Retrofitting of tractors for multi fuel application
11 Oktober 2017 – In the agriculture the widening of the application of vegetable oil as a fuel in tractors could contribute to more sustainability and climate protection in the framework of a resource-friendly bio-economy. However, the compatibility of fuel-leading components with vegetable oil fuel must be checked, so that the operational safety and lifetime duration of tractors and other agricultural machinery can be guaranteed. In order to utilise vegetable oil from rape as a part of a Multi-Fuel application strategy, a research project investigates in particular the interaction between fuels and diesel injectors.
In particular in modern injectors with high injection pressure and small clearings internal and external depositions can occur during the application of biogenic fuels. Under certain circumstances this can lead to malfunctions and shutdown times of agricultural machinery. For both types of deposits, critical operating points (driving cycles) are to be identified which can lead to forced deposition. Part of the investigation will be fuel blends of vegetable oil and conventional diesel fuel which occur in the real operation during refueling. In addition, the behaviour of different injectors used in agricultural machinery is examined.
On the basis of the investigation results, additive-aided “keep clean” strategies for the avoidance of deposition formation are to be developed on the one hand. On the other hand, a tailored injector regeneration during operation is to be developed. The “clean-up” strategies with additive support already identified in previous projects are to be led to application maturity. For the successful application of a regeneration an early indication is to be developed on the base of characteristic values of the formation of internal and external deposits. Research partners are the Oel Waerme Institute OWI, the Technology and Support Centre (TFZ), the regineering GmbH, the ERC Additiv GmbH and the TEC4FUELS GmbH. Industrial partners of the project are the companies DEUTZ AG and John Deere as well as the Union for the Promotion of Oil and Protein Plants (UFOP).