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In the I C engine almost about 70% of the total energy is rejected to the coolant, exhaust gas, radiation and un-accounts in a conventional diesel engine. The low heat rejection concept is based on suppressing it and recovering the energy in the form of useful work. In this present Experimental study is carried out to improve the performance of the engine and improve the fuel economy resulting from...
An advanced 10000 TEU container ship is adapted as the main object of study in this paper. According to the law of energy conservation and thermodynamic principle, the mathematical models for major components of fuel oil viscosity control system (FOVCS) of marine diesel engine are established. For being insensitive to parameter variation or disturbance and the advantage of fast response, sliding mode...
Common-rail injection systems allow precise and flexible control of the fuel injection timings and injected fuel amount, resulting in improved fuel economy and reduced emissions. In this paper, an engine management system (EMS) is developed for a common-rail (CR) diesel engine. A common-rail test bench is used to facilitate the control development and calibration of the fuel injection system. The...
The paper based on the diesel CA6DL2–35E3 of FAW R&DC with turbocharger, intercooler, four-valve, six-cylinder and high pressure common rail, the diesel displacement is 8.6L. We had established model of the diesel with GT-power and simulated diesel engine working process under transient operating conditions which in constant speed while torque increased. We investigated and analyzed condition...
In order to make full use of the air in the chamber, improve the mixing process, reduce raw emission and fuel consumption of diesel engine, a novel combustion system, the Side Swirl Combustion System (SSCS), was proposed in the present paper. The effects of the distance between the flange and the nozzle (DBFN), a crucial parameter to the designing of SSCS, on the performance of the diesel with SSCS...
It is common to apply turbocharger technology on marine diesel engine, and the turbocharged strength is being improved. However, over 90% of schedule, the diesel engine runs at low load, bringing about problems such as inadequate torque, high fuel consumption, high heat load and etc. And directly impact operation of power and economy. The key point to improve low-load performance of marine turbocharged...
Based on YD4A75-C3 electronic-controlled common rail diesel engine, the characteristic of in-cylinder combustion was simulated. The research results showed that fuel vapor mainly is formed in the front of the jet spray, then the great part of fuel is diffused to the combustion chamber wall, concave and clearance by jet kinetic energy. In-cylinder peak temperature region all most appears in the outer...
Jatropha curcas is suitable for growing in the barren mountains. It has high productivity of seed oil. It is a good renewable energy sources. It is important for the practical application of Jatropha oil to study on the heat release rate of a diesel engine using Jatropha curcas oil as fuel. In a single-cylinder direct injection ZH1115 diesel engine fueled with Jatropha curcas oil, the cylinder pressure...
Diesel Particulate filter technique is widely recognized as the most effective ways in particulate matter (PM) emission control at present. Different technical routes are applied to filter and regenerate the particles for different types of diesel engines. Based on the analysis of the characteristics and development status of filter material and regeneration, this thesis studied the matching and integration...
Heat release analysis in diesel engines is a powerful method to investigate the combustion process and engine performance. The aim of this study is to simulate the heat release rate during combustion using the measured in-cylinder pressure based on thermodynamic principles. After determining the submodels such as mass and composition, gas and fuel properties, heat of combustion, heat loss to the walls,...
A concept of forced swirl combustion chamber in diesel engine is proposed in this paper. It can be used to enhance the intensity of swirl flow in the cylinder and accelerate the rate of air-fuel mixture process by designing the special structure in the combustion chamber. This new type of forced swirl combustion chamber includes double swirl combustion chamber that was discussed past and partial swirl...
Based on KIVA-3V code, the numerical simulation on the combustion process and NOx emission of a light-vehicle diesel engine is carried out, using different injection strategies. The results show that compared with the traditional single injection, pilot injection can decline the ignition delay period and the maximum combustion temperature, which leads to the reduction of the NOX emission, as pre-injection...
A concept of forced swirl combustion chamber in diesel engine is proposed in this paper. It can be used to enhance the intensity of swirl flow in the cylinder and accelerate the rate of air-fuel mixture process by designing the special structure in the combustion chamber. This new type of forced swirl combustion chamber includes double swirl combustion chamber that was discussed past and partial swirl...
In the present experimental work a computerized Single cylinder Diesel engine with data acquisition system was used to study the effects of oxygen enriched air intake on heat release rate. Increasing the oxygen content with the air leads to faster burn rates and the ability to burn more fuel at the same stoichiometry. Added oxygen in the combustion air offers more potential for burning diesel. Oxy-fuel...
In a normal diesel engine, about thirty percent of the total energy is rejected to the coolant. The low heat rejection concept is based on suppressing this heat rejection to the coolant and recovering the energy in the form of useful work. The purpose of this project is to increase the performance of the engine and improved the fuel economy resulting from coating those using partially stabilized zirconia...
The main objective of study is to control the emission from diesel engine and improve the performance by using the emulsified fuel. A single cylinder, water cooled, four stroke diesel engine was used for this study. Experiments were conducted in the first phase at different ratios of emulsions via (50%diesel + 50 ethanol), (60% diesel + 40% ethanol), (70% diesel + 30 % ethanol) as fuel. From the investigation...
Ethanol is a bio-based renewable and oxygenated fuel, thereby providing potential to reduce the PM emission in diesel engine and to provide reduction in life cycle of carbon dioxide. So that reduces ozone layer depletion. There are several studies which reports improvement in the engine performance and emission by using ethanol blend fuels. Many researches going on in the area of ethanol as alternate...
Electric power systems in many remote rural villages generally consist of diesel electric generators (DEGs) serving relatively low and highly cyclical loads the majority of the time. Methods of improving the efficiency and operational lifetime of these systems are to load the DEGs closer to their rated capacity, employ heat recovery and utilize turbochargers. The efficiency of the DEG engine is directly...
This paper describes the properties and application of a new composite oxygenated fuel, named as FHYJ, for an compression-ignition engine. First, the properties of FHYJ, and FHYJ-diesel fuel blend were studied. Furthermore, experimental tests were carried out to study the combustion performances and emissions of a four-cylinder direct injection diesel engine fuelled with the blends compared with those...
The use of thermodynamic models for the simulation of the cylinder process from analyzing heat release has been a common practice as a way to predict the performance of internal combustion engines. However, it is of importance to apply a suitable heat release model, as well as the gas properties, fuel properties, heat loss models, etc. In this paper, in order to distinguish two stages of combustion...
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