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High particulate emissions from diesel vehicles showing high strength and reliability have led to the evolution of many new technologies as well as the formulation of legal restrictions. One of the ways to reduce emissions from combustion of diesel fuel is to use the dual fuel system. Methane and hydrogen are most often considered as an additional fuel for use in a diesel engine. The combustion process and thus the emission are determined i.e. by fuel atomization and injection methods. The motivation to undertake the research is the need to define how the applied hydrogen injection will influence particulate emissions during the combustion process in a dual fuel diesel engine. Research has been conducted to compare the particulate emissions during engine operation with early and late direct injection of hydrogen. The research object is a four-cylinder, four-stroke ADCR engine produced by Andoria-Mot with a displacement of 2,636 cm3.

The paper presents the simulation of engine model that was made in AVL Boost Software. The model assumption was the indirect additive supplying hydrogen to the SI engine. The simulation test model of a spark ignition engine, have been developed in the AVL Boost software. The model is based on a real four-cylinder engine, codenamed A14XER that meets the Euro 5 emission standard. This engine is used in passenger vehicles Opel Corsa. In order to most accurate reflection of real engine, the model was developed based on data provided by the engine manufacturer. In the simulation studies two-zone combustion model Vibe (Vibe 2 zone) was used. A General Species Transportation model was also defined, which allowed to use the fuel as a blend of gasoline and hydrogen to supply the engine. Calculations were performed for a full load for different values of rotational speed of the engine crankshaft (from 1000 rpm to 6400 rpm).

Nowadays, there is a permanent need to develop alternative fuel production and combustion technologies. The general objective indicated in Directive 2009/28/EC for biofuels in Poland is application in transport 10% of renewable energy by 2020 and 20% by 2030. In Poland, it can be achieved by adding bio-components to liquid fuels. Flexible fuel vehicles are not as popular in Europe as in Brazil, so further ethanol processing is justified. The researched synthetic gasoline was obtained from bioethanol at the Ekobenz Company Ltd. in Poland. In 2008, Sasol launched its 100% synthetic jet fuel produced by CTL (Coal to Liquids). A variety of engine concepts was tested and evaluated in terms of the key criteria for use as a range extender developed by AVL Company. The Wankel engine has been selected for the vehicle prototype as the most compact and of excellent NVH behaviour. The use of this engine in light helicopters is also considered.