A study on the use of pure palm oil (biodiesel-DO) as an alternative fuel on the fuel supply system of marine diesel engines

Alternative fuel within the meaning of Directive 2014/94/EU is, among others, LPG (liquefied petroleum gas), characterized by a lower purchase cost and lower emissions of toxic exhaust compounds in comparison to the combustion of classic gasoline. In wood chippers, intended for chopping branches, with low-power internal combustion engines that meet the emission standards in force in 2019 in the European Union, in accordance with Regulation 2016/1628/EU, carburetor fuel supply systems are commonly used. Innovative trends in the development of these drives are: electronic fuel injection, systems supporting the adaptation of the working elements to the conditions of use and the use of alternative fuels. The first two solutions significantly affect the cost of purchasing a power unit or modernizing it. The authors of this article indicate, as a beneficial alternative, a cheap (EUR 105) possibility of modernizing the carburetor fuel supply system. It is based on a modification that will allow for the use of LPG instead of gasoline to drive the working system of the wood chipper. This article presents the results of tests on the fuel consumption of a wood chipper powered with gasoline (3.04 L h−1) and LPG (3.65 L h−1) during continuous chipping. The cost of an hour of chipping related to fuel consumption was determined, which was equal to 3.89 € h−1 while using gasoline, and 2.19 € h−1 when using LPG. The mass flow rate (0.66 t h−1) and volumetric flow rate (3.5 m3 h−1) of a wood chipper powered by a low-power (9.5 kW) internal combustion engine with spark ignition were determined. In addition, we determined the cost of producing 1 m3 of biomass from chipping freshly cut oak branches (Quercus robur L. Sp. Pl. 996 1753) with a maximum diameter of 80 mm and a humidity of 25%. The branches were selected earlier in such a way that their dimensions as as similar as possible. This amounted to EUR 1.11 for a gasoline-powered drive and EUR 0.63 for a LPG powered one. The benefits of using an alternative fuel supply system, the installation of which increases the cost of the machine by 8.4%, have been confirmed.

Download Full-text

DIESEL MIXED FUEL: PROBLEMS AND INNOVATIVE INVENTIONS

Bulletin Samara State Agricultural Academy ◽

10.12737/18698 ◽

2016 ◽

Vol 1 (2) ◽

pp. 46-51 ◽

Cited By ~ 1

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.

Download Full-text

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

Bulletin of Kharkov National Automobile and Highway University ◽

10.30977/bul.2219-5548.2021.94.0.188 ◽

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.

Download Full-text

INVESTIGATION OF OPERATIONAL RELIABILITY OF DIESEL ENGINE FUEL SUPPLY SYSTEMS

World of transport and technological machines ◽

10.33979/2073-7432-2021-74-3-9-16 ◽

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.

Download Full-text

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

ENGINEERING, ENERGY, TRANSPORT AIC ◽

10.37128/2520-6168-2020-4-16 ◽

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.

Download Full-text

INFLUENCE OF THE METERING METHOD ON THE CHARACTERISTICS OF A DIESEL DISTRIBUTOR FUEL PUMP

Herald of Dagestan State Technical University Technical Sciences ◽

10.21822/2073-6185-2018-45-2-52-61 ◽

2018 ◽

Vol 45 (2) ◽

pp. 52-61

Author(s):

К. M. Godzhaev

Keyword(s):

Differential Equations ◽

Diesel Engines ◽

Fuel Injection ◽

Injection Pressure ◽

Supply System ◽

Two Phase ◽

Fuel Pump ◽

Fuel Supply ◽

Injection Process ◽

Fuel Supply System

Objectives The aim of the study is to improve the performance of the metering system and thus enhance control over the cyclical supply of fuel to a diesel distributor pump. The results of a study of the effect of a new metering method on the characteristics of a distributor fuel pump are presented. Methods Following mathematical analysis, a mathematical model of the working process of the fuel supply system, based on a new metering approach employing the "decay of discontinuity" method, was compiled.The model comprises a system of differential equations for continuity and momentum alongside mass balance equations for describing the boundary conditions for various cavities of the fuel system, i.e. above the plunger, under the valve, above the valve cavities and in the nozzle. The differential equations take into account the two-phase nature of the gas-liquid medium in the injection cavities and metering system, as well as the design features of the pump. An expression for the stroke of the metering plunger in the new system is given. Results The theoretical and experimental characteristics of a fuel supply system employing the proposed metering system are considered. Diagrams showing maximum injection pressures, which depend on the stroke of the metering plunger at various strokes of the injection plunger and alteration of maximum injection pressure of the nozzle depending on the rotation speed of the cam shaft, are provided. The characteristics of the fuel supply system of the pump for various spring stiffness of the metering plunger are also provided in diagram form. The comparative parameters of the fuel supply process are presented for the conventional and new metering methods. The features of the use of diesel high-pressure distributor pumps, their design and operational features are described. The advantages of the metering system proposed by the author are presented in terms of its influence on the fuel injection process. A comparative evaluation of metering methods used in contemporary distributor pumps for diesel engines is given. Conclusion The results of the experiments confirmed the suitability of the new metering method for use in diesel engines.

Download Full-text

RESEARCH AND CALCULATION OF THE BIOGAS FUEL SUPPLY SYSTEM FOR A SMALL MARINE DIESEL ENGINE

Journal of Mechanical Engineering Research and Developments ◽

10.26480/jmerd.01.2019.64.70 ◽

2019 ◽

Vol 42 (1) ◽

pp. 64-70 ◽

Cited By ~ 1

Author(s):

Van Hai Nguyen ◽

Duc Thiep Cao ◽

Thi Hien Do

Keyword(s):

Diesel Engine ◽

Supply System ◽

Marine Diesel Engine ◽

Fuel Supply ◽

Marine Diesel ◽

Fuel Supply System

Download Full-text

Effective indicators of a hydrogen engine operating on a lean mixture and equipped with a modified fuel supply system

Trudy NAMI ◽

10.51187/0135-3152-2021-3-58-66 ◽

2021 ◽

pp. 58-66

Author(s):

R. Z. Kavtaradze ◽

B. Sun ◽

A. S. Golosov ◽

Zh. Chen ◽

Ts. Chzhan ◽

...

Keyword(s):

Power Control ◽

Alternative Fuels ◽

Internal Combustion Engines ◽

Internal Combustion ◽

Supply System ◽

Practical Significance ◽

High Quality ◽

Lean Mixture ◽

Fuel Supply ◽

Fuel Supply System

Introduction (problem statement and relevance). Limited oil reserves and tightening environmental standards are forcing engine manufacturers to switch to alternative fuels in the near future, among which hydrogen is the most promising. The advantages of hydrogen are high specific heat of combustion and high combustion rate. Wide concentration limits of hydrogen combustion make it possible to use high-quality power control, thereby providing an increase in the efficiency of a hydrogen engine when compared to the basic internal combustion engine.The purpose of the study was to ensure the operation of a serial gasoline engine running on hydrogen with a new experimental fuel supply system, as well as the modification of the intake manifold design without abnormal phenomena during combustion when operating on a lean mixture, and to obtain efficient and ecological characteristics of a hydrogen engine under bench test conditions, as a result.Methodology and research methods. The work is experimental, the reliability of the results obtained is confirmed by the use of modern means for measuring and processing experimental data. The obtained results of measuring nitrogen oxides are adequate to the known Zel'dovich thermal mechanism. The value of the results lies in the fact that they show the feasibility of transferring serial internal combustion engines to hydrogen; in addition, these results are used to develop and verify mathematical 3D models of the hydrogen engine working process.Scientific novelty and results. A new system providing the necessary characteristics (pressure, duration and cycle dose) for supplying hydrogen to the intake system with two injectors for each cylinder was designed, installed and tested on the prototype engine.Practical significance. The expediency of the working cycle creation and efficiency of a hydrogen engine with an experimental lean-burn fuel supply system was confirmed, which made it possible to provide high-quality power control with external mixture formation and forced ignition.

Download Full-text