Influence of altitude on matching characteristic of electronic-controlled pneumatic two-stage turbocharging system with diesel engine

Two-stage turbocharging technology is a solution to reduce turbo lag and improve the performance of engine and matching characteristics at high altitudes. In the present study, an engine testing system was established to study combustion performance and matching characteristics of a regulated two-stage turbocharging system (R2S) at different simulated altitudes. An equivalent turbocharger concept was put forward aiming to simplify the R2S with three bypass valves, and the total equivalent turbine flow area and equivalent efficiency of the R2S were obtained based on a theoretical study. Intake characteristics, combustion process, torque, power and fuel economy of the diesel engine matched with R2S were analyzed at different altitudes. The results showed that compared with 0 m, intake pressure, maximum combustion pressure, cumulative heat release, heat release rate decreased by 36.5%, 33.6%, 33.5%, 21.6%, −8.9% at 4000 r/min, and decreased by 12.3%, 2.9%, 16.4%, 8.8%, −5.4% at the speed of 2000 r/min at the altitude of 5000 m. The torque, fuel consumption and fuel consumption rate decreased by 10.1%, 5.1% and 5.4% at engine speed of 2000 r/min and by 35.7%, 27.6% and 8.9% at engine speed of 4000 r/min at 5000 m.

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An Experimental Study on the Performance and Emissions of Diesel Engine Fuelled with Biodiesel Derived from Palm Oil

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.699.654 ◽

2014 ◽

Vol 699 ◽

pp. 654-659 ◽

Cited By ~ 4

Author(s):

M. Jaat ◽

Amir Khalid ◽

B. Manshoor ◽

Him Ramsy ◽

Norrizal Mustaffa

Keyword(s):

Diesel Engine ◽

Fuel Consumption ◽

Palm Oil ◽

Engine Speed ◽

Consumption Rate ◽

Biodiesel Blends ◽

Fuel Consumption Rate ◽

Brake Power ◽

Smoke Opacity ◽

Biodiesel Fuels

The use of biodiesel as an alternative fuels in the diesel engine is very effective due to less of emissions and high performance. This study investigated the effect of palm oil blending and engine speed on performance and emission in diesel engine. The performance of biodiesel blends were investigated in terms of brake power, fuel consumption rate, flywheel torque, while emissions parameter was tested in terms of smoke opacity, hydrocarbon (HC), nitrogen oxide (NOx), carbon oxide (CO), carbon dioxide (CO2) and oxygen (O2) at various engine speed 1500, 2000, 2500 and 3000 revolution per minute (rpm). Biodiesel was blended with ordinary diesel fuel in various proportions. The engine was tested up to 50% load conditions by using Ordinary Diesel (OD), B5, B10 and B15 fuels. The properties of biodiesel fuel were tested including density, kinematic viscosity, water content and flash points test. Experimental results indicated that biodiesel blend shows the flywheel torque obtained is higher compared to the OD but fuel consumption rate and the brake power are quite similar when tested at ambient temperature. All biodiesel blends released good emissions compared to the OD. The CO2, CO, HC and O2 content released from the biodiesel fuels were clearly lower than the normal fuel except for NOX contents. Biodiesel released higher smoke opacity compared to OD at all range of engine speeds under 50% load condition. In conclusion, biodiesel fuels are found to offer better performances and emissions and are suitable to be used in unmodified diesel engine.

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PENGARUH SUHU BAHAN BAKAR TERHADAP KEPERLUAN BAHAN BAKAR PADA MOTOR DIESEL SATU SILINDER 20 HP DENGAN ELEKTROLISER

GEMA TEKNOLOGI ◽

10.14710/gt.v16i3.4708 ◽

2012 ◽

Vol 16 (3) ◽

pp. 122

Author(s):

Sutomo Sutomo ◽

Murni Murni ◽

Rahmat Rahmat

Keyword(s):

Diesel Engine ◽

Fuel Consumption ◽

Effective Temperature ◽

Consumption Rate ◽

Combustion Process ◽

Internal Combustion ◽

Fuel Consumption Rate ◽

Key Word

Sutomo, Murni, Rahmat, An internal combustion process of fuel will works effectively if the fuel’s density and viscosity is lower so we would like to use a heater in order to decrease the density and viscosity of the fuel. Based on this condition, we would like to use an electrolizer and a diesel engine to improve the fuel consumption. Electrolizer will increases the gas reaction so we hope that fuel consumption rate will decrease. The result of this research is the effective temperature of fuel is 50oC – 60oC will produce the effective combustion. The fuel consumption decreased in 6 kW is 0.12 lt/kWH. Key word: diesel engine, electrolizer, temperature

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The Effect of RME-1-Butanol Blends on Combustion, Performance and Emission of a Direct Injection Diesel Engine

Energies ◽

10.3390/en14102941 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2941

Author(s):

Wojciech Tutak ◽

Arkadiusz Jamrozik ◽

Karol Grab-Rogaliński

Keyword(s):

Diesel Engine ◽

Heat Release ◽

Direct Injection ◽

Specific Energy Consumption ◽

Combustion Process ◽

Constant Load ◽

Combustion Stability ◽

Performance And Emission ◽

Energy Share ◽

The Stability

The main objective of this study was assessment of the performance, emissions and combustion characteristics of a diesel engine using RME–1-butanol blends. In assessing the combustion process, great importance was placed on evaluating the stability of this process. Not only were the typical COVIMEP indicators assessed, but also the non-burnability of the characteristic combustion stages: ignition delay, time of 50% heat release and the end of combustion. The evaluation of the combustion process based on the analysis of heat release. The tests carried out on a 1-cylinder diesel engine operating at a constant load. Research and evaluation of the combustion process of a mixture of RME and 1-butanol carried out for the entire range of shares of both fuels up to 90% of 1-butanol energetic fraction. The participation of butanol in combustion process with RME increased the in-cylinder peak pressure and the heat release rate. With the increase in the share of butanol there was noted a decrease in specific energy consumption and an increase in engine efficiency. The share of butanol improved the combustion stability. There was also an increase in NOx emissions and decrease in CO and soot emissions. The engine can be power by blend up to 80% energy share of butanol.

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A Spray-Droplet Model for Diesel Combustion

Proceedings of the Institution of Mechanical Engineers Conference Proceedings ◽

10.1243/pime_conf_1969_184_316_02 ◽

1969 ◽

Vol 184 (10) ◽

pp. 28-35 ◽

Cited By ~ 18

Author(s):

J. Shipinski ◽

P. S. Myers ◽

O. A. Uyehara

Keyword(s):

Experimental Data ◽

Diesel Engine ◽

Heat Release ◽

Engine Speed ◽

Chamber Pressure ◽

Gas Temperature ◽

Single Droplet ◽

Burning Rates ◽

Burning Model ◽

The One

A spray-burning model (based on single-droplet theory) for heat release in a diesel engine is presented. Comparison of computations using this model and experimental data from an operating diesel engine indicate that heat release rates are not adequately represented by single-droplet burning rates. A new concept is proposed, i.e. a burning coefficient for a fuel spray. Comparisons between computations and experimental data indicate that the numerical value of this coefficient is nearly independent of engine speed and combustion-chamber pressure. However, the instantaneous value of the spray burning coefficient is approximately proportional to the instantaneous mass-averaged cylinder gas temperature to the one-third power.

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One-Dimensional Simulation of the Combustion Process in an Engine Cylinder with Ethanol

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.660.447 ◽

2014 ◽

Vol 660 ◽

pp. 447-451

Author(s):

Akasyah M. Kathri ◽

Rizalman Mamat ◽

Amir Aziz ◽

Azri Alias ◽

Nik Rosli Abdullah

Keyword(s):

Diesel Engine ◽

Alternative Fuels ◽

Engine Speed ◽

Combustion Process ◽

Cylinder Pressure ◽

Ethanol Fuel ◽

One Dimensional ◽

Engine Cylinder ◽

Dimensional Simulation ◽

The One

The diesel engine is one of the most important engines for road vehicles. The engine nowadays operates with different kinds of alternative fuels, such as natural gas and biofuel. The aim of this article is to study the combustion process that occurs in an engine cylinder of a diesel engine when using biofuel. The one-dimensional numerical analysis using GT-Power software is used to simulate the commercial four-cylinder diesel engine. The engine operated at high engine load and speed. The ethanol fuel used in the simulation is derived from the conventional ethanol fuel properties. The analysis of simulations includes the cylinder pressure, combustion temperature and rate of heat release. The simulation results show that in-cylinder pressure and temperature for ethanol is higher than for diesel at any engine speed. However, the mass fraction of ethanol burned is similar to that of diesel. MFB only affects the engine speed.

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A Study on the Calculation of Heat Release Rate to Compensate the Error Due to Single Zone Assumption in Diesel Engine

ASME 2005 Internal Combustion Engine Division Fall Technical Conference (ICEF2005) ◽

10.1115/icef2005-1298 ◽

2005 ◽

Author(s):

Seung Hyup Ryu ◽

Ki Doo Kim ◽

Wook Hyeon Yoon ◽

Ji Soo Ha

Keyword(s):

Diesel Engine ◽

Heat Release ◽

Computational Analysis ◽

Combustion Process ◽

Operating Conditions ◽

Zone Model ◽

Specific Heats ◽

Start Of Injection ◽

Release Analysis ◽

Improved Model

Accurate heat release analysis based on the cylinder pressure trace is important for evaluating combustion process of diesel engines. However, traditional single-zone heat release models (SZM) have significant limitations due mainly to their simplified assumptions of uniform charge and homogeneity while neglecting local temperature distribution inside cylinder during combustion process. In this study, a heat release analysis based on single-zone model has been evaluated by comparison with computational analysis result using Fire-code, which is based on multi-dimensional model (MDM). The limitations of the single-zone assumption have been estimated. To overcome these limitations, an improved model that includes the effects of spatial non-uniformity has been applied. From this improved single-zone heat release model (Improved-SZM), two effective values of specific heats ratios, denoted by γV and γH in this study, have been introduced. These values are formulated as the function of charge temperature changing rate and overall equivalence ratio by matching the results of the single-zone analysis to those of computational analysis using Fire-code about medium speed marine diesel engine. Also, it is applied that each equation of γV and γH has respectively different slopes according to several meaningful regions such as the start of injection, the end of injection, the maximum cylinder temperature, and the exhaust valve open. This calculation method based on improved single-zone model gives a good agreement with Fire-code results over the whole range of operating conditions.

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Establishment of a Two-Stage Turbocharging System Model and Analysis on Influence Rules of Key Parameters

Energies ◽

10.3390/en13081953 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1953

Author(s):

Wei Tian ◽

Defeng Du ◽

Juntong Li ◽

Zhiqiang Han ◽

Wenbin Yu

Keyword(s):

Diesel Engine ◽

Pressure Ratio ◽

Constraint Equation ◽

Optimization Method ◽

Expansion Ratio ◽

Total Energy Consumption ◽

Two Stage ◽

Constraint Equations ◽

Turbocharging System ◽

Target Pressure

This paper took a two-stage turbocharged heavy-duty six-cylinder diesel engine as the research object and established a two-stage turbocharging system matching model. The influence rules between the two-stage turbocharging key parameters were analyzed, while summarizing an optimization method of key parameters of a two-stage turbocharger. The constraint equations for the optimal distribution principle of the two-stage turbocharger’s pressure ratio and expansion ratio were proposed. The results show that when the pressure ratio constraint equation and expansion ratio constraint equation are satisfied, the diesel engine can achieve the target pressure ratio, while the total energy consumption of the turbocharger is the lowest.

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An Experimental Study of Two-Stage Combustion Strategy on Combustion and Emission Characteristics in a Diesel Engine Fueled With Biodiesel Blends

ASME 2012 Internal Combustion Engine Division Spring Technical Conference ◽

10.1115/ices2012-81178 ◽

2012 ◽

Cited By ~ 1

Author(s):

Donggon Lee ◽

Kyusoo Jeong ◽

Hyun Gu Roh ◽

Chang Sik Lee

Keyword(s):

Diesel Engine ◽

Engine Speed ◽

Direct Injection ◽

Injection Timing ◽

Emission Characteristics ◽

Two Stage ◽

Biodiesel Blends ◽

Injection Quantity ◽

Stage Combustion ◽

Conventional Diesel Fuel

This study describes the effects of two-stage combustion (TSC) strategy on combustion and emission characteristics in 4 cylinder common-rail direct injection (CRDI) diesel engine fueled with biodiesel blends. In the present work, to investigate the combustion and emission characteristics, the experiments were performed under various injection pressures, first injection quantity and first injection timing of TSC strategy at constant engine speed and engine load. In addition, conventional diesel fuel (ULSD) was used to compare with biodiesel blends. The experimental results show that combustion of biodiesel blends is stable for various test conditions regardless of blending ratio, and indicated specific fuel consumption (ISFC) was increased as biodiesel blending ratio increased. In the emission characteristics, biodiesel blends generated lower indicated specific nitrogen oxides (IS-NOx) and indicated specific soot (IS-Soot) emissions compared to those of ULSD when the first injection quantity increased.

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INFLUENCE OF THE BIODIESEL FUELS WITH MULTIFUNCTIONAL ADDITIVES ON THE DIESEL ENGINE EFFICIENCY

Proceedings of the 7th International Scientific Conference Rural Development 2015 ◽

10.15544/rd.2015.018 ◽

2015 ◽

Cited By ~ 1

Author(s):

Renaldas BARANAUSKAS ◽

Risto ILVES ◽

Arne KÜÜT ◽

Jüri OLT

Keyword(s):

Diesel Engine ◽

Fuel Consumption ◽

Engine Speed ◽

Repeated Loading ◽

Exhaust Gas ◽

Maximum Torque ◽

Engine Efficiency ◽

Multifunctional Additives ◽

Biodiesel Fuels

The article presents the tests of the engine Valmet 320 DS installed in the teststand "Schenck Dynas3 LI 250". For these tests biodiesel produced by JSC Rapsoila was used. The test was carried out causing the engine speed to 2600 rpm and loading gradually to maximum. Torque (Te), engine speed (ne), fuel consumption (Bf), the pressure in the cylinder (Pe) and exhaust gas CO, CO2, O2, HC, NOx were measured. Initially, measurements were carried out using biodiesel (RME). After that, biodiesel was added with the additive Valvoline VPS HD Diesel System Complete keeping a ratio of 100:1. In order to evaluate the effects of additives the engine was working two hours using biodiesel and additive mixture. After two hours the measurements were repeated loading the engine in the same mode. The work presents the results of tests carried out.

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