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Analysis of the share of natural gas in the total fuel supply dose on the combustion process in a CRDI engine

Wierzbicki Sławomir, Boruta Grzegorz, Konieczny Łukasz, Łazarz Bogusław

Transport Problems

2022

T. 17, z. 1

141--150

Natural gas is one of the potential combustion engine fuels whose proportion in the overall energy balance is expected to increase. Owing to some of its properties, its use requires a dual-fuel supply system; thus, the use of natural gas as a fuel for diesel engines is currently limited. Systems that supply gas fuel to diesel engines do not usually interfere with the engine control system. This solution significantly reduces system-installation costs. However, as demonstrated in the present study, it considerably changes the course of the combustion process, which increases thermal and mechanical loads. In this case, the combustion process can be controlled by changing the liquid fuel injection pressure or advancing the injection angle. This, however, requires interference with the engine control system.