CC BY
80
UDC 621.436
DEVELOPMENT DUAL-FUEL DIESEL INJECTION SYSTEM FOR TRACTORS CLASS 14 KN AUTOMATIC ADJUSTMENT OF THE MIXED FUEL
Godina E.D., Associate Professor
North-Eastern Federal University named after M.K. Ammosov, Neryungri, Russia
E-mail: godina-elena@mail.ru
Sidorov E.A., Associate Professor Ulyanovsk State Agricultural Academy named after P.A. Stolypin, Ulyanovsk, Russia
E-mail: sidorovevgeniy@yandex. ru
ABSTRACT
Described several options for the design development of dual-fuel diesel injection system of the tractor MTZ-80 and proposed a system with automatic control of drop-in fuels, providing the work on the mineral and vegetable and mineral fuels.
KEY WORDS
Diesel; Oil; Fuel; Performance; Mixer; Power supply system; Metering; Diaphragm mechanism.
The main consumer of motor fuels derived from petroleum is automotive engineering. Moreover, the proportion of such mobile equipment fitted with a piston diesel engine in the overall structure of automobile and tractor fleet is increasing every year. [1]
In the energy strategy of the Russian Federation for the period up to 2020 a lot of attention paid to the need for renewable energy sources and, in particular, the sources extracted from plant biomass for the production of environmentally friendly motor fuel. GOST R 52808-2007 [2] refers to such diesel fuel mixed fuel - a binary mixture of mineral oil and vegetable oil. As the biological component of the blend fuels the department staff "tractors, cars, and combined heat and power" of Penza State Agricultural Academy explored lesser known vegetable oils, prepared by cold-pressed from the seeds of white mustard, camelina seed, colza, oilseed radish, soflora, soya, linseed. Due to differences of physical, chemical and performance properties (viscosity, density, flowability, lubricity, etc.) such biofuels from mineral diesel fuel (DF) required structural adaptation commercially available automotive vehicles, preferably without upgrading regular components and assemblies. Practical results obtained by adapting tractors class 14 kN [3, 4, 5, 6] by setting the factory system for the supply of diesel oil tank. Mixing mineral oil and vegetable oil, switch, fuel heater. The main disadvantage of these systems is their lack of control components that provide the desired composition DST depending on changes in load-speed mode of the diesel engine.
MATERIALS AND METHODS OF RESEARCH
Known dual-fuel diesel injection system [7, 8, 9], which allows the feeding of fuel through a common nozzle using a high pressure fuel pump (fuel pump) traditional performance. This fuel system to provide correction of the mixture in the feed.
Circuit supplying the combustion of biofuels in a diesel engine shown in Fig. 1. It includes 8 injectors (one per cylinder diesel engine), fuel pump 13 to supply to the nozzle of mineral diesel fuel from the tank 14, and the equipment for the storage type of alternative fuel supply. The latter, in its simplest form comprises cylinders 3 and 1 for bio-fuels and inert gas, the battery 4, fuel, the check valve 7.
The inert gas provides a predetermined pressure in the cylinder 3 and the battery, which is regulated gear 2 and the pressure gauge registers 5. An alternative fuel supply system supplies diesel fuel only a complete loss of biofuels mixer 6.
Image 1 - Flow diagram of alternative fuels Image 2 - The scheme of dual-fuel diesel injection
system
Image 3 - Dual-fuel diesel injection system with automatic regulation of mixed fuel
Known dual-fuel diesel injection system [10] containing mineral fuel tank 1 (Fig. 2), 2 tank of biofuel, fuel filters 3, 4, 5 fuel pump, electric pump 6, the fuel injection pump 7, 8 injectors, fuel lines 9 and a mixer 10 having one input and two output channels.
The purpose and objectives of the study: to analyze well-known models of dual-fuel diesel injection systems, to identify their shortcomings. To develop a new dual-fuel power system with automatic control of the DST.
RESULTS AND DISCUSSION
To ensure reliable operation of the tractor diesel dual fuel (diesel fuel and mineral DST) developed dual-fuel diesel injection system with automatic control of drop-in fuels, which provides the required percentage of mineral and biological components in a mixture, depending on the load and speed modes of diesel, and the fact thus improving the cardinality, fuel-economic and environmental performance of diesel engines under operating conditions [11].
Fig. 3 shows the dual-fuel diesel injection system with automatic regulation of mixed fuel, which contains mineral fuel tank 1, 2 fuel tank of the biological, mineral fuels fence line
3, which consists of a coarse filter 4, the line of the fence biofuel 5, consisting of coarse filter cleaning 6 and 7 of the electric control valve 8, 9 mixer biological and mineral fuels, which has two inputs 10 and 11 and one outlet channel 12, the supply line of diesel mixed fuel 13, consisting of a fuel feed pump 14, the fine filter 15, fuel injection pump pressure nozzles 16 and 17, while in lines 3 and 5, mineral intake and biological fuel to the inlet ports 10 and 11 of
the mixer 9 are mounted dispensers 18 and 19, kinematically connected to and controlled by control rods 20 and 21 with the diaphragm rod 22 of the actuator 23, the other end of the rod 22 is connected with the membrane 24, a loaded spring 25, the cavity 26 of the actuator 23 disposed therein with a spring 25 in communication with inlet manifold 27 diesel.
Works dual-fuel diesel injection system with automatic control of drop-in fuels as follows. The diesel engine and warm it is carried out on mineral fuels. This mineral fuel dispenser 18 is fully open and the biological fuel dispenser 19 is fully closed. Mineral fuel tank 1, having strainer 4, through the dispenser 18 enters the mixer 9 and further fuel pump 14 through the fine filter 15 is supplied to the high pressure fuel pump 16 and the injectors 17 is injected into the cylinders of diesel.
CONCLUSIONS
Changing the load-speed mode value changes diesel vacuum in the intake manifold 27 diesel engine that drives the diaphragm actuator 23, the rod 22 which, through kinematically associated control 20 and the adjustable rod 21 changes the position of dispensers 18 and 19, changing wherein the ratio of mineral and biological fuels entering the mixer 9. This achieves the automatic regulation of the drop-in diesel fuel directly into the process of the diesel engine.
After heating on a mineral diesel fuel include an electric pump 7 that supplies biological fuel tank 2 through the fuel filter 6, and the dispenser 19 to the mixer 9. Mineral fuels thus fed to the mixer 9 is similar to the mode of operation of the engine start and warm. The mixer 9 both fuels are mixed, and the resulting drop-in top Livo diesel fuel pump 14 is fed through a fine filter 15 in the high pressure fuel pump 16 and a further 17 jets injected into the cylinders of a diesel engine.
REFERENCES
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2. GOST R 52808-2007 Non-traditional technology. Energy biowaste. Terms and definitions. -M: Standartinform 2008. - 25.
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