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

Kevin Koosup Yum, Nicolas Lefebvre and Eilif Pedersen

Applied Energy, 2017, vol. 185, issue P1, 472-481

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.

Keywords: Transient load; Turbocharged diesel engine; Efficiency; NOx emissions (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (1)

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DOI: 10.1016/j.apenergy.2016.10.138

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