及一种用于诊断具有至少两个气缸的内燃机中的单气缸λ控制的偏差的方法和装置，以及设计为宽带λ传感器的废气传感器，其中泵电流通过泵 电池和所述泵电流至少临时用于单独的气缸λ控制。 根据本发明，泵电压或泵电压变化除了泵电流之外经由泵电池确定，并且所述值被传送到诊断装置。 因此，根据本发明，可以更好地诊断单缸λ控制中的偏差而不需要额外的材料费用，其特别地在车载诊断中的紧固规则制定方面提供了优点。 该方法的优选应用是在具有多排排气系统的内燃机中的应用。