The Search on Ethanol Fuelling for Compression Ignition Engine

2011 ◽  
Vol 127 ◽  
pp. 224-227
Author(s):  
Tao He ◽  
Qiu Fang Zhao ◽  
Ji Song Zang
Keyword(s):  
Development Strategy ◽  
High Speed ◽  
Rapid Development ◽  
Dynamic Performance ◽  
Atmospheric Environment ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Car Market ◽  
Oil Resources ◽  
External Dependence

Along with the rapid economic development in China, productions and sales of automobiles are growing at a high speed .The rapid development of the car market and the large increase of auto possession brought a huge demand of oil resources .The high external dependence has affected our country's energy security. The application of diesel blended the ethanol can ease the oil shortage, reduces atmospheric environment pollution and helps to realize sustainable development strategy of our country. This paper mainly conducts the research on diesel engine with ethanol fuelling, experimentally studied and analyzed the influence of ethanol blended diesel on the dynamic performance, economy performance and emission performance. The results show that Ethanol blended diesel can partially substitute diesel and effectively reduce the harmful pollutants while keeping the same power and economy.

Dynamic Performance of High-Speed Electric Multiple Unit within Multi-Body System Simulation

2019 ◽  
Vol 12 (4) ◽  
pp. 339-349
Author(s):  
Junguo Wang ◽  
Daoping Gong ◽  
Rui Sun ◽  
Yongxiang Zhao
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Dynamic Performance ◽  
Body System ◽  
High Speed Railway ◽  
Evaluation Indexes ◽  
Actual Operation ◽  
Multiple Unit ◽  
The Stability ◽  
Multi Body

Background: With the rapid development of the high-speed railway, the dynamic performance such as running stability and safety of the high-speed train is increasingly important. This paper focuses on the dynamic performance of high-speed Electric Multiple Unit (EMU), especially the dynamic characteristics of the bogie frame and car body. Various patents have been discussed in this article. Objective: To develop the Multi-Body System (MBS) model of EMU, verify whether the dynamic performance meets the actual operation requirements, and provide some useful information for dynamics and structural design of the proposed EMU. Methods: According to the technical characteristics of a typical EMU, a MBS model is established via SIMPACK, and the measured data of China high-speed railway is taken as the excitation of track random irregularity. To test the dynamic performance of the EMU, including the stability and safety, some evaluation indexes such as wheel-axle lateral forces, wheel-axle lateral vertical forces, derailment coefficients and wheel unloading rates are also calculated and analyzed in detail. Results: The MBS model of EMU has better dynamic performance especially curving performance, and some evaluation indexes of the stability and safety have also reached China’s high-speed railway standards. Conclusion: The effectiveness of the proposed MBS model is verified, and the dynamic performance of the MBS model can meet the design requirements of high-speed EMU.

Effect of Wheel-Rail Contact Geometry Relationship on Vehicle Dynamic Performance

2013 ◽  
Vol 712-715 ◽  
pp. 1541-1544
Author(s):  
Yi Jia Wang ◽  
Jing Zeng
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Dynamic Performance ◽  
Vehicle Dynamic ◽  
Safe Operation ◽  
Rail Wear ◽  
Variation Characteristics ◽  
Wheel Profile ◽  
Wheel Profile Wear ◽  
High Speed Vehicle

With the rapid development of high-speed railways, wheel and rail wear has become increasingly serious due to the acute wheel-rail interaction. During the operation of high speed vehicle, complicated wheel-rail contact force will lead to wheel profile wear, which will worsen the dynamic performance of vehicle system, or even influence the safe operation of vehicles. In order to ensure the vehicle dynamic performance, right now regularly wheel re-profiling has to be adopted. Therefore, the study of wheel profile wear and its effect on vehicle dynamic performance is very important [1,. The purpose of the paper is to study the variation characteristics of vehicle dynamic performance with respect to the wheel profile wear through numerical simulation and field test.

Influence of Nano Fuel Additives to Control Environmental Pollution from Naturally Aspirated Di-Ci Engine

2019 ◽  
Vol 1 (2) ◽  
pp. 45-54
Author(s):  
Prakash R ◽  
Murugesan A ◽  
Kumaravel A
Keyword(s):  
Environmental Pollution ◽  
High Speed ◽  
Direct Injection ◽  
Sol Gel ◽  
Volume Ratio ◽  
Mixing Rate ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Catalytic Material ◽  
Ci Engine

Diesel fuel is necessary for farming, transport, and industrialized sector. It contributes to the wealth of the universal economy while it is widely used due to having higher flexibility, combustion efficiency, consistency and handling facilities. However, emissions from fossil fuel are considered as the main source of environmental pollution. Thus, it becomes necessary to reduce emission by improving the performance of the engines. Recently the addition of catalytic material like nanoparticles to diesel proves to be a hopeful solution to reduce emission without much modification of the existing engine design. In the present study, the influence of nanoparticles doped with diesel on the performance and emission characteristics are carried out in a naturally aspirated, single-cylinder, four-stroke, water-cooled, 3.7 kW, direct-injection compression-ignition engine is coupled with eddy current dynamometer and high-speed data acquisition system. Cerium Oxide nanoparticles are selected as the best oxygen boosting catalytic nanoparticle and it is prepared by the sol-gel process.  Nanoparticles, then doped with diesel with the help of an Ultrasonicator with different molar concentrations (5 ppm, 7.5 ppm, 10 ppm, 15 ppm). Fuel properties of nano doped fuel samples are tested and presented in this paper. The DI CI engine experimental results were found to be brake thermal efficiency is increased by 3.6% by simultaneously reducing fuel consumption by 3.63% and also harmful environmental pollution like carbon monoxide, unburned hydrocarbon, carbon dioxide, and smoke level are decreased by 9.11%, 6.3%, 3.12%, and 12.6% respectively compared to pure diesel. It may be due to the enhanced surface to volume ratio, catalytic activity and improving the mixing rate of fuel and air in the combustion chamber.

Highway Passenger Transport Development Strategy with the Competition of High-Speed Railway

2011 ◽  
Vol 94-96 ◽  
pp. 527-530
Author(s):  
Si Tao Hu ◽  
Xue Mei Wang
Keyword(s):  
Development Strategy ◽  
High Speed ◽  
Choice Behavior ◽  
Rapid Development ◽  
Technical Support ◽  
Passenger Transport ◽  
High Speed Railway ◽  
Travel Choice ◽  
Support Resource ◽  
The Impact

With the rapid development of high-speed passenger railway and inter-city railway, highway passenger transport is facing an unprecedented competition and pressure. The impact of high-speed railway on highway passenger transport has been analysis and the transport characteristics of high-speed railway are compared with the highways’. On the basis of the travel choice behavior of passengers analysis, the systematized countermeasures of highway passenger transport are put forward including precise orientation, strengthen marketing enhancement, technical support, resource integration, brand service and government help.

scholarly journals Experimental Analysis of Engine Performance and Exhaust Pollutant on a Single-Cylinder Diesel Engine Operated Using Moringa Oleifera Biodiesel

2021 ◽  
Vol 11 (15) ◽  
pp. 7071
Author(s):  
Manzoore Elahi M. Soudagar ◽  
Haris Mehmood Khan ◽  
T. M. Yunus Khan ◽  
Luqman Razzaq ◽  
Tahir Asif ◽  
...  
Keyword(s):  
High Speed ◽  
Moringa Oleifera ◽  
Engine Performance ◽  
Operating Conditions ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
High Speed Diesel ◽  
Moringa Oleifera Oil ◽  
Smoke Opacity

In this investigation, biodiesel was produced from Moringa oleifera oil through a transesterification process at operating conditions including a reaction temperature of 60 °C, catalyst concentration of 1% wt., reaction time of 2 h, stirring speed of 1000 rpm and methanol to oil ratio of 8.50:1. Biodiesel blends, B10 and B20, were tested in a compression ignition engine, and the performance and emission characteristics were analyzed and compared with high-speed diesel. The engine was operated at full load conditions with engine speeds varying from 1000 rpm to 2400 rpm. All the performance and exhaust pollutants results were collected and analyzed. It was found that MOB10 produced lower BP (7.44%), BSFC (7.51%), and CO2 (7.7%). The MOB10 also reduced smoke opacity (24%) and HC (10.27%). Compared to diesel, MOB10 also increased CO (2.5%) and NOx (9%) emissions.

scholarly journals Research on China’s Energy External Dependence and Energy Strategy

2021 ◽  
Vol 245 ◽  
pp. 01047
Author(s):  
Yu Lulu ◽  
Li Zhao
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Supply And Demand ◽  
Tidal Energy ◽  
High Energy ◽  
Current Situation ◽  
High Tech ◽  
New Energy ◽  
The Times ◽  
External Dependence

After the reform and opening up, with the rapid development of economy and science and technology, high-tech products such as high-speed railway, train, aircraft, missile and rocket appear in response to the times. As people’s living standards develop, they have a high consumption demand towards energy. For example, coal gas and natural gas take the place of firewood, and various new energy such as wind energy, tidal energy and solar energy emerge. China is now seeing a rapid industrialization. Although the amount of China’s energy is large, the rigid demand of energy remains tense in supply and demand. Relatively speaking, China has a high energy external dependence, thus a series of measures were launched such as greatly advocating the implementation of new energy and reducing the exploitation quantity of coal properly. This paper will analyze the import and export data of various kinds of energy from 2015 to 2019 and calculate the external dependence level in 2019. After analyzing the current situation in China and consulting the national policies and information, the author will put forward suggestions on the current situation of China’s energy.

Investigating the Use of Heavy Alcohols as a Fuel Blending Agent for Compression Ignition Engine Applications

2012 ◽  
Author(s):  
Anita I. Ramírez ◽  
Sibendu Som ◽  
Lisa A. LaRocco ◽  
Timothy P. Rutter ◽  
Douglas E. Longman
Keyword(s):  
Diesel Fuel ◽  
High Speed ◽  
Cetane Number ◽  
Argonne National Laboratory ◽  
Operating Conditions ◽  
Injection Timing ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Performance And Emission

There has been an extensive worldwide search for alternate fuels that fit with the existing infrastructure and would thus displace fossil-based resources. In metabolic engineering work at Argonne National Laboratory, strains of fuel have been designed that can be produced in large quantities by photosynthetic bacteria, eventually producing a heavy alcohol called phytol (C20H40O). Phytol’s physical and chemical properties (cetane number, heat of combustion, heat of vaporization, density, surface tension, vapor pressure, etc.) correspond in magnitude to those of diesel fuel, suggesting that phytol might be a good blending agent in compression ignition (CI) engine applications. The main reason for this study was to investigate the feasibility of using phytol as a blending agent with diesel; this was done by comparing the performance and emission characteristics of different blends of phytol (5%, 10%, 20% by volume) with diesel. The experimental research was performed on a single-cylinder engine under conventional operating conditions. Since phytol’s viscosity is much higher than that of diesel, higher-injection-pressure cases were investigated to ensure the delivery of fuel into the combustion chamber was sufficient. The influence of the fuel’s chemical composition on performance and emission characteristics was captured by doing an injection timing sweep. Combustion characteristics as shown in the cylinder pressure trace were comparable for the diesel and all the blends of phytol at each of the injection timings. The 5% and 10% blends show lower CO and similar NOx values. However, the 20% blend shows higher NOx and CO emissions, indicating that the chemical and physical properties have been altered substantially at this higher percentage. The combustion event was depicted by performing high-speed natural luminosity imaging using endoscopy. This revealed that the higher in-cylinder temperatures for the 20% blend are the cause for its higher NOx emissions. In addition, three-dimensional simulations of transient, turbulent nozzle flow were performed to compare the injection and cavitation characteristics of phytol and its blends. Specifically, area and discharge coefficients and mass flow rates of diesel and phytol blends were compared under corresponding engine operating conditions. The conclusion is that phytol may be a suitable blending agent with diesel fuel for CI applications.

Recent Patents on the Angular Contact Ball Bearing of High-Speed Motorized Spindle

2020 ◽  
Vol 13 ◽  
Author(s):  
Yudong Bao ◽  
Linkai Wu ◽  
Yanling Zhao ◽  
Chengyi Pan
Keyword(s):  
High Speed ◽  
Ball Bearing ◽  
Rapid Development ◽  
Ceramic Materials ◽  
Development Trend ◽  
Numerical Control ◽  
Angular Contact Ball Bearing ◽  
Practical Applications ◽  
High Speed Cutting ◽  
Advantages And Disadvantages

Background:: Angular contact ball bearings are the most popular bearing type used in the high speed spindle for machining centers, The performance of the bearing directly affects the machining efficiency of the machine tool, Obtaining a higher value is the direction of its research and development. Objective:: By analyzing the research achievements and patents of electric spindle angular contact bearings, summarizing the development trend provides a reference for the development of electric spindle bearings. Methods:: Through the analysis of the relevant technology of the electric spindle angular contact ball bearing, the advantages and disadvantages of the angular contact ball bearing are introduced, and the research results are combined with the patent analysis. Results:: With the rapid development of high-speed cutting and numerical control technology and the needs of practical applications, the spindle requires higher and higher speeds for bearings. In order to meet the requirements of use, it is necessary to improve the bearing performance by optimizing the structure size and improving the lubrication conditions. Meanwhile, reasonable processing and assembly methods will also have a beneficial effect on bearing performance. Conclusion:: With the continuous deepening of bearing technology research and the use of new structures and ceramic materials has made the bearing's limit speed repeatedly reach new highs. The future development trend of high-speed bearings for electric spindles is environmental protection, intelligence, high speed, high precision and long life.

scholarly journals An Experimental Investigation on the Effect of Ferrous Ferric Oxide Nano-Additive and Chicken Fat Methyl Ester on Performance and Emission Characteristics of Compression Ignition Engine

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 265
Author(s):  
Ameer Suhel ◽  
Norwazan Abdul Rahim ◽  
Mohd Rosdzimin Abdul Rahman ◽  
Khairol Amali Bin Ahmad ◽  
Yew Heng Teoh ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Ferric Oxide ◽  
Fossil Fuels ◽  
Specific Energy Consumption ◽  
Experimental Results ◽  
Compression Ignition ◽  
Gas Temperature ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Chicken Fat

In recent years, industries have been investing to develop a potential alternative fuel to substitute the depleting fossil fuels which emit noxious emissions. Present work investigated the effect of ferrous ferric oxide nano-additive on performance and emission parameters of compression ignition engine fuelled with chicken fat methyl ester blends. The nano-additive was included with various methyl ester blends at different ppm of 50, 100, and 150 through the ultrasonication process. Probe sonicator was utilized for nano-fuel preparation to inhibit the formation of agglomeration of nanoparticles in base fuel. Experimental results revealed that the addition of 100 ppm dosage of ferrous ferric oxide nanoparticles in blends significantly improves the combustion performance and substantially decrease the pernicious emissions of the engine. It is also found from an experimental results analysis that brake thermal efficiency (BTE) improved by 4.84%, a reduction in brake specific fuel consumption (BSFC) by 10.44%, brake specific energy consumption (BSEC) by 9.44%, exhaust gas temperature (EGT) by 19.47%, carbon monoxides (CO) by 53.22%, unburned hydrocarbon (UHC) by 21.73%, nitrogen oxides (NOx) by 15.39%, and smoke by 14.73% for the nano-fuel B20FFO100 blend. By seeing of analysis, it is concluded that the doping of ferrous ferric oxide nano-additive in chicken fat methyl ester blends shows an overall development in engine characteristics.

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