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The fear of fuel depletion necessities the integration of energy saving methodologies for electric power generation. Diesel engines are common for back-up/standby electric power generation units. Being compression-ignition based, in contrary to gasoline engines, the enrichment of the air intake of diesel engines with Hydrogen improves the fuel burning process, leading to better fuel consumption. Wet/dry...
Based on the self-developed high pressure common rail diesel engine electronic control unit (ECU) and the rail pressure control model, the setting values control strategies for the target pressure step response of the engine under dynamic conditions were studied. The change rate and gradient of the target rail pressure were limited to track changes and change trend of target rail pressure which was...
In this study, the modeling of the effect of exhaust gas recirculation on Homogenous Charge Compression Ignition (HCCI) in Diesel Engine has been investigated. The efficiency and emission reduction of the engine were an important point of view from study charge compression ignition. Furthermore, the greater adoption of the diesel engine has been inhibited by the increasing public awareness on pollution...
Ship diesel engine's structure is complex, and its fault has high coupling. For this reason, we study ship diesel engine fault diagnosis from two aspects. First of all, we divided ship diesel engine system into four parts according its basic structure and fault features, the fuel system, the lubrication system, the intake and exhaust system and the cooling system, and then analyzed the fault features...
In this paper, we propose an unknown input estimation based sliding mode control (UIESMC) approach for air path in the EGR-VGT diesel engine. This proposed UIESMC controller is adopted to track the intake and exhaust manifold pressures, and compressor mass flow rate when under unknown inputs, which include the un-modeled dynamics, modeled parametric uncertainties and the unknown faults. These unknown...
Research on Common Rail (CR) injection systems has helped to increase the performance of Diesel engines in terms of available power and fuel consumption in compliance with the restrictions of noise and pollutant emissions. To accomplish these tasks, the last generation of electro-injectors is being developed to advance and improve structure and operation in achieving an accurate fuel metering. This...
Modern self-propelled artilleries compose weapons parts and chassis parts. Its chassis is walking part of self-propelled artilleries and the chassis engine is the heart of the walking part. Technical state of the engine directly influences the condition of artillery technology. Thus, the research on fault diagnosis of the chassis engine of artilleries is very important. Fault diagnosis of the engine...
Turbocharger matching is a rather difficult task during design of highly rated diesel engines, especially for marine application. The sequential turbocharging (STC) technique is used to improve the performance of highly rated diesel engines in particular at part loads, the paper introduces the working principle of the sequential turbocharging system. To improve the performance of the TBD234V12 diesel...
With the strict implementation of the emissions regulations, the electronic control of diesel fuel injection system is the development trend for diesel engine in the future. Diesel Electronic Unit Pump (EUP) enjoys the advantages of digital control of fuel charge and injection pulse width and also reliability in operation, thus has a strong value in the field of high-power diesel engine. In this paper,...
This paper investigates the piston motion control strategies of a single piston hydraulic free-piston diesel engine, which is intended to be a power supply for hydraulic propulsion systems. The Cycle fuel mass is determined by engine displacement and load. A closed loop control method is used in fuel injection timing control strategy to make the position of bottom dead center steady possibly. In each...
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...
Swirl is an important flow pattern of air motion, it not only affects the fuel-air mixing and combustion processes in diesel engine, but also has a significant impact on heat transfer, combustion quality, and engine-raw emissions. For generating swirl efficiently, many researches have been performed, however, almost the methods have more or less crucial disadvantages. For overcoming these shortcomings...
Considering the drawbacks of regular maintenance, online state inspection based on vibration analysis is adopted to diagnose the locomotive working state, which can dramatically improve the maintaining efficiency as well as decrease the phenomena of over maintenance or lack of maintenance. Cylinder vibration general curve is acquired. Fault diagnosis method is researched by analyzing the curve and...
Swirl is an important flow pattern of air motion, it not only affects the fuel-air mixing and combustion processes in diesel engine, but also has a significant impact on heat transfer, combustion quality, and engine-raw emissions. For generating swirl efficiently, many researches have been performed, however, almost the methods have more or less crucial disadvantages. For overcoming these shortcomings...
Electronic unit pump (EUP) fuel injection system has prospective application in medium or heavy diesel engine. Developing an ECU of EUP diesel engine is necessary to meet emission regulations and economic requirements. The structure and working principle of EUP fuel injection system was studied. An ECU was developed, which consists of digital circuit, power supply module, driving circuit and sensor...
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...
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...
Diesel engines are one of the most application agricultural machines. Because of their applications in water pump and generator the user does not need to attend, their protecting is very important and it is one of the agricultural worries especially in remote areas. In this paper the effect of water radiator and fan belt relation of diesel engine temperature with is studied. In the normal condition...
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