Experimental Investigation of Combustion Timing of HVO, RME and Diesel Fuel in a Euro6 Car Engine during Transient Driving Cycles
The current targets to decrease greenhouse gases production, to reduce fossil fuel dependency and to gain energy security and sustainability are driving demand on combustion engine fuels from renewable sources. This effort resulted in utilization of first generation biofuels. Unfortunately, these fuels brought new dilemmas and challenges in general, such as food production competition and land use and, in case of fatty acid methyl esters for compression ignition engines, also technical challenges such as storage stability and deposit formation. Utilization of particle filters and sensitive fuel systems are driving effort to develop compatible renewable biofuels which can be utilized at higher than current shares. Hydrotreated vegetable oils (HVO), as industrially produced biofuels, exhibit some beneficial properties compared to traditional fatty-acid methyl esters especially in terms of oxidation stability, injector fouling, energy content and cetane number.