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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Model-based detection and isolation of faults due to ageing in the air and fuel paths of common-rail direct injection diesel engines equipped with a [lamda] and a nitrogen oxides sensor
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Model-based detection and isolation of faults due to ageing in the air and fuel paths of common-rail direct injection diesel engines equipped with a [lamda] and a nitrogen oxides sensor

机译：基于模型的检测和隔离故障，这些故障是由于配备了λ和氮氧化物传感器的共轨直喷柴油机的空气和燃料路径中的老化而导致的

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摘要

The air and fuel management of modern diesel engines is based on a feedforward control approach. As a consequence, faults of the air or the fuel path have a direct impact on the emissions that cannot be observed nor compensated. Faults due to the ageing of engine parts are very common; thus engines are designed with tolerances large enough to fulfil the emission standards for their entire lifetime. This paper presents a method to locate and quantify engine faults due to the ageing of parts of modern diesel engines in order to help to reduce design tolerances. A relative air-to-fuel ratio and a nitrogen oxides emission sensor have been applied to a test-bench engine, and control-oriented emission models have been developed. Based thereon, a model-based fault detection and isolation system has been implemented. The sensor signals are compared with the models in order to detect a possible fault, and fault location and size are estimated by means of a bank of extended Kalman filters, one for each fault considered. Results from the New European Driving Cycle show that the developed control-oriented models are accurate, and the faults can be correctly detected and isolated. [PUBLICATION ABSTRACT]
机译：现代柴油发动机的空气和燃料管理基于前馈控制方法。结果，空气或燃料通道的故障直接影响到无法观察到或无法补偿的排放。发动机零件老化引起的故障非常普遍；因此，发动机的设计公差要足以满足其整个使用寿命的排放标准。本文提出了一种定位和量化由于现代柴油发动机部件老化而导致的发动机故障的方法，以帮助降低设计公差。相对空燃比和氮氧化物排放传感器已应用于试验台发动机，并且已经开发了面向控制的排放模型。基于此，已经实现了基于模型的故障检测和隔离系统。将传感器信号与模型进行比较，以检测可能的故障，并通过一组扩展的卡尔曼滤波器估算故障的位置和大小，每个考虑的故障均使用一个。新欧洲行驶周期的结果表明，开发的面向控制的模型是准确的，并且可以正确地检测和隔离故障。 [出版物摘要]

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