Abstract
The aim of the research was to determine the impact of biofuels from waste materials of plant and animal origin on the parameters of the common rail power supply system in the utility engine. The tests included identification of power system operation parameters in the whole load range of the tested engine, taking into account the limit and diagnostic parameters of the injectors operation. Then, for certain parameters, the engine injectors were tested on the test bench: injection pressure in the range of 25-135 MPa, injection time in the range of 200-1600 μs. In the tests, as reference fuel for testing injectors were used diesel fuel and three types of methyl esters of higher fatty acids: vegetable, animal and WCO origin. The measurements for individual fuels were made in the operating temperature range 30-60°C. The tests have shown significant changes in the volume of the fuel injection rates depending on the fuel used. Particularly, visible changes concerned the power system operation parameters for high engine speeds and the maximum working pressure of the common rail system in the engine.
Highlights
Today, it is estimated that transport generates about 20% of global energy demand
2 Research focus The aim of the research was to determine the impact of biofuels from waste materials of plant and animal origin on the parameters of the common rail power supply system in the utility engine
4.1 Injection pressure of the fuel supply system The obtained values of fuel injection pressure at different rotational speeds allowed us to distinguish between three characteristic curves of pressure curves as a function of load, which were presented in Figures 1 to 3
Summary
It is estimated that transport generates about 20% of global energy demand. Due to high energy efficiency, high torque, high energy density of fuel in the different means of transport, self-ignition internal combustion engines play a dominant role [1, 2]. The growing, restrictive requirements for the emission of toxic exhaust components and the increase in requirements for improving the efficiency of diesel engines, in the context of reducing CO2 emissions, necessitate the introduction of new design solutions (e.g. diesel particulate filters, various types of catalysts, use of high-pressure fuel systems) [4, 5] or the use of new combustion systems [6] This causes complications in the construction of motors and significantly reduces the reliability of drive units, increases maintenance activities (e.g. for units with SCR system) [7], and leads to potential interruption of transport processes. The tests were based on an internal combustion engine, which is used in heavy road vehicles, farm tractors or industrial engines
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