| Issue |
MATEC Web Conf.
Volume 234, 2018
BulTrans-2018 – 10th International Scientific Conference on Aeronautics, Automotive and Railway Engineering and Technologies
|
|
|---|---|---|
| Article Number | 03007 | |
| Number of page(s) | 5 | |
| Section | Internal Combustion Engines | |
| DOI | https://doi.org/10.1051/matecconf/201823403007 | |
| Published online | 21 November 2018 | |
Experimental study of multiple pilot injection strategy in an automotive direct injection diesel engine
1 Technical University – Sofia, Department of combustion engines, automobiles and transport, 1000 Sofia, Bulgaria
2 Laboratoire de Chimie Moléculaire, Génie des procédés Chimiques et Energétique, EA7341, Conservatoire National des Arts et Métiers, HESAM Université, 75003 Paris, France
3 University of Zilina, Faculty of Mechanical Engineering, Univerzitna 8215/1, 010 26, Žilina, Slovakia
* Corresponding author: plamen_punov@tu-sofia.bg
The pilot injection strategy is a widely used approach for reducing the noise of the combustion process in direct injection diesel engines. In the last generation of automotive diesel engines up to several pilot injections could occur to better control the rate of heat release (ROHR) in the cylinder as well as the pollutant formation. However, determination of the timing and duration for each pilot injection needs to be precisely optimised. In this paper an experimental study of the pilot injection strategy was conducted on a direct injection diesel engine. Single and double pilot injection strategy was studied. The engine rated power is 100 kW at 4000 rpm while the rated torque is 320 Nm at 2000 rpm. An engine operating point determined by the rotation speed of 1400 rpm and torque of 100 Nm was chosen. The pilot and pre-injection timing was widely varied in order to study the influence on the combustion process as well as on the fuel consumption.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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