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Ideal injection rate has greater influence on improve diesel combustion process and its performance. In order to realize the ideal boot-type injection rate, the paper founds mathematics model for the diesel injection system electric controlled injector, The application of MATLAB/SIMULINK software had simulation study and be got desired the desired ideal boots-type fuel injection rate. Meanwhile, analysis...
To study the injection characteristics the double-solenoid valve system is designed in different conditions, and double solenoid valve test system and a test platform and built to complete the test content. Conditions on the regulation of the same target features, performance and low-speed jet loop dynamic adjustment of performance between the test result analysis. Results show that double solenoid...
The mean methods of improving performance of modern diesel engine include increasing speed, increasing cycle fuel injection quantity, increasing fuel injection pressure and intake boosting technology, so that more fuel quickly mixing with incylinder air in shorter time is requested. For solving these problems, the spray characteristics under the high injection pressure and high ambiance density must...
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...
The middle speed four stroke diesel engine has the advantages of small capacity, light in weight, capable to combustion poor fuel oil. In recent years, they have been used more comprehensive than before. Daihatsu 6PSHdM-26H diesel engine, which is a type of 4-stroke medium-speed turbocharged marine diesel engine, is widely used in ocean-going ships. Describes the failure or fuel injection system with...
In order to investigate the effects ethanol-diesel blends and altitude on the performance of diesel engine, the comparative experiments were carried out on the bench of turbo-charged diesel engine fueled with pure diesel (as prototype) and ethanol-diesel blends (E10, E15, E20 and E30) under different atmospheric pressures (81kPa, 90kPa and 100kPa). The experimental results indicate that the equivalent...
To improve the soot emissions performance of a common rail diesel engine, two combustion chambers with different diameter-depth ratio were designed under the conditions of the same compression ratio, and using CFD software to simulate the combustion process with different chamber shape and injection timing. The results showed that NOx emissions decreased with the delay of the injection timing, while...
The mean methods of improving performance of modern diesel engine include increasing speed, increasing cycle fuel injection quantity, increasing fuel injection pressure and intake boosting technology, so that more fuel quickly mixing with in cylinder air in shorter time is requested. For solving these problems, the spray characteristics under the high injection pressure and high ambiance density must...
Hardware-in-the-loop validation system of control strategies of common rail direct injection marine diesel engine was established, where control oriented cylinder-by-cylinder engine model (CCEM) was used. Simulation results show that CCEM is applicable to validate the control strategy of engine control system, and comparison between simulation results and test bench data approved the accuracy and...
This paper is about simulation design of an Electronic Control Unit (ECU) for an adaptive cruise control (ACC) and for an engine management system (EMS). The simulation model allows processing of various sensors data like engine speed, engine temperature, and distance from the front vehicle. By collecting data from various sensors, ECU controls the vehicle speed by using electronic fuel injector actuator...
In order to improve the plateau adaptability of CY4102BZLQ-A2A turbocharged diesel engine, the matching performances of the diesel engine with TB28 and HP60 turbochargers at different altitudes (0 m, 2,000 m, 3,000 m, 3,500 m, 4,000 m) were investigated on the engine test bed for simulating high altitude (1ow atmosphere pressure). Results show that HP 60 turbocharger is more suitable to match the...
The increasingly strict restrictions being place on diesel engine emissions have the interest in alternative combustion concept. The dual fuel engine exhibits much better emission characteristics than a diesel engine whilst having similar efficiency. The dual fuel engine is investigated for their potential to achieve near zero nitrogen oxide (NOx) and soot-particle emissions. In both SI and diesel...
In this paper, the engine optimal matching is done to improve the efficiency of a turbocharged lean-burn LPG engine by optimizing the compression ratio and the distribution phase of camshaft. In this way, the gas consumption and emissions of the LPG engine are reduced. A one-dimensional engine model and a three-dimensional in-cylinder combustion model are set up with simulation software. The optimal...
Pressure changes in the diesel injection system result in the growth and collapse of gas bubbles. In order to analyze the injection characteristic of fuel injection system under gas-liquid two-phase conditions, and predict the influence of bubble for injection characteristic, a mathematical model of gas bubble is studied based on the physical processes of gas bubble resolving and releasing. The model...
By mapping the pump and the injector of 16V265H diesel engine, it comes to the conclusion of the structural parameters of the fuel injection system for electronic control unit pump. GT-Fuel is used to establish and perform the simulation model of fuel injection system for 16V265H diesel engine. Compared with that of local locomotive fuel injection system, the performance curve of 16V265H diesel engine...
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...
Dimethyl ether (DME) is a promising and excellent alternative fuel for compression ignition DI diesel engines. In addition to the significant merit of no soot emission, DME would be of better ignition quality, lower auto ignition temperature and better atomization compared with diesel. The paper presents models and simulates fuel injection system of diesel/DME engine. Simulation calculation proven...
Augment Common-Rail Injection System (ACRS) could realize multilevel injection pressure and adjustable injection rate (square ramp shoot). So it could match operate state of diesel engine well, and has vast potential for reducing the emission of high-power diesel engine. The principle of Electric Control Pressure Amplifier (ECPA) of ACRS was analyzed. The simulation and the experimental investigation...
This paper presents a model which can be used to simulate the load acceptance behavior of a diesel generating set. Unlike traditional thermal plants, generating sets (gen-sets) are often expected to undergo large rapid changes in load. A gen-set with a low inertia will naturally be more susceptible to changes in speed. This problem is compounded with the introduction of turbocharged engines. Although...
A numerical simulation model for the sequential turbo charging (STC) diesel engine was established by STAR-CD and the initial boundary condition of the model was calculated by the GT-POWER. The experiment results were compared to multi-dimensional model results. Based on the model, the effects on the combustion process and the NOx emissions, including inject cone angle and inject timing were studied...
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