BEVx-2T Funktion - Functional test on the suitability of 2-stroke combustion for alternative fuels in the car Hybrid

Project: Research project

Project Details


The main problems of E-vehicles (EV) are their range, high costs and high weight. An alternative to purely electrically driven passenger cars is hybrid technology, serving as a bridge technology with increasing importance due to the growing sale numbers. The hybrid technology is able to combine the advantages of EVs (reduction of pollutant emissions in congested areas) with advantages of internal combustion engines (higher range). The use of a smaller, lighter and cost-effective ICE increases the competitiveness of the entire product. With their electric range of 50km, hybrid vehicles are able to cope with 90% of all travels. As ICE loses importance in the entire drive train, the request for cheaper, lighter and smaller units is obvious to be competitive concerning costs, weight and packaging. Biofuels of the second generation have the potential to compensate 30% of the primary energy demand. This complies with the energy demand of the transport sector. By electrification, the demand for fuels for transport reasons will certainly decrease. This increases the potential of bio fuels gaining a higher share in operating an ICE.
This aim has to be reached with the implementation of a uniflow scavenging 2-stroke engine with high pressure direct injection, combining the advantages of the 2-stroke engine with regard to weight, costs, packaging with the level of emission and oil consumption of a 4-stroke Otto engine according to the current state-of-the-art. It is expected that the 2-stroke principle with high pressure direct injection will positively influence the use of bio-fuels, as Ethanol and 2-Butanol. Alcoholic fuels have a positive impact on particulate and NOx emissions. Their evaporation characteristics are the limiting factor in reaching smaller particulate emissions. The higher charge motion and the higher temperature level of the 2-stroke engine have a positive influence on internal mixture formation.
Beside the investigations concerning the combustion process with bio-fuels, studies covering oil consumption and the wear of cylinder/piston will also be carried out on a 1-cylinder research engine only focusing on the cylinder / piston pairing. The research activities are TRL3. The aim is to prove the experimental functionality on the basis of the component level.
The specific goal of the project is the proof of functionality of the 2-stroke combustion process with bio-fuels and the achievement (including quantification) of preferably low oil consumption. Therewith, it has to be assessed if the findings/results justify the follow-up of the project to be able to develop a functional prototype in a next step.
Effective start/end date1/02/1831/01/21