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An experimental investigation of the effects of cyclic transient loads on a turbocharged diesel engine

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  • Yum, Kevin Koosup
  • Lefebvre, Nicolas
  • Pedersen, Eilif

Abstract

This paper presents the results of the experimental investigation on the effect of cyclic transient loads on a turbocharged diesel engine with respect to fuel efficiency and NOx emissions. The transient loads in this test program are time varying torque in the form of a sinusoidal wave with a fixed amplitude at different frequencies and different mean values. The measurements from the transient tests are compared to the cases of constant loads and to estimations provided by a quasi-steady mapping. The largest influences are found at the lowest mean load (24.6%) and the highest frequency (0.2Hz). For fuel efficiency, the transient deviation is 6.7%, while the estimation error is −2.9%. For NOx measurement in volume fraction, they are −9.1% and 4.3%, respectively. The results also show that the magnitude of the effect grows as the mean power load decreases. Finally, a graphical method is presented to evaluate the effect of load shifting operations for a diesel engine using the steady-state fuel consumption rate curve.

Suggested Citation

  • Yum, Kevin Koosup & Lefebvre, Nicolas & Pedersen, Eilif, 2017. "An experimental investigation of the effects of cyclic transient loads on a turbocharged diesel engine," Applied Energy, Elsevier, vol. 185(P1), pages 472-481.
  • Handle: RePEc:eee:appene:v:185:y:2017:i:p1:p:472-481
    DOI: 10.1016/j.apenergy.2016.10.138
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    References listed on IDEAS

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    1. Giakoumis, E.G. & Alafouzos, A.I., 2010. "Study of diesel engine performance and emissions during a Transient Cycle applying an engine mapping-based methodology," Applied Energy, Elsevier, vol. 87(4), pages 1358-1365, April.
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    1. Deng, Yuanwang & Liu, Huawei & Zhao, Xiaohuan & E, Jiaqiang & Chen, Jianmei, 2018. "Effects of cold start control strategy on cold start performance of the diesel engine based on a comprehensive preheat diesel engine model," Applied Energy, Elsevier, vol. 210(C), pages 279-287.

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