Liquid Gasoline Behavior in the Engine Cylinder of a SI Engine

1994 ◽  
Author(s):  
Younggy Shin ◽  
Wai K. Cheng ◽  
John B. Heywood
Keyword(s):  
Si Engine ◽  
Engine Cylinder

Thermodynamic Analysis of a Multi-Fueled Single Cylinder SI Engine

2011 ◽  
Author(s):  
M. Z. Haq ◽  
M. R. Mohiuddin
Keyword(s):  
Thermodynamic Analysis ◽  
Chemical Properties ◽  
Second Law Of Thermodynamics ◽  
Second Law ◽  
Si Engine ◽  
Gaseous Species ◽  
Single Cylinder ◽  
Engine Cylinder ◽  
Si Engines

The paper presents a thermodynamic analysis of a single cylinder four-stroke spark-ignition (SI) engine fuelled by four fuels namely iso-octane, methane, methanol and hydrogen. In SI engines, due to phenomena like ignition delay and finite flame speed manifested by the fuels, the heat addition process is not instantaneous, and hence ‘Weibe function’ is used to address the realistic heat release scenario of the engine. Empirical correlations are used to predict the heat loss from the engine cylinder. Physical states and chemical properties of gaseous species present inside the cylinder are determined using first and second law of thermodynamics, chemical kinetics, JANAF thermodynamic data-base and NASA polynomials. The model is implemented in FORTRAN 95 using standard numerical routines and some simulation results are validated against data available in literature. The second law of thermodynamics is applied to estimate the change of exergy i.e. the work potential or quality of the in-cylinder mixture undergoing various phases to complete the cycle. Results indicate that, around 4 to 24% of exergy initially possessed by the in-cylinder mixture is reduced during combustion and about 26 to 42% is left unused and exhausted to the atmosphere.

scholarly journals Thermal cycle of SI engine modeling with initial swirl proces into consideration

2008 ◽  
Vol 132 (1) ◽  
pp. 56-61
Author(s):  
Wojciech TUTAK
Keyword(s):  
Numerical Modelling ◽  
Thermal Cycle ◽  
Piston Engine ◽  
Si Engine ◽  
Engine Modeling ◽  
Engine Cylinder ◽  
Initial Charge ◽  
Experimental Researches

Results of numerical modelling the initial charge swirl in piston engine cylinder and the influence of swirl profile on engine thermal cycle parameters have been presented in the paper. The shape of initial swirl profile of modelled engine was determined on the basis of the experimental researches. It was taken into consideration because the proper level of turbulence before the initiation of combustion is very important for engine work. The research was conducted using KIVA-3V software.

Tumble and Swirl Quantification within a Motored Four-Valve SI Engine Cylinder Based on 3-D LDV Measurements

1997 ◽  
Author(s):  
Kasser Jaffri ◽  
Hans G. Hascher ◽  
Mark Novak ◽  
Keunchul Lee ◽  
Harold Schock ◽  
...  
Keyword(s):  
Si Engine ◽  
Engine Cylinder

Transformation of Existing SI Engine to Work with Pressurized Air

2020 ◽  
Vol 6 (11) ◽  
pp. 79-86
Author(s):  
P.Srinivas Reddy
Keyword(s):  
Environmentally Friendly ◽  
Power Source ◽  
Si Engine ◽  
Maximum Capacity ◽  
Engine Piston ◽  
Engine Design ◽  
Engine Cylinder ◽  
Fundamental Process ◽  
Center Position ◽  
Efficient Power

This project is an attempt to highlight the various possibilities of acquiring an environmentally friendly and efficient power source. The use of high pressure, expanding gas, to power the engine piston is the fundamental process in the function of all engines with reciprocating pistons. In this project we have used highly pressurized gas to cause reciprocation of the piston and thereby produce power. This gas is introduced into the engine cylinder at the Top Dead Center position of the piston through a timing valve, thereby giving the gas the maximum capacity to impart its force on the piston. The emission from this process is nil and 100% environmentally friendly. We have shown that with the smallest of changes in our existing engine design we can incorporate this technology in our present modes of transportation. The simple yet dramatic change brought by this system is according to us the most significant aspect of our invention. We have shown a positive way of implementing this technology and as always with any system; this has tremendous potential for improvement and perfection

scholarly journals Thermo Structural Analysis of Two Stroke Si Engine Cylinder

2016 ◽  
Vol 16 (053) ◽  
pp. 72-80
Author(s):  
Dayadi Nageswararao ◽  
Gobbur Mukesh
Keyword(s):  
Structural Analysis ◽  
Si Engine ◽  
Engine Cylinder

scholarly journals Tests of a SI engine powered by gaseous fuels blends of LPG + DME of various proportions with variable load

2021 ◽  
Author(s):  
Paweł Marzec
Keyword(s):  
Test Stand ◽  
Variable Load ◽  
Test Results ◽  
Chassis Dynamometer ◽  
Si Engine ◽  
Gaseous Fuels ◽  
Engine Cylinder

The article presents the test stand and the test results of a vehicle with an SI engine, fueled by a blends of LPG and DME gaseous fuels. During the tests, a chassis dynamometer was used, which reproducibly reflected road conditions. The tests were carried out for various shares of DME in the mixture, thus determining the maximum possible share of this fuel. The measuring points have been extended with different engine loads and different rotational speeds. The analysis of the pressure inside the engine cylinder made it possible to compare the operation of the engine powered by mixtures of different proportions to the reference fuel - LPG.

Heat Transfer Rate Enhancement of an Air Cooled Four Stroke SI Engine by Geometrically Modified Fins-A Review

2018 ◽  
Vol 4 (5) ◽  
pp. 4 ◽  
Author(s):  
Roshan Kumar Nirala ,Pushpendra Kumar Jain2
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Rate ◽  
Dissipation Rate ◽  
Transfer Rate ◽  
Heat Dissipation ◽  
Thermal Stresses ◽  
Working Fluid ◽  
Si Engine ◽  
Engine Cylinder ◽  
Engine Components

The engine cylinder is one of the major I C engine components, which is subjected to high temperature variations and thermal stresses. To cool the cylinder, fins are provided on the surface of the cylinder to increase the rate of heat transfer. By doing thermal analysis on the engine cylinder fins, it is helpful to know the heat dissipation inside the cylinder. The main aim of the paper is to increase the heat dissipation rate by using the invisible working fluid of air. It is observed that, by increasing the surface area the heat dissipation rate increases, further the main purpose of using these cooling fins is to cool the engine cylinder by air. This paper  presents a review to increase heat transfer rate in a four stroke S I engine by using geometrically modified fins

Energy and Exergy Based Analyses of a Multi-Fuelled SI Engine

2013 ◽  
Author(s):  
M. Z. Haq ◽  
A. Morshed
Keyword(s):  
Alternative Fuels ◽  
Engine Speed ◽  
Burning Velocity ◽  
Spark Ignition Engine ◽  
Si Engine ◽  
Engine Cylinder ◽  
Energy And Exergy ◽  
Si Engines ◽  
Exergy Analyses ◽  
Wiebe Function

The paper presents energy and exergy based analyses of a single cylinder, four-stroke, spark ignition engine fuelled by six different fuels namely iso-octane, methane, hydrogen, methanol, ethanol and n-butanol. Wiebe function is used to predict realistic burn rates. Since the Wiebe function parameters are generally optimized for conventional fuels, the current study modifies them for different alternative fuels using available burning velocity data. Heat losses throughout the cycle have been predicted by empirical correlations. Analyses are carried out to quantify energy and exergy of the premixed fuel-air mixture inside the engine cylinder at various phases of the cycle and some results obtained from the study are validated against data available in literature. Both energy and exergy destructions are found to be dependent on the fuels and engine operating parameters. Results show that at 1000 rpm, about 34–39% of energy contained in the fuel is converted into useful work and this quantity is found to increase with engine speed. Exergies associated with exhaust are found significantly lower than the corresponding energy values for all fuels. The present study highlights the necessity of both energy and exergy analyses to probe and identify the sources of work potential losses in SI engines in various phases of the cycle.

Cylinder Pressure Patterns in the SI Engine Fuelled by Methane and by Methane and Hydrogen Blends

2013 ◽  
Vol 210 ◽  
pp. 40-49 ◽  
Author(s):  
Andrzej Ambrozik ◽  
Tomasz Ambrozik ◽  
Dariusz Kurczyński ◽  
Piotr Łagowski ◽  
Edward Trzensik
Keyword(s):  
Alternative Fuels ◽  
Combustion Engine ◽  
Combustion Engines ◽  
Cylinder Pressure ◽  
Si Engine ◽  
Working Medium ◽  
Engine Cylinder ◽  
Long Time ◽  
The Subject ◽  
Object Of Control

nternal combustion engine has been in existence for a long time, but it is still in the scope of research interests and is contained in the subject matter of numerous development studies and analyses. The paper presents basic goals of research into combustion engines. A short characteristics of piston combustion engine as an object of control and adjustment was provided. It was indicated that measurements of the working medium cylinder pressure patterns could be applied to control the performance of the engine, especially the multi-fuel one. The paper presents the results of measurements of the working medium pressure patterns in the cylinder of 1.6 dm3X16SZR engine of Opel Astra car, which was fuelled by petrol, methane, and also by methane and hydrogen blends. Substantial differences in the cylinder pressure patterns were found for the engine running on alternative fuels and on conventional fuel. An increase in the hydrogen content in the blend resulted in an increase in the maximum pressures in the engine cylinder and improvements of indicated parameters when compared with the parameters determined for the engine fuelled by pure methane.

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