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A comparison of different methods for fuel delivery unevenness detection in Diesel engines

机译：柴油机燃油输送不均匀性检测方法的比较

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摘要

Conventional misfire diagnosis techniques are based on the analysis of the instantaneous engine speed. Although they have proved their efficiency in some operating conditions and for the detection of total misfires, their performance could be insufficient in a near future. This paper presents a comparative study of different alternative detection principles for the detection of slight unevenness between cylinders in the injection process for a turbocharged Diesel engine. The selected techniques are the instantaneous exhaust manifold pressure, the instantaneous turbocharger speed and the mean temperature at the exhaust cylinder ports. All alternative techniques show improved performance and linearity compared to the conventional one, particularly at high engine speed and low load. All these techniques are compared with the conventional approach and main advantages and disadvantages are discussed.
机译：传统的失火诊断技术基于对发动机瞬时转速的分析。尽管它们已在某些运行条件下证明了其效率，并且可用于检测完全失火，但在不久的将来它们的性能可能不足。本文对涡轮增压柴油机喷射过程中气缸之间的轻微不均匀性检测的不同替代检测原理进行了比较研究。选择的技术是瞬时排气歧管压力，瞬时涡轮增压器速度和排气缸端口的平均温度。与传统技术相比，所有替代技术均表现出更高的性能和线性度，尤其是在高发动机转速和低负载的情况下。将所有这些技术与常规方法进行了比较，并讨论了主要的优点和缺点。

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