Use of Gas Desorption Effect in Injection Systems of Diesel Engines

Maciej Bajerlein, Wojciech Karpiuk and Rafał Smolec
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Maciej Bajerlein: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznan, Poland
Wojciech Karpiuk: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznan, Poland
Rafał Smolec: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznan, Poland

Energies, 2021, vol. 14, issue 1, 1-22

Abstract: The article presents a concept of improving operation of the engine with the effect of gas desorption from a solution with nucleation of gas bubbles. This concept consists in dissolving gas in diesel fuel until the solution is in equilibrium. At a later stage, the phenomenon is reversed, and the gas is released from the solution during its injection into the combustion chamber. The purpose of the study is to present the idea of the desorption effect along with a thermodynamic analysis of the process and to study its impact on the operation of a diesel engine. The article also describes the most important features of the injection pump adapted to employ the desorption effect, which is a proprietary, patented solution. The conducted engine preliminary tests concerned the most important parameters of the engine’s operation (indicated pressure course, pressure growth rate, heat release rate, etc.) and the emission of harmful compounds (PM—particulate matter, CO, HC, and NO x —nitrogen oxides). A significant reduction of PM, CO, and HC, with a simultaneous increase in NO x emissions obtained in tests, confirmed that the desorption effect facilitated engine operation.

Keywords: injection systems; gas dissolution; exhaust gas; desorption effect; injection pump; high-pressure pump; pump with hypocycloid drive; compression ignition engines (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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