DIESEL MIXED FUEL: PROBLEMS AND INNOVATIVE INVENTIONS

2016 ◽  
Vol 1 (2) ◽  
pp. 46-51 ◽  
Author(s):  
Уханов ◽  
Denis Ukhanov ◽  
Уханов ◽  
Aleksandr Ukhanov ◽  
Адгамов ◽  
...  
Keyword(s):  
Vegetable Oil ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Supply System ◽  
Dual Fuel ◽  
Original Design ◽  
Mixed Fuel ◽  
Fuel Supply ◽  
Biodiesel Blend ◽  
Fuel Supply System

The goal of the research is constructive adaptation of automotive diesel engines working by diesel mixed fuel. A perspective kind of an alternative motor fuel is biodiesel blend produced with mixing of vegetable oil and conventional diesel fuel in different percentages. The present diesel-powered machinery is not adapted to work on such kind of fuel because of the different properties of biodiesel and diesel fuels. Applying of the invented devices (such as dual-fuel supply system, the mixer-filter and ultrasonic fuel mixer) allows to adapt automotive diesel engines for work on biodiesel blend. The dual-fuel supply system performs engine start, warm-up and stop modes on mineral diesel fuel, and its work on biodiesel blend on other modes. The original design of the fuel mixer-filter provides effective mixing of components and filtration from contaminants. Due to the high frequency vibrations the ultrasonic mixer provides the obtaining of homogeneous fuel composition and molecular splitting of higher fatty acids contained in vegetable oil.

scholarly journals MODERNIZATION OF THE DESIGN OF THE MIXING AND FUEL SUPPLY SYSTEM FOR TRACTOR DIESELS FOR BIOFUEL OPERATION

2020 ◽  
pp. 135-147
Author(s):  
Victor Anisimov ◽  
Vadym Ryaboshapka ◽  
Anatoliy Yelenych
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Combustion Process ◽  
Vortex Chamber ◽  
Supply System ◽  
High Quality ◽  
Fuel Supply ◽  
Short Period ◽  
Fuel Supply System

In diesel engines, the combustion process takes place over a very short period of time (0.001 s). As a result, complete and timely combustion of fuel and good use of the air available in the engine cylinders can be achieved only with very high-quality mixing. The use of biofuels in modern diesel engines causes a number of problems associated with changes in the parameters of fuel supply and mixing. All types of fuel have different characteristics: density, viscosity, lubricating properties, self-ignition temperature, compressibility and. in this regard, the laws of fuel supply: spraying, combustion, will be different. The viscosity of biofuels is higher than that of diesel fuel. For this reason, its capacity through small holes in the nozzle of the nozzle (dh= 0.25...0.40 mm) lower than diesel fuel. Due to the small diameter of the holes in the nozzle nozzles and the increased viscosity of biofuels, the nozzle holes are quickly coked. At the same time, the shape and direction of the jet initially changes, and then the hole is completely coked and the fuel supply stops. Thus, for high-quality operation of the diesel engine on biofuels, it is necessary to modernize the design of the mixing and fuel supply system. This problem can be solved by using systems with separate combustion chambers, i.e. using vortex chamber mixing. In the vortex chamber, 60-80% of the fuel burns, the pressure increases and the burning torches of the fuel flow at high speed into the main over-piston plane of the combustion chamber, where there is a significant supply of air that is not used during the combustion of the charge in this chamber. At the same time, oxygen from the air is well used, and the operation of the diesel engine becomes more efficient at relatively low values of the excess air coefficient at the nominal mode and less toxicity of exhaust gases than for single-chamber diesels.

scholarly journals The criteria of fuelling the dual-fuel SI engine with gasoline and methanol

2013 ◽  
Vol 153 (2) ◽  
pp. 12-19
Author(s):  
Zdzisław Stelmasiak ◽  
Janusz Semikow
Keyword(s):  
Methyl Alcohol ◽  
Spark Ignition ◽  
Supply System ◽  
Spark Ignition Engine ◽  
Dual Fuel ◽  
Stable Operation ◽  
Fuel Supply ◽  
Fuel Supply System ◽  
Pure Methanol ◽  
Valve Engine

In the paper are discussed test results of dual fuel spark ignition engine with multipoint injection of alcohol and gasoline in area of inlet valve. Engine fuelling was accomplished through a prototype fuel supply system comprising duplex injectors controlled electronically. Implemented system enables fuelling of the engine with pure gasoline, with pure methanol, or simultaneous combustion of the both fuels mixture with any fraction of the alcohol. The tests were performed on four cylinder, spark ignition engine of Fiat 1100 MPI type. In the paper are presented criteria to be fulfilled in dual fuel spark ignition engine run on gasoline and methyl alcohol. The criteria were developed on the base of engine testing performed on engine dynamometer. When developing the criteria, one took assumption of energetic equity of fuel doses in traditional and dual fuel supply system in every operational point of the engine. The second criterion consisted in maintaining a minimal elementary dose of gasoline and alcohol injectors, which would assure stable operation of the engine. In result of the performed analysis one proposed a map of possible ranges of dual fuel feeding of the engine with methyl alcohol and gasoline.

Development of a Mechanical CNG-Diesel Dual Fuel Supply System

1993 ◽  
Author(s):  
Dong Soo Jeong ◽  
Sung Woo Suh ◽  
Seung Mook Oh ◽  
Kyo Nam Choi
Keyword(s):  
Supply System ◽  
Dual Fuel ◽  
Fuel Supply ◽  
Fuel Supply System

scholarly journals Stage 3a environmental compliance of the 6-cylinder tractor engine

2021 ◽  
pp. 188
Author(s):  
Heorhi Kukharonak ◽  
Alexander Petruchenko ◽  
Andrei Predko ◽  
Dmitry Telyuk
Keyword(s):  
Combustion Chamber ◽  
Diesel Engines ◽  
Injection Pressure ◽  
Supply System ◽  
Exhaust Gas ◽  
Environmental Compliance ◽  
Fuel Supply ◽  
Fuel Supply System ◽  
The Cost ◽  
Gas Recirculation

The development strategy of the Minsk Motor Plant, implemented within the framework of plant and state scientific and technical programs, is aimed at producing competitive products that meet modern technical requirements of international standards and quality. The mandatory requirement for the successful promotion of diesel engines on the off-road vehicle market is to ensure the required environmental performance, with low fuel consumption and low engine cost. The well-known technical solutions aimed to achieve environmental indicators of the Stage 3A level significantly increase the cost of diesel engines, therefore, the achievement of the required environmental standards without a significant increase in the cost of engines can be considered an urgent task. Purpose. Stage3A Environmental Compliance for 6 Cylinder Tractor Diesel. Methodology. Experimental studies were carried out for diesel engines equipped with: a Common Rail BOSCH accumulator fuel supply system with an injection pressure of 140 MPa, injectors with 7 nozzle holes; a direct-action fuel supply system with a MOTORPAL fuel pump providing a maximum injection pressure of 100 MPa, MOTORPAL injectors and AZPI with five nozzle holes; combustion chambers of two types with bowl diameters of 55 and 67.5 mm; cylinder heads providing swirl ratios 3–4 and 3.5–4.5; high pressure exhaust gas recirculation system. The tests were carried out at characteristic points of the NRSC cycle at three crankshaft speeds: minimum idle speed 800 min-1, maximum torque 1600 min-1, and maximum power 2100 min-1. Results. It turned out that it is possible to achieve Stage3A emissions standards on 116 kW diesel engines using direct fuel equipment and a semi-open combustion chamber, on 156 kW diesel engines using a Low Cost Common Rail fuel supply system and an open combustion chamber. Originality. The results of the combustion chamber shape choice, the parameters of the fuel-injection equipment, the swirl ratio of the inlet channels, valve timings and parameters of the exhaust gas recirculation system made it possible to organize diesel engine workflow of the Stage 3A ecological level. Practical significance. Construction elements of the six-cylinder diesel engines have been developed and introduced at the Minsk Motor Plant.

Experimental Assessment of a Diesel-LPG Dual Fuel Supply System for Retrofit Application in City Busses

2012 ◽  
Author(s):  
Georgios Fontaras ◽  
Urbano Manfredi ◽  
Giorgio Martini ◽  
Panagiota Dilara ◽  
Giovanni Deregibus
Keyword(s):  
Supply System ◽  
Dual Fuel ◽  
Experimental Assessment ◽  
Fuel Supply ◽  
Fuel Supply System

INVESTIGATION OF OPERATIONAL RELIABILITY OF DIESEL ENGINE FUEL SUPPLY SYSTEMS

2021 ◽  
Vol 74 (3) ◽  
pp. 9-16
Author(s):  
YU.V. BAZHENOV ◽  
◽  
M.YU. BAZHENOV ◽  
V.P. KALENOV ◽  
◽  
...  
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Operational Reliability ◽  
Supply System ◽  
Engine Fuel ◽  
Fuel Supply ◽  
Fuel Supply System ◽  
Supply Systems

The results of the investigation of operational reliability of the fuel supply system of diesel engines F1A FIAT DUCATO cars, the main reasons for the system's loss of operability, the numeri-cal characteristics of its failure-free performance are given. On the basis of processing the array of experimental data on faults and failures in the system, the regularities of change of failure intensi-ty and probabilities of failure-free operation of its main parts depending on vehicle mileage are determined. Methods and algorithm of troubleshooting and timely elimination of damages occur-ring in the fuel supply system are proposed and tested at the FIAT PROFESSIONAL dealership in Vladimir. The introduction of the results of the performed investigations into the production pro-cesses of car service enterprises allows to significantly reduce the costs of maintaining the opera-ble state of the diesel engine fuel supply system in operation.

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