Abstract
KEYWORDS – gas injection; thermodynamics of combustion; heat release; exhaust gas emissions; methane combustion
ABSTRACT – Combustion of gaseous fuels in dual-fuel engines requires appropriate way of fuel delivery and preparation of the combustible mixture. The gas injector is typically mounted in the intake channel close to the intake valve. The tests described here were conducted to answer the questions concerning: 1) the impact of the gas injector location in the tangential or helical channel on the creation of the charge; 2) the thermodynamic parameters of the operation of the engine supplied with gaseous fuel through different intake channels; 3) the assessment of toxic components in exhaust gas emissions for two variants of injector locations. In the research it was stated that the supply of gaseous fuel through helical channel increases the intensity of fuel mixing with air resulting in the improvement of some thermodynamic parameters (e.g. IMEP) and in increase of nitrogen oxides concentration.