scholarly journals Nanoparticle Dispersed Fuels for Improving Diesel Engine Performance

2021 ◽  
Vol 23 (06) ◽  
pp. 1666-1671
Author(s):  
Manoj Kumar Elipey ◽  
◽  
Gopisetty Ravi Chandra ◽  
P. Sneha Latha ◽  
◽  
...  
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Chemical Compositions ◽  
Future Perspectives ◽  
Research Teams ◽  
Materials Engineering ◽  
Combustion Properties ◽  
Wide Range ◽  
Different Types ◽  
Dispersing Agents

The developments in materials engineering facilitated to production wide range of nanoparticles with enhanced performance in several engineering applications. Enhancing performance of diesel engine is on such application recently gained tremendous attention in the energy engineering. Using nanoparticles as additives in biodiesel or diesel has shown promising results as reported by several research teams across the globe. This paper provides a brief review of using nanoparticles as dispersing agents into fuel to improve the efficiency of the diesel engine. Using different types of nanoparticles and their role in altering the fuel combustion properties are discussed. Significant developments in using a wide range of nanoparticles of different chemical compositions as additives in fuel are summarized and presented with challenges and future perspectives.

Paper 2: Similarity Considerations in Assessing Diesel Engine Fuel Spray Requirements

1965 ◽  
Vol 180 (14) ◽  
pp. 10-29 ◽  
Author(s):  
B. E. Knight
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Engine Performance ◽  
Fuel Spray ◽  
Theoretical Expression ◽  
Engine Fuel ◽  
Wide Range ◽  
Air Mixing ◽  
Dimensionless Variables ◽  
Mixing Problem

A simplified dimensional analysis has been made of the fuel-air mixing problem in diesel engines. The dimensionless variables describing the mixing pattern have been expressed in terms of the dimensionless variables describing the engine and fuel injection conditions by means of explicit equations with numerical values for the constants. A wide range of such equations has been derived and tables of numerical values are given as examples, together with examples of engine air motion calculations for comparison. A theoretical expression for fuel-spray penetration into a cross-wind has been compared with a few experimental results. Engine smoke and specific consumption measurements have been plotted against the appropriate dimensionless variables in two instances. In both instances the response of the engine to the variables is quite different. It is believed that the wide range of methods of engine performance data analysis outlined in this paper will make a significant contribution to progress in understanding diesel engine combustion.

scholarly journals Engine Manifold Wave Action under Variable Stroke Length

2017 ◽  
Vol 11 (8) ◽  
pp. 79
Author(s):  
Jehad Ahmad Yamin
Keyword(s):  
Diesel Engine ◽  
Pressure Wave ◽  
Direct Injection ◽  
Engine Performance ◽  
Wave Action ◽  
Pressure Waves ◽  
Valve Timing ◽  
Stroke Length ◽  
Piston Bowl ◽  
Wide Range

A theoretical investigation on the pressure wave action of the manifolds of a four-stroke, direct injection (hereinafter referred to as DI), water-cooled, 4-stroke, diesel engine with variable stroke length was carried out.  The study was conducted over wide range of speeds (1000 - 3000 RPM at an increment of 500 RPM) and stroke lengths (130 mm to 210 mm at an increment of 20mm). The compression ratio was kept constant by adjusting the piston bowl volume. The study showed that shorter stroke lengths created favorable pressure waves in both inlet and exhaust manifolds at lower speeds, which resulted in improved engine volumetric and thermal efficiencies. At higher speeds, the larger strokes were favorable, however, due to less time available for the suction and exhaust strokes to be executed, the efficiencies were low. Advancing valve timing was one factor that improved the engine performance with larger stroke lengths.

Control-Oriented Model Development and Experimental Validation for a Modern Diesel Engine

2020 ◽  
Author(s):  
Kuo Yang ◽  
Pingen Chen
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Model Development ◽  
Engine Performance ◽  
Operating Conditions ◽  
Least Square ◽  
Injection Timing ◽  
Model Based ◽  
Wide Range ◽  
Mean Square Errors

Abstract Modern Diesel engines have become highly complex multi-input multi-output systems. Controls of modern Diesel engines to meet various requirements such as high fuel efficiency and low NOx and particulate matter (PM) emissions, remain a great challenge for automotive control community. While model-based controls have demonstrated significant potentials in achieving high Diesel engine performance. Complete and high-fidelity control-oriented Diesel engine models are much needed as the foundations of model-based control system development. In this study, a semi-physical, mean-value control-oriented model of a turbocharged Diesel engine equipped with high-pressure exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT) is developed and experimentally validated. The static calibration of Diesel engine model is achieved with the least-square optimization methodology using the experimental test data from a physical Diesel engine platform. The normalized root mean square errors (NRMSEs) of the calibration results are in the range of 0.1095 to 0.2582. The cross-validation results demonstrated that the model was capable of accurately capturing the engine torque output and NOx emissions with the control inputs of EGR, VGT and Start of Injection timing (SOI) in wide-range operating conditions.

Simulation of a Diesel Engine with Variable Geometry Turbocharger and Parametric Study of Variable Vane Position on Engine Performance

2017 ◽  
Vol 67 (4) ◽  
pp. 375 ◽  
Author(s):  
Anand Mammen Thomas ◽  
Jensen Samuel J. ◽  
Paul Pramod M. ◽  
A. Ramesh ◽  
R. Murugesan ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Parametric Study ◽  
Thermodynamic Simulation ◽  
Weight Ratio ◽  
Engine Performance ◽  
Boost Pressure ◽  
Variable Geometry ◽  
Variable Geometry Turbocharger ◽  
Additional Degree ◽  
Wide Range

Modelling of a turbocharger is of interest to the engine designer as the work developed by the turbine can be used to drive a compressor coupled to it. This positively influences charge air density and engine power to weight ratio. Variable geometry turbocharger (VGT) additionally has a controllable nozzle ring which is normally electro-pneumatically actuated. This additional degree of freedom offers efficient matching of the effective turbine area for a wide range of engine mass flow rates. Closing of the nozzle ring (vanes tangential to rotor) result in more turbine work and deliver higher boost pressure but it also increases the back pressure on the engine induced by reduced turbine effective area. This adversely affects the net engine torque as the pumping work required increases. Hence, the optimum vane position for a given engine operating point is to be found through simulations or experimentation. A thermodynamic simulation model of a 2.2l 4 cylinder diesel engine was developed for investigation of different control strategies. Model features map based performance prediction of the VGT. Performance of the engine was simulated for steady state operation and validated with experimentation. The results of the parametric study of VGT’s vane position on the engine performance are discussed.

scholarly journals Enhancing diesel engine performance by using nano-dispersing agents in fuel: A review

2021 ◽  
Vol 1185 (1) ◽  
pp. 012039
Author(s):  
Manoj Kumar Elipey ◽  
Gopisetty Ravi Chandra ◽  
P. Sneha Latha ◽  
Anchupogu Praveen ◽  
B. Ratna Sunil
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Dispersing Agents

scholarly journals Effects of bioethanol ultrasonic generated aerosols application on diesel engine performances

2015 ◽  
Vol 19 (6) ◽  
pp. 1931-1941 ◽  
Author(s):  
Florin Mariasiu ◽  
Nicolae Burnete ◽  
Dan Moldovanu ◽  
Bogdan Varga ◽  
Calin Iclodean ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Environmental Protection ◽  
Fuel Consumption ◽  
Engine Performance ◽  
Pollutant Emissions ◽  
Brake Specific Fuel Consumption ◽  
Ultrasound Device ◽  
Different Types ◽  
Performance And Emissions ◽  
Bioethanol Fuel

In this paper the effects of an experimental bioethanol fumigation application using an experimental ultrasound device on performance and emissions of a single cylinder diesel engine have been experimentally investigated. Engine performance and pollutant emissions variations were considered for three different types of fuels (biodiesel, biodiesel-bioethanol blend and biodiesel and fumigated bioethanol). Reductions in brake specific fuel consumption and NOx pollutant emissions are correlated with the use of ultrasonic fumigation of bioethanol fuel, comparative to use of biodiesel-bioethanol blend. Considering the fuel consumption as diesel engine?s main performance parameter, the proposed bioethanol?s fumigation method, offers the possibility to use more efficient renewable biofuels (bioethanol), with immediate effects on environmental protection.

Factorial analysis of diesel engine performance using different types of biofuels

2007 ◽  
Vol 84 (4) ◽  
pp. 401-411 ◽  
Author(s):  
Ghassan M. Tashtoush ◽  
Mohamad I. Al-Widyan ◽  
Aiman M. Albatayneh
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Factorial Analysis ◽  
Different Types

scholarly journals Features of the working process of high-speed diesel engines

2021 ◽  
Vol 264 ◽  
pp. 04021
Author(s):  
Sarvar Kadirov ◽  
Madamin Aripdjanov ◽  
Obidjon Ergashev ◽  
Ravshan Iskandarov
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
High Speed ◽  
Engine Performance ◽  
Injection Pressure ◽  
Working Process ◽  
High Speed Diesel ◽  
Wide Range ◽  
History Of ◽  
Main Factors

This article discusses the main history of the creation of high-speed short-stroke diesel engines and an assessment of the main factors that most significantly affect the working process of a diesel engine. When developing a new design of a high-speed diesel engine, it is necessary to pay special attention to the following factors: the intensity of the air charge, injection pressure parameters, the shape of the combustion chamber and the choice of the best option. Research carried out with a 7 x 0.15 mm nozzle in a wide range of speed changes (n = 1000 + 2800 min-1) shows that it is possible to find a position of the widened valve at which optimal results are obtained at medium and high rotational speeds, and on small - engine performance will deteriorate slightly.

Experimental Investigations on Noise Attenuation of a Twin Cylinder Stationary Diesel Engine with Different Types of Mufflers

1999 ◽  
Vol 121 (3) ◽  
pp. 351-354
Author(s):  
B. K. Venkanna ◽  
Swati B. Wadawadagi
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Noise Pollution ◽  
Sound Attenuation ◽  
Control Measures ◽  
Experimental Investigations ◽  
Human Society ◽  
Load Range ◽  
Wide Range ◽  
Exhaust Line

Together with atmospheric and water pollution, noise pollution is threatening human society with vehicles constituting the major source of noise. The available literature on control measures (1, 2, 3) indicates purely reactive mufflers in general are of more use for fixed speed machinery and dissipative attenuators have the ability to filler out acoustic energies over a wide range of frequencies. This paper presents cm attempt made to use a combination of these major types of mufflers fitted in the exhaust line of a four stroke, twin cylinder stationary diesel engine to attenuate exhaust noise to an acceptable level. A sound attenuation of 19 dBA has been obtained for combined reactive and dissipative (Model—M2, loosely packed with glass wool) attenuator through entire the load range without affecting the engine performance and a sound attenuation of 21 dBA has been obtained for reactive (with baffle plate. Model—M3) muffler through the entire load range with a nominal increase in BSFC at higher loads.

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