scholarly journals Optimum design of nozzles’ tribology systems of a diesel engine fuel injector with high values of rail pressure

2015 ◽  
Author(s):  
V. Lazarev ◽  
G. Lomakin ◽  
E. Lazarev ◽  
A. Mylnikov ◽  
G. Wachtmeister
Keyword(s):  
Diesel Engine ◽  
Optimum Design ◽  
Engine Fuel ◽  
Fuel Injector ◽  
Rail Pressure

scholarly journals Deposition Formation Effect of Biodiesel in a Diesel Engine Fuel Injector

2021 ◽  
Vol 9 (8) ◽  
pp. 1057-1060
Keyword(s):  
Diesel Engine ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Research Work ◽  
Energy Resource ◽  
Petroleum Products ◽  
Energy Resources ◽  
Engine Fuel ◽  
Fuel Injector

To establish a long-term sustainability of biodiesel to fulfill the quest for renewable fuel resources for the countries has low or no fossil fuels reserves. The energy resource meets to its limited capacity, alternative new energy resources must be explored such as the introduction of biodiesel as an alternative energy resources of petroleum products. The present research work is a 90-hour long-term endurance test performed with B30 sample (biodiesel 30% + 70% diesel) fueled with modified investigation performance, sound pressure level and engine durability. Special attention has been given to certain phenomena affecting the life of the engine, the formation of deposits and its performance. Experimental results of this research work demonstrated that the modified diesel engine could be efficiently performed with the B30 fuel sample.

scholarly journals Diagnostic Model of Fuel Installation of Marine Diesel Engine

2017 ◽  
Vol 6 (2) ◽  
pp. 93-108
Author(s):  
Andrzej Grządziela ◽  
Agata Załęska-Fornal ◽  
Marcin Kluczyk
Keyword(s):  
Diesel Engine ◽  
Technical Condition ◽  
Diagnostic Model ◽  
Marine Diesel Engine ◽  
Engine Fuel ◽  
Fuel Injector ◽  
Engine Vibration ◽  
Marine Diesel ◽  
Internal Forces ◽  
Simulation Errors

The paper presents the results of simulation of marine diesel engine fuel injector malfunction and its effects on engine vibration. The work includes the analysis of the engine internal forces and their mathematical models. Simplifications are proposed to allow analyzing the system in one degree of freedom. The results of vibration simulations for the model with efficient fuel system and improperly adjusted injector are also presented. The comparison of simulation results with vibration measurements on the engine was also performed, the diagnostic model was identified and simulation errors were calculated. The complexity of other internal and external interactions is the subject of other studies by the authors. The paper analyzes only the effects of energy dissipation - vibration as a symptom of changes in the technical condition.

scholarly journals Numerical Simulation Research on Cavitation Flow of Different Fuels in Diesel Engine Injectors

2021 ◽  
Vol 7 (1) ◽  
pp. 254-261
Author(s):  
J. Shan ◽  
J. Li ◽  
Z. Guo ◽  
W. Yang
Keyword(s):  
Diesel Engine ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Fuel Injection ◽  
Pollutant Emission ◽  
Engine Fuel ◽  
Fuel Injector ◽  
Cavitation Flow ◽  
Simulation Research

With the increasingly stringent requirements of diesel engine fuel consumption and pollutant emission, higher requirements are put forward for the performance of diesel engine fuel injection systems. Cavitation flow in diesel fuel injectors is an extremely important factor affecting spray characteristics. In this study, the occurrence of cavitation in the fuel injector nozzle and its impact on mass flow rate and vapor fraction at the outlet of the fuel injection hole are studied numerically for various fuels such as diesel, gasoline, ethanol and methanol. The results show that the mass flow rate of diesel is the highest and that of gasoline is the lowest. Methanol and gasoline have the highest vapor content, followed by ethanol, and then diesel with the lowest vapor phase. For mass flow, the mass flow is inversely proportional to the viscosity of the fuel, and for cavitation, the amount cavitation is inversely related to the viscosity of the fuel. This agrees with many researchers’ findings.

Injection control strategy of diesel engine based on speed segment PID and operating parameter adaptation

2021 ◽  
pp. 1-18
Author(s):  
Guojin Chen ◽  
Jiawen Wang ◽  
Chang Chen ◽  
Yiming Yuan ◽  
Long Xu
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Operating Parameter ◽  
Common Rail ◽  
Injection System ◽  
Injection Timing ◽  
Engine Fuel ◽  
Rail Pressure ◽  
Injection Quantity ◽  
Injection Control

Aiming at the problems of low precision, poor anti-interference and poor follow-up in the control parameters for the diesel engine fuel injection system, this paper studies the control method of the high-pressure common rail electronic control fuel injection system of the diesel engine, constructs the high-pressure common rail fuel injection control system based on the ECU, and establishes the speed segment PID control model of fuel injection quantity, common rail pressure, fuel injection timing and fuel injection rate by using MATLAB/Simulink. The fuel injection quantity and timing are simulated. In order to realize all-round and flexible control of the diesel engine under different working conditions, and to achieve the desired optimal performance in all aspects, the optimization control method of the injection law for the diesel engine is studied. The diesel engine fuel injection control strategy based on speed segment PID and operating parameter adaptation is proposed to realize precise control of the common rail pressure, injection quantity, injection timing and injection rate under different working conditions. The simulation calculation and bench test show that the maximum fluctuation of rail pressure at idle speed is only 5 MPa, and the time to reach stability is only 1.25 s, which greatly improves the control accuracy, anti-interference and follow-up ability of the injection parameters.

scholarly journals Implementation of Common Rail Direct Injection System and Optimization of Fuel Injector Parameters in an Experimental Single-Cylinder Diesel Engine

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1122
Author(s):  
Yew Heng Teoh ◽  
Heoy Geok How ◽  
Ching Guan Peh ◽  
Thanh Danh Le ◽  
Huu Tho Nguyen
Keyword(s):  
Diesel Engine ◽  
Duty Cycle ◽  
Direct Injection ◽  
Common Rail ◽  
Injection System ◽  
Injection Timing ◽  
Multiple Injection ◽  
Fuel Injector ◽  
Rail Pressure ◽  
Open Time

The diesel engine is one of the solutions to slow down fossil fuel depletion due to its high efficiency. However, its high pollutant emission limits its usage in many fields. To improve its efficiency and emissions, a conventional mechanical fuel injection system (MFI) was be replaced with common rail direct injection (CRDI) system for the purpose of this study. In this way, injection parameters such as injection timing, injection pressure and multiple injection schemes can be tuned to enhance the engine performance. The rail pressure and engine speed response of the modified diesel engine was tested. It was found that by advancing the start of injection timing (SOI) timing or increasing the rail pressure, the brake torque generated can be increased. Multiple injection schemes can be implemented to reduce the peak heat release rate (HRR). Post injection was observed to increase the late combustion HRR. The maximum pressure rise rate (PRR) can be reduced by applying pilot injection. Further research was conducted on optimizing fuel injector parameters to improve the indicated mean effective pressure (IMEP) consistency and reduce injector power consumption. The consistency of IMEP was indicated by coefficient of variation (CoV) of IMEP. The injector parameters included open time, low time and duty cycle of injector signals. These parameters were optimized by carrying out response surface methodology. The optimized parameters were observed to be 230 µs for open time, 53µs for low time and 27.5% for duty cycle. The percentage of error of CoV of IMEP and injector power were found to be lower than 5% when the predicted results are compared with experimental results.

Numerical Simulation of the Effects of the Nozzle Parameters on In-Cylinder Fuel and Air Mixing Process

2013 ◽  
Vol 401-403 ◽  
pp. 218-221
Author(s):  
Qi Liu ◽  
Guang Yao Ouyang ◽  
Shi Jie An ◽  
Yu Peng Sun
Keyword(s):  
Numerical Simulation ◽  
Diesel Engine ◽  
Fuel Injection ◽  
Combustion Model ◽  
Engine Fuel ◽  
Three Dimension ◽  
Mixing Process ◽  
Fuel Injector ◽  
Injection Process ◽  
Air Mixing

In order to study the injection property of diesel engine fuel injector, the three-dimension combustion model of TBD620 diesel engine is constructed on the AVL Fire software platform. A numerical simulation of the two injectors’ fuel injection process at different load conditions has been done. The influence on fuel and air mixing process is analyzed. The results show that the special injector has a good performance at low load, but the standard injector is more favorable for fuel and air fully mixing at high load.

Numerical Analysis of Aluminium Oxide Nano Particles with Biodiesel in a Diesel Engine Fitted with Hemispherical Groove in the Piston

2021 ◽  
pp. 3691-3700
Keyword(s):  
Diesel Engine ◽  
Numerical Analysis ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Nano Particles ◽  
Fuel Injector ◽  
Biodiesel Blends ◽  
Closed Position ◽  
Combustion Features ◽  
Engine Valves

For proper combustion, bowl in the piston geometry plays a crutial role when the engine valves are in closed position. In the present work, the combustion geometry is of hemi-spherical groove in the upper region of the piston.simulations weres conducted for different blends( b20+al40, b20+al80) to analyze the combustion features in a four stroke diesel engine using ansys r18.1 software considering above geometry of the piston. . Pertaining to greater amount of density, viscosity of biodiesel blends, variations for b20+al80 render more performance than the biodiesel. Turbulent kinetic energy of both the fuels follow similar trend due to proper mixing of air with the fuel from fuel injector.

Production of Diesel Engine Fuel using Municipal Solid Waste

2021 ◽  
Vol 12 (1) ◽  
pp. 36-43
Author(s):  
Mohd Mujtaba Ahmed ◽  
Harveer Singh Pali ◽  
Mohammed Mohsin Khan
Keyword(s):  
Diesel Engine ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Engine Fuel

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

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