内燃机学报最新文献

{"title":"MATHEMATICAL MODELING OF THE ENGINE PARAMETERS INFLUENCE ON VEHICLE ACCELERATION DYNAMICS","authors":"О. Osetrov, B. Chuchumenko","doi":"10.20998/0419-8719.2021.2.01","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.2.01","url":null,"abstract":"The throttle response of a vehicle determines its dynamic properties and is characterized by an acceleration time from 0 to 100 km/h. An experimental study of the influence of vehicle parameters on its throttle response is associated with significant material and labor costs. At the stage of sketching the design of the vehicle, preliminary determination of design parameters and settings, it is rational to use mathematical models. In the existing models of the vehicles movement dynamics, the engine power, as a rule, is set by empirical dependencies and does not take into account the possibility of changing its parameters and characteristics. The paper proposes a mathematical model that combines models of the engine workflow and the dynamics of vehicle acceleration. The mathematical model of the engine workflow is a quasi-stationary thermodynamic model, in which combustion is described by the Vibe equation, and heat transfer with the walls is described by the Woschni equation. To check its adequacy, an experimental study of the VAZ-2108 engine was carried out to obtain external speed, load and control characteristics. Good agreement between the calculated and experimental data is shown. Vehicle acceleration simulation was carried out according to the method of E.A. Chudakov. The parameters of the VAZ-2108 car and the resistance forces during acceleration from 0 to 100 km / h have been determined. It is shown that the car accelerates from 0 to 100 km / h in 18.3 s, which corresponds to the experimental data and indicates the adequacy of the chosen techniques. The influence of changing the parameters and settings of the engine on the dynamics of vehicle acceleration has been investigated. It is shown that in order to achieve better dynamics of motion, the cylinder diameter and compression ratio must be maximized. The ignition timing, intake valve closing angle and excess air ratio have extremes. The efficiency of using a 16-valve cylinder head instead of an 8-valve one is shown. Based on the results of the studies, it was proposed to apply a set of engine parameters, which made it possible to reduce the acceleration time of the VAZ-2108 from 18.3 s to 13.2 s. Thus, the developed mathematical model makes it possible to quantitatively evaluate the influence of engine parameters on the dynamics of vehicle acceleration, to optimize the parameters and settings of the power plant and the vehicle as a whole.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83175207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STUDY OF THE EFFECT OF FEED PRESSURE AND NOZZLE CHANNEL CROSS-SECTIONS ON FUEL SUPPLY PROCESSES IN GAS-DIESEL LOW-SPEED TWO-STROKE LOW-PRESSURE ENGINES","authors":"A. Marchenko, A.P. Bilousov, V. Savchuk, V.S. Verbovsʹkyy, N.E. Rybalchenko","doi":"10.20998/0419-8719.2021.1.08","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.08","url":null,"abstract":"The use of gas fuels for marine two-stroke low-speed internal combustion engines is considered by the International Maritime Organization as the main tool for implementing the program adopted in 2018 to reduce greenhouse gas emissions by half by 2050 compared to 2008. In this regard, the world's leading manufacturers of this type of engines are actively engaged in research and development work aimed at developing, designing, manufacturing and putting them into operation. In this class of engines, there are a number of limitations that do not allow the existing experience of converting four-stroke marine engines to gas fuel to be applied to them. In this regard, each manufacturer develops its own approaches to solving this problem. As a result, two fundamentally different approaches were outlined - this is the supply of gas fuel directly to the working cylinder at the beginning and at the end of the compression stroke. Each of these methods has its own advantages and disadvantages. Earlier, the authors showed that in addition to the already implemented technical solutions, other approaches can be used related to the supply of gas fuel into the working cylinder under a pressure of 4.0...6.0 MPa, which allow combining the advantages of both methods implemented in practice and significantly reduce their inherent disadvantages. In particular, reducing the residence time of the gas-air mixture in the working cylinder of the engine during the compression stroke is an effective method of combating knocking combustion that occurs in low-pressure engines. In turn, this time depends on the pressure under which the gas fuel is supplied to the gas supply module and on the characteristics of its outflow through the flow path of this device. This article is devoted to the study of the influence of the design features of the flow path on the formation of the trajectories of gas fuel movement and the parameters of its outflow from the gas module to the working cylinder under conditions of changing back pressure.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83656639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PECULIARITIES OF DETERMINATION OF FUEL CONSUMPTION AND EMISSIONS OF HARMFUL SUBSTANCES OF ENGINES OF VEHICLES OPERATING ON GAS FUEL","authors":"I. Gritsuk, D. Pohorletskyi, D.S. Adrov, А.V. Bilai","doi":"10.20998/0419-8719.2021.1.04","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.04","url":null,"abstract":"The article considers the features of the method of research of fuel economy and environmental performance of vehicles with engines converted to run on gas fuel, which are equipped with a thermal training system based on a thermal accumulator phase transition, which is based on the implementation of system interaction of three interconnected components: information, analytical and energy. The schematic diagram of the system of thermal preparation and the information system of estimation of ways of maintenance of thermal preparation of vehicles in the conditions of operation by means of system of thermal preparation on the basis of an onboard complex (Intelligent transportation system) are presented. The peculiarity of the proposed system is that the subsystems create a common information field of the vehicle monitoring system with the heat treatment system, but operate separately from each other, based on the characteristics of the tasks they perform. Improved is the method for determining and calculating fuel consumption and emissions in exhaust gases of vehicles with engines converted to run on gas fuel, equipped with a thermal accumulator phase transition in the processes of pre-start and post-start heat treatment based on the selected model of the engine \"Neutralizer\". To ensure thermal preparation of vehicles with engines converted to run on gas fuel, equipped with a thermal training system based on a thermal accumulator of the phase transition, a cycle of thermal preparation in operating conditions has been developed. The influence of the thermal preparation system with the heat accumulator of the phase transition of a vehicle with an engine converted to run on gas fuel on the fuel efficiency indicators and environmental indicators in the pre-start and post-start-up processes is established.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90434714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SOME ASPECTS OF THE DEPAS D4.0H SYSTEM APPLICATION FOR INCREASING THE ENERGY EFFICIENCY OF INLAND NAVIGATION VESSELS","authors":"R. Varbanets, V. Zalozh, Т. Tarasenko, V. Kirnats, V. Klymenko, N. Alexandrovskaya","doi":"10.20998/0419-8719.2021.2.08","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.2.08","url":null,"abstract":"One of the most acute thematic areas in discussions at international forums at various levels are the issues of improving the environmental performance and increasing the energy efficiency of the merchant marine vessels, both in international maritime and inland navigation. This article discusses the results of the practical application of analytical methods for processing the indication data of internal combustion engines of the Danube pusher under operating conditions, as well as some aspects of the application of the results of analytical synchronization of the data obtained to further substantiate the optimal operating modes of such vessels. The results are applicable to determine the possible range of variation in energy efficiency and environmental friendliness. When determining the energy efficiency indices, various forms of pushed caravans, most often operating in the Danube shipping, are taken into account. Further steps have also been taken to substantiate the concept of prioritizing diagnostics and optimizing the operation of engines of existing ships in comparison with the implementation of innovative ships projects. Surely, the introduction of new projects will theoretically lead to a faster achievement of the goals of a number of European projects (for example, GRENDEL - Green and Efficient Danube Fleet, European Green Deal conception, etc.) to achieve zero emissions, but any innovative projects are much more expensive than any modernization and optimization of the movement modes of vessels that are already in the Danube fleet, and which are successfully operating with good economic results. In this context, innovative vessel projects are not attractive to shipowners and other participants in the Danube transport market. The need to attract additional investments, lack of funds, market decline in the context of pandemic restrictions, the actual loss of business positions of small shipowners - all these are factors that make it impossible for the widespread use of innovative developments and solutions for the complete renewal of the Danube fleet by shipowners.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74884592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COMPARISON OF COMBUSTION INDICATORS OF TWO-STROKE ENGINES WITH A CARBURETOR AND DIRECT FUEL INJECTION","authors":"V. Korohodskyi","doi":"10.20998/0419-8719.2021.1.05","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.05","url":null,"abstract":"The subject matter of study in the article is the indicators of the combustion process of a two-stroke engine 1D 8.7 / 8.2 with spark ignition when using a carburetor power supply system (external mixture formation) and a direct fuel injection system (internal mixture formation). Internal mixture formation ensures the organization of a stratified fuel-air charge (SFAC) and a stratified lean fuel-air charge (SLFAC). Combustion indicators allow you to assess the nature of the combustion process. The goal is to determine the nature of the change in the combustion indicators of the engine with external and internal mixture formation during the organization of the working process with the SFAC and SLFAC at the load characteristic modes (n = 3,000 rpm). The tasks to be solved are as follows. The use of internal mixture formation and the organization of the combustion of SLFAC and SFAC made it possible to obtain values of ηi greater than with external mixture formation at all modes of the load characteristic. The maximum value of ηi for SLFAC is 0.5 at a load bmep = 0.2 MPa, for SFAC – 0.44 at bmep = 0.25 MPa and 0.3 at bmep = 0.36 MPa for an engine with a carburettor. Maximum combustion pressure (рz), pressure increase ratio (λ), preliminary expansion ratio (ρ), further expansion ratio (δ), combustion character indicator (m), maximum heat release rate (dx / dfi max), duration of combustion from TDC to point Z (φz), total duration of combustion (dφz); to construct the characteristics of changes in combustion indicators and to obtain empirical dependences depending on the engine load. An experimental-analytical research method is used, which provides for the determination of the nature and analysis of the course of the combustion process according to the combustion indicators established by the experimental indicator diagrams. The following results were obtained. The use of internal mixture formation and the organization of the combustion of SFAC and SLFAC made it possible to obtain ηi values greater than with external mixture formation at all modes of the load characteristic. The maximum value of ηi for SLFAC is 0.5 at a load ре = 0.2 MPa, for SFAC - 0.44 at ре = 0.25 MPa and 0.3 at ре = 0.36 MPa for an engine with a carburetor. The pressure in the cylinder with the piston position at TDC is on average 1.5 times higher for an engine with a carburetor, and the maximum combustion pressure рz is higher up to 11 % with the organization of SLFAC (the degree of pressure increase λ is reduced by 26 %) and 20-22 % higher than in the organization of SFAC (the value of λ is reduced by 31 %). An increase in the compression ratio ε by 26.4 % and a decrease in the degree of preliminary expansion ρ at SLFAC in comparison with SFAC made it possible to increase the degree of further expansion δ by an average of 30 % and by 43 % in comparison with the carburetor power system. When organizing SLFAC, the value of the indicator of the nature of combustion m is, on average,","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"19 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87825267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SELECTION AND JUSTIFICATION OF THE MATHEMATICAL 6 FACTORS EXPERIMENT PLAN IN THE STUDY OF ICE STARTING QUALITIES","authors":"D.V. Levchenko","doi":"10.20998/0419-8719.2021.2.12","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.2.12","url":null,"abstract":"The practical significance of the application of multivariate regression analysis in engineering practice as a necessary step towards improving and optimizing complex systems and processes is presented. The goal and investigation tasks have been actualized to optimize the start-up process of a high-speed subcompact diesel engine. Preparation of the plural factors experiment features of diesel start-up process based on regression analysis and the theory of mathematical design of experiment are presented. Qualitative optimizing parameters of the diesel engine cold start are determined: instantaneous acceleration of the crankshaft dn / dτ at the time of crankshaft cranking by an external energy source close to the time spent on starting the engine with optimal parameters of the starting system and starting energy consumed during the crankshaft cranking by an external energy source. Six main factors influence on certain parameters of the diesel engine start quality have been investigated. The regression equation for assessing the quality of the start-up process is substantiated. The form of regression equation is a full quadratic polynomial for the reproduction of the investigated functions, based on the previous study of some used in the study individual factors influence. The analysis of proposals for rational plan selection of a six-factor experiment to find the coefficients of the second-degree regression polynomial is carried out. The substantiation of the decision regarding the choice of the plan is given. Selection was based on the requirements of the investigation test bench and the conditions for study organizing. Main impact had the predecessors experience of similar investigation and the statistical criteria for different plans of experiment comparison used in mathematical theory of design of experiments. The points of the plan have been defined on a multidimensional cube due to the need to vary on three levels with a uniform step of all 6 factors that were identified as influential. Under the conditions of the available laboratory test bench, the current values of the factors of equivalent cold start temperature, crankshaft-cranking speed and maximum temperature of the glow plugs have a variance of the installation at different points of the plan, and the nature of the factors on energy consumption is unknown in advance. As a rational experimental design for organizing the current study, the Box-Wilson orthogonal central compositional plan was chosen, built by adding plan points on the axes of the factorial space to the full-factorial plan of the lowest order, while maintaining the requirement of orthogonality and symmetry of the plan.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79880045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SIMULATION OF OPERATION OF THE AUTOMATED SYSTEM OF LOCAL MULTI-CIRCUIT COOLING OF PARTS OF AUTOTRACTOR DIESEL ENGINE","authors":"А.В. Триньов, D. Sivykh","doi":"10.20998/0419-8719.2021.1.09","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.09","url":null,"abstract":"The results present the intermediate stage of the study of the thermal state of individual heat-stressed parts and units of a forced tractor diesel engine in the conditions of their local air cooling (LAC), which is regulated in automatic mode. Possibilities of practical implementation on the basis of microprocessor control systems of multi-circuit local cooling of parts of valve exhaust unit, bearing unit of turbocharger, if necessary, additional air cooling of the upper part of cylinder blocks in the area of cylinder liners are considered and evaluated. The listed parts, as evidenced by the results of many engine tests, differing in the values of the maximum critical temperatures, which in turn depend on the course of heat exchange processes in the corresponding interfaces, nodes. At the same time, in the conditions of operation with the use of the LAC system on the diesel engine there are additional problems associated with the complication of the cooling control algorithm, the need to move to multi-circuit options with their critical temperature values and required cooling air costs. At this stage of the study, a test was performed in the test mode of the algorithm for supply control and shutdown of the coolant supply, the corresponding circuit solutions for its implementation. In the engineless experiment, previously specially designed and thermocoupled units were used, which were heated separately with the set test temperatures, as well as a series-produced unit, which is part of the 4th generation gas cylinder equipment (GCE) of modern engines. The unit consists of four sections with solenoid valves, which dose the gas supply to the injectors according to a given algorithm (Valtek type 30). At the input of the engineless experiment, this unit was used to turn on and off the supply of compressed cooling air in separate circuits (from 2 to 4). The moments of operation of the valves (opening-closing) corresponded to the set test temperatures. In addition to the dynamics of temperature changes at the control points of the research units during the cooling process, the pressure, temperature, and coolant flow rates on individual circuits were also monitored. The conducted engineless experiment confirmed the correctness of the adopted circuit solutions, and also proves the possibility of further application of serial GCE units in LAC systems.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86990404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CENTRIFUGAL COMPRESSOR PERFORMANCE MAPS TREATMENT FOR INTERNAL COMBUSTION ENGINES OPERATING CYCLE SIMULATION","authors":"D. Minchev, R. Varbanets","doi":"10.20998/0419-8719.2021.1.02","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.02","url":null,"abstract":"Simulation of the supercharged internal combustion engines operation cycle is impossible without correct estimation of the supercharger operating parameters. Standard approach is to use specially prepared performance maps of compressor and turbine of the turbocharger, which are based on the experimental (or manufacturer’s) raw data. Centrifugal compressor performance maps interpolation, extrapolation and treatment provides challenging requirements as it is important to get correct simulation under such special conditions as compressor choke, rotating stall and pumping surge. At the same time it’s important to obtain the fast and stable calculations of the engine’s operating cycle. Blitz-PRO – online internal combustion engines operating cycle simulation service – offers supercharger performance maps preprocessing and implementation. It provides three different modes of compressor surge consideration during calculations: 1) full-scale surge mode using Moore-Greitzer approach; 2) mild surge mode with flexible adjustment; 3) “stable” mode, when the surge is neglected and the compressor constant-speed lines are extended from the rotating stall point to the lower mass flow region with the hyperbolic equation. Using the MAN 8G70ME-E engine 12140 kW, 82 rpm operating point as an example, the calculation results are compared for three modes of compressor surge consideration. The “stable” mode provides the fastest and the most stable calculations, while the calculations under the full-scale surge mode could generate the numerical (nonphysical) instability of calculations, which are caused by the high sensitivity of the two-stroke engines to the gas exchange processes as it is shown. The mild surge mode provides fast and stable enough calculation with the surge consideration ability, which could be assumed as the best solution for the given example. The researcher should choose between provided three modes of the centrifugal compressor surge consideration according to the calculations tasks, preferring “stable” mode for initial model setup and mild surge mode for the surge probability check, while the accurate compressor surge simulation needs further development.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"316 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77578104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FEATURES OF CALCULATION OF ON-BOARD HEAT EXCHANGERS","authors":"U. L. Moshentsev, А. А. Gogorenko","doi":"10.20998/0419-8719.2021.1.07","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.1.07","url":null,"abstract":"Aspects of designing an onboard heat exchangers for the cooling system of the ship's power plant are considered. Such heat exchangers must be designed in accordance with the classical foundations of the theory and calculation of heat exchangers. At the same time, the key design points are considered by well-known sources in a separate setting related to the peculiarities of their consideration as specific elements of the theory. In this regard, they are not united by a single system necessary for their use in specific design problems. Accordingly, the paper highlights, concretizes and refines the parameters of the formulas used in the computational problem. In particular, the calculation of the heat transfer coefficient from the seawater side is performed according to the formula that gives the average value of the coefficient for the vessel. The heat transfer coefficients from the side of the coolant of the inner loop are calculated according to the well-known formulas recommended for calculating heat transfer in channels of any shape. Attention is drawn to the fact that heat transfer from the hold side goes to the finned wall. In this regard, the heat transfer coefficients determined by the indicated formulas should be considered convective. The transition to the given values of the heat transfer coefficients should be carried out considering the efficiency of the finned heat exchange surface, which considers the uneven temperature of various sections of the heat exchange surface. The calculation of heat transfer was carried out considering possible surface contamination. The procedure for performing the calculation steps is proposed, as a result of which the dimensions and heat engineering parameters of the heat exchanger can be determined. It was found that the use of the considered proposals leads to results close to those recommended by authoritative sources. The above proposals do not contradict the experience of creating and designing such structures. The recommendations can be used for educational and practical purposes by those who design heat exchangers of similar designs.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79209954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DETERMINATION OF COMPLEX FUEL-ECOLOGICAL CRITERION FOR DIESEL WORKING ON WATER-FUEL EMULSION","authors":"A. Marchenko, I. Parsadanov, A. Savchenko","doi":"10.20998/0419-8719.2021.2.04","DOIUrl":"https://doi.org/10.20998/0419-8719.2021.2.04","url":null,"abstract":"Today, internal combustion engines are very common as energy sources in many countries around the world. This makes the tasks related to improving the environmental performance of internal combustion engines relevant. The introduction of alternative fuels in internal combustion engines is an effective way to reduce their negative impact on the environment. One of the most available and widespread alternative fuels for diesels is a water-fuel emulsion. The use of water-fuel emulsion makes it possible to reduce the specific fuel consumption of petroleum origin, as well as to achieve a significant reduction in emissions of harmful substances from diesel exhaust. However, due to differences in the physical properties of traditional diesel fuel and water-fuel emulsion, the course of the processes of mixture formation and combustion in the diesel cylinder changes significantly. This may be due to the emergence of a reserve for further improvement of the diesel engine by selecting the parameters of the diesel engine running on water-fuel emulsion. The study selected the following parameters for variation: compression ratio, boost pressure, duration of the injection process, injection timing. The article considers the influence of these parameters on the Brake-specific fuel consumption of diesel, the specific emission of particulate matter and nitrogen oxides, the maximum pressure in the cylinder. The nature and degree of influence of changes in the parameters of the diesel engine on its performance was determined using mathematical modeling. It should be noted that the influence of each of the parameters selected for variation is quite complex and often ambiguous. That is, when some indicators improve, others may deteriorate somewhat. Therefore, in order to select the most rational parameters of a diesel engine running on a water-fuel emulsion, it is necessary to simultaneously assess the economic and environmental performance of the diesel engine. For this assessment, a method was used to determine a comprehensive fuel and environmental criterion for a diesel engine running on a water-fuel emulsion. Thus, the article shows the potential for comprehensive improvement of environmental and economic performance of the diesel engine by choosing rational parameters.","PeriodicalId":35991,"journal":{"name":"Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78695173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}