Optimization of compression ratio and injection timing of a diesel engine Fueled with oxygenated blends using fuzzy logic-based Taguchi method

2021 ◽  
pp. 1-21
Author(s):  
Ramesh Kumar Chidambaram ◽  
Ankit Sonthalia ◽  
Gopal Poornananadan ◽  
Edwin Geo Varuvel ◽  
Thiyagarajan Subramanian
Keyword(s):  
Fuzzy Logic ◽  
Diesel Engine ◽  
Taguchi Method ◽  
Compression Ratio ◽  
Injection Timing

scholarly journals Modification of a Direct Injection Diesel Engine in Improving the Ignitability and Emissions of Diesel–Ethanol–Palm Oil Methyl Ester Blends

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2644 ◽  
Author(s):  
Norhidayah Mat Taib ◽  
Mohd Radzi Abu Mansor ◽  
Wan Mohd Faizal Wan Mahmood
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Ambient Temperature ◽  
Palm Oil ◽  
Compression Ratio ◽  
Direct Injection ◽  
Cetane Number ◽  
Engine Performance ◽  
Injection Timing ◽  
Injection Strategies

Blending diesel with biofuels, such as ethanol and palm oil methyl ester (PME), enhances the fuel properties and produces improved engine performance and low emissions. However, the presence of ethanol, which has a small cetane number and low heating value, reduces the fuel ignitability. This work aimed to study the effect of injection strategies, compression ratio (CR), and air intake temperature (Ti) modification on blend ignitability, combustion characteristics, and emissions. Moreover, the best composition of diesel–ethanol–PME blends and engine modification was selected. A simulation was also conducted using Converge CFD software based on a single-cylinder direct injection compression ignition Yanmar TF90 engine parameter. Diesel–ethanol–PME blends that consist of 10% ethanol with 40% PME (D50E10B40), D50E25B25, and D50E40B10 were selected and conducted on different injection strategies, compression ratios, and intake temperatures. The results show that shortening the injection duration and increasing the injected mass has no significant effect on ignition. Meanwhile, advancing the injection timing improves the ignitability but with weak ignition energy. Therefore, increasing the compression ratio and ambient temperature helps ignite the non-combustible blends due to the high temperature and pressure. This modification allowed the mixture to ignite with a minimum CR of 20 and Ti of 350 K. Thus, blending high ethanol contents in a diesel engine can be applied by advancing the injection, increasing the CR, and increasing the ambient temperature. From the emission comparison, the most suitable mixtures that can be operated in the engine without modification is D50E25B25, and the most appropriate modification on the engine is by increasing the ambient temperature at 350 K.

scholarly journals Application of CFD, Taguchi Method, and ANOVA Technique to Optimize Combustion and Emissions in a Light Duty Diesel Engine

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Senlin Xiao ◽  
Wanchen Sun ◽  
Jiakun Du ◽  
Guoliang Li
Keyword(s):  
Diesel Engine ◽  
Taguchi Method ◽  
Fuel Consumption ◽  
Soot Formation ◽  
Dynamics Simulation ◽  
Injection Timing ◽  
Light Duty ◽  
Study Results ◽  
Main Injection ◽  
Pilot Fuel

Some previous research results have shown that EGR (exhaust gas recirculation) rate, pilot fuel quantity, and main injection timing closely associated with engine emissions and fuel consumption. In order to understand the combined effect of EGR rate, pilot fuel quantity, and main injection timing on theNOx(oxides of nitrogen), soot, and ISFC (indicated specific fuel consumption), in this study, CFD (computational fluid dynamics) simulation together with the Taguchi method and the ANOVA (analysis of variance) technique was applied as an effective research tool. At first, simulation model on combustion and emissions of a light duty diesel engine at original baseline condition was developed and the model was validated by test. At last, a confirmation experiment with the best combination of factors and levels was implemented. The study results indicated that EGR is the most influencing factor onNOx. In case of soot emission and ISFC, the greatest influence parameter is main injection timing. For all objectives, pilot fuel quantity is an insignificant factor. Furthermore, the engine with optimized combination reduces by at least 70% forNOx, 20% in soot formation, and 1% for ISFC, in contrast to original baseline engine.

Effect of Compression Ratio on the Performance Characteristics of a Palm Oil Methyl Ester Run Diesel Engine

2011 ◽  
Author(s):  
Biplab K. Debnath ◽  
Ujjwal K. Saha ◽  
Niranjan Sahoo
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Palm Oil ◽  
Compression Ratio ◽  
Cetane Number ◽  
Calorific Value ◽  
Injection Timing ◽  
Oxides Of Nitrogen ◽  
Promising Alternative ◽  
Standard Design

Palm Oil Methyl Ester (POME) is a very promising alternative renewable biofuel. This is because it has a better cetane number and a comparable lower calorific value with respect to its competitors. However, due to difference in molecular composition and hence dissimilar properties, it does not perform proficiently in diesel engine with standard design and operating parameters. Therefore, a study is arranged to realize the effect of compression ratio variation on POME run in diesel engine. The load is varied from ‘no load’ to ‘full load’ with six equal intervals. During this study, standard diesel injection timing is maintained unaffected. The study conveys that at higher compression ratio, POME causes reduction in brake fuel consumption and thereby increases the engine efficiency. The increase in compression ratio also causes smoother combustion, lower ignition delay with early heat release than diesel operation. The detrimental emission quantities in the form of carbon monoxide, oxides of nitrogen and hydrocarbon emissions are also cut down with presence of POME in the diesel engine at high compression ratio. Thus, POME can be regarded as a good alternative fuel for diesel engine for locomotive applications.

scholarly journals Effect of Combustion Parameters on Performance, Combustion and Emission Characteristics of a Modified Small Single-Cylinder Diesel Engine

2020 ◽  
Vol 8 (5) ◽  
pp. 622-630 ◽  
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Injection Pressure ◽  
Injection System ◽  
Combustion Characteristic ◽  
Experimental Investigations ◽  
Exhaust Emission ◽  
Injection Timing ◽  
Emission Characteristics ◽  
Single Cylinder

This paper represents the relative performance of a small single-cylinder diesel engine having capacity 3.5 kW. This paper covers experimental investigations of most influencing combustion parameters such as compression ratio, injection pressure and start of injection timing and their values on performance, emission and combustion characteristic of the small single-cylinder CRDI diesel engine for which the mechanical fuel injection system retrofitted with a simple version of the CRDI system. CRDI has yielded good results for large diesel and petrol engines but still not incorporate for cheaper small single-cylinder engines, typically used in the agricultural sector and decentralized power sector for a country like India. It is observed that starts of injection timing and injection pressure are the key parameters for improving the combustion characteristics and therefore engine performance while compression ratio mainly affects the emission characteristics of the engine. Retrofitted CRDI system yielded improved exhaust emission and performance of the engine.

Vehicle Emission Analysis by using Refined Sunflower Oil as Alternate Fuel and Varying the Injection Timing in Diesel Engine

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
J. Hemanandh ◽  
S. Ganesan ◽  
C. Sathya Sai Puneeth ◽  
G. Venkata Sai Naga Manikankata Tejesh
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Sunflower Oil ◽  
Methyl Esters ◽  
Direct Injection ◽  
Vehicle Emission ◽  
Injection Timing ◽  
Emission Analysis ◽  
Exhaust Temperature ◽  
Alternate Fuel

In this study, the emissions of Kirloskar Direct Injection 4-stroke Diesel engine, single cylinder air cooled, 4.4 kW, constant speed at 1500 rpm, compression ratio 17.5:1 with different blends of diesel refined sunflower oil is analysed. Methyl Esters of refined sunflower was trans-esterified before blending with diesel. The main objective of this experiment is to study the NOx, CO, HC and smoke emissions by varying the injection timing and load. The experiments were conducted with various blends - BRSF10, BRSF30, BRSF40, at different pressures (180 bar, 210 bar, and 240 bar) and different level of loads (0%, 25%, 50%, 75%, 100%). A 3-hole nozzle was used to inject the fuel. The combustion results were studied using AVL gas analyser. The results show that engine temperature decreases at higher loads by 2°, NOx and CO decreases and there was a marginal increase in HC and the exhaust temperature.

Improving the Performance of a Biogas Powered Dual Fuel Diesel Engine Using Emulsified Rice Bran Biodiesel as Pilot Fuel Through Adjustment of Compression Ratio and Injection Timing

2015 ◽  
Vol 137 (9) ◽  
Author(s):  
Bhaskor J. Bora ◽  
Ujjwal K. Saha
Keyword(s):  
Diesel Engine ◽  
Rice Bran ◽  
Compression Ratio ◽  
Droplet Diameter ◽  
Dual Fuel ◽  
Injection Timing ◽  
Two Phase ◽  
Water Emulsion ◽  
Hydrophilic Lipophilic Balance ◽  
Pilot Fuel

Emulsification is one of the proven techniques to control the pollutants of the diesel engines. The present work attempts to explore the effect of injection timing (IT) of pilot fuel and compression ratio (CR) for an emulsified rice bran biodiesel (RBB)–biogas powered dual fuel diesel engine. A two-phase stable water emulsion of rice bran methyl ester has been prepared by optimizing the factors such as water content (5% and 10%), surfactants (3%), and hydrophilic lipophilic balance (HLB) values (4.3, 5, and 6). The stability of the emulsions is determined on the basis of measurement of mean droplet diameter and stability test. For experimentation, a 3.5 kW single cylinder, direct injection (DI), water cooled, variable CR diesel engine is converted into a biogas run dual fuel diesel engine by connecting a venturi gas mixer at the inlet manifold. A set of combinations comprising CRs of 18, 17.5, and 17, and ITs of 23 deg, 26 deg, 29 deg, and 32 deg before top dead centers (BTDC) at different loading conditions are considered. The investigation demonstrates a maximum brake thermal efficiency (BTE) of 23.62% along with a liquid fuel replacement of 82.22% at pilot fuel IT of 29 deg BTDC and CR of 18. For the same combination, CO and HC emissions are found to be least in all the test cases.

Combustion of Raw Algae Oil and Its Methyl Ester in a Diesel Engine

2010 ◽  
Author(s):  
Yousef Haik ◽  
Mohamed Y. E. Selim ◽  
Taher Abdulrehman
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Compression Ratio ◽  
Combustion Noise ◽  
Design Parameters ◽  
Maximum Pressure ◽  
Injection Timing ◽  
Maximum Heat ◽  
Output Torque ◽  
Algae Oil

An experimental study has been carried to use raw Algae oil and its methyl esters in an indirect injection diesel engine. Effects of engine speed, engine load output, injection timing of the algae biofuel and engine compression ratio on the engine output torque, combustion noise (maximum pressure rise rate), maximum pressure and maximum heat release rate have been studied. Raw oil extracted from microalgae and its methyl ester have been evaluated in a Ricardo E6 engine. It has been shown that the algae oil methyl ester’s properties are similar to diesel fuel and its use has been successful in running the diesel engine smoothly. However, its use reduced the engine output torque slightly and increased the combustion noise. Nonetheless, the engine output can be increased and the combustion noise can be reduced by controlling the engine design parameters e.g. injection timing and compression ratio.

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