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.

scholarly journals The possibilities of using DME (BioDME), as an additive to conventional gaseous fuels in SI engine

2017 ◽  
Vol 171 (4) ◽  
pp. 150-155
Author(s):  
Marek FLEKIEWICZ ◽  
Grzegorz KUBICA ◽  
Paweł MARZEC
Keyword(s):  
Mass Fraction ◽  
Negative Impact ◽  
Chassis Dynamometer ◽  
Si Engine ◽  
Engine Load ◽  
Gaseous Fuels ◽  
Fuel Blends ◽  
Performance And Emissions ◽  
Si Engines ◽  
And Storage

The results of SI engine fueled with blends of LPG and DME are presented in the paper. The range studies submitted includes measurements at varying engine loads, at selected values of speed. The research was conducted on a chassis dynamometer, specifying the engine load by the degree of throttle opening. Value of the mass fraction of DME in the blend with LPG was determined based on previous analyzes. The selected fuel blends containing from 7 to 17% DME (mass fraction). During the study was also performed a series of comparative measurements with pure LPG. Analyses show that of DME can be used as a partial substitute for LPG in SI engines. Its presence does not a negative impact on performance and emissions of the engine. The obtained results indicate that the amount of addition of DME should be varied depending on the engine load. Moreover, the use of this fuel does not require changes to the design fueling system and storage of LPG.

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 THE RESEARCH INTO THE INFLUENCE OF ECOLOGICAL PETROL ADDITIVES IN THE AUTOMOBILE LABORATORY

Transport ◽  
2004 ◽  
Vol 19 (1) ◽  
pp. 24-27 ◽  
Author(s):  
Algis Butkus ◽  
Saugirdas Pukalskas
Keyword(s):  
Engine Performance ◽  
Positive Influence ◽  
Pollutant Emission ◽  
Exhaust Emission ◽  
Chassis Dynamometer ◽  
Si Engine ◽  
Fuel Blend ◽  
Octane Rating ◽  
Reduce Emissions ◽  
The Eu

Looking forward to Lithuania becoming a member of the EU it is very important to use a larger amount of renewing fuel. Based on economic and environmental considerations in Lithuania, we are interested in studying the effects of ethanol contents in the blended ethanol‐petrol fuel on the engine performance and pollutant emission of SI engine. Therefore, we used engine test facilities to investigate the effects on the engine performance and pollutant emission of 3,5 % and 7,0 % ethanol in the fuel blend and special additives, which reduce emissions and increase octane rating. The tests were carried out in the laboratory on a chassis dynamometer with two different cars. The experiment results showed that ethanol used in a fuel blend with petrol had a positive influence on engine performance and exhaust emission.

Simulation on Vibration Isolation System for Vibratory-Drum Test Stand

2013 ◽  
Vol 365-366 ◽  
pp. 351-355 ◽  
Author(s):  
Zhi Feng Zhang ◽  
Hui Gan Xu ◽  
Xian Ning Kong ◽  
Yun Shi Yao
Keyword(s):  
Vibration Isolation ◽  
Performance Test ◽  
Simulation Analysis ◽  
Test Stand ◽  
Test Field ◽  
Test Results ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Rubber Tire ◽  
Vibration Performance

the reliability and vibration performance test of vibratory rollers have been done in the test field to ensure that the vibratory roller meet the quality requirement. At present, the indoor test stand for vibratory roller has not yet been studied at home and abroad. This paper designs the indoor test stand for vibratory roller and makes simulation analysis by the numerical model of vibration-drum and test stand. The vibration isolation system of test stand is determined as a function of the test stand mass (m2), the stiffness of rubber tire (k1) and the stiffness of the vibration isolation block (k2). The test results showed that the vibration drum-test stand model can account for the vibration isolation system.

Service Methane Number as a Means to Avoid Knock in Natural Gas Fuelled Spark Ignition Engines

2003 ◽  
Author(s):  
Guillaume Brecq ◽  
Camal Rahmouni ◽  
Abdellilah Taouri ◽  
Mohand Tazerout ◽  
Olivier Le Corre
Keyword(s):  
Good Accuracy ◽  
Spark Ignition ◽  
Experimental Investigations ◽  
Spark Ignition Engines ◽  
Mean Absolute Deviation ◽  
Si Engine ◽  
Absolute Deviation ◽  
Gaseous Fuels ◽  
Maximum Absolute Deviation ◽  
Methane Number

Experimental investigations on the knock rating of gaseous fuels were carried out on a single cylinder SI engine of Lister-Petter make. The Service Methane Number (SMN) of different gas compositions is measured and then compared to the standard Methane Number (MN), calculated by the AVL software. Effects of engine parameters, by mean of the Methane Number Requirement (MNR) are also highlighted. A linear correlation, between the SMN and the MN, has been obtained with a maximum absolute deviation lower than 2 MN units. A prediction correlation giving the MNR from engine parameters has finally been deduced from experimental data with a good accuracy (mean absolute deviation of 0.5 MNR unit).

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.

scholarly journals An overview of particle number emission from direct injection SI engine in scope of new legislation rules

2015 ◽  
Vol 163 (4) ◽  
pp. 67-78
Author(s):  
Michał OLCZYK ◽  
Bartosz HEJNY ◽  
Piotr BIELACZYC
Keyword(s):  
Particulate Matter ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Particle Number ◽  
Direct Injection ◽  
Legal Regulations ◽  
Test Results ◽  
Si Engine ◽  
Gasoline Engines ◽  
Lower Fuel Consumption

The main advantages of using direct injection in an SI engine, such as lower fuel consumption and higher thermal efficiency, implicate a new problem concerning gasoline engines: the emission of particulate matter. The observed issue has been a significant direction of development of the contemporary DISI engine over the last decade. This paper contains an overview of the results of PN emission, which were obtained from experiments conducted at BOSMAL and from the literature. Current and future legal regulations regarding PN emissions were collated to the test results.

scholarly journals Influence of LPG and DME Composition on Spark Ignition Engine Performance

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5583
Author(s):  
Paweł Fabiś ◽  
Bartosz Flekiewicz
Keyword(s):  
Detailed Analysis ◽  
Dimethyl Ether ◽  
Engine Performance ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Gaseous Fuel ◽  
Chassis Dynamometer ◽  
Engine Cylinder ◽  
Si Engines ◽  
Thermodynamic Processes

This article presents a detailed analysis of the potential of dimethyl ether (DME) fuel applications in SI engines. This paper presents the tests results completed on an 1.6-dm3 Opel Astra engine fueled by gaseous fuel as a mixture of LPG and DME. Dimethyl ether is a fuel with properties similar to liquid LPG fuel. In addition, DME is very well miscible with LPG, hence the possibility of creating a mixture with any DME divisions. The assessment of the possibility of using DME as a component of the mixture was carried out with the use of a chassis dynamometer and equipment, enabling an analysis of the changes taking place inside the cylinder. The results of the analyses are the parameters of the thermodynamic processes describing changes in the engine cylinder.

scholarly journals Application of the DIC Technique to Remote Control of the Hydraulic Load System

2020 ◽  
Vol 12 (21) ◽  
pp. 3667
Author(s):  
Radosław Jasiński ◽  
Krzysztof Stebel ◽  
Jarosław Domin
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Control Method ◽  
Test Stand ◽  
Reinforced Concrete Beams ◽  
Image Correlation ◽  
Optical Measurements ◽  
Electronic Speckle Pattern Interferometry ◽  
Bending Moments ◽  
Test Results

Displacements or deformations of materials or structures are measured with linear variable differential transducers (LVDT), fibre optic sensors, laser sensors, and confocal sensor systems, while strains are measured with electro-resistant tensometers or wire strain gauges. Measurements significantly limited to a point or a small area are the obvious disadvantage of these measurements. Such disadvantages are eliminated by performing measurements with optical techniques, such as digital image correlation (DIC) or electronic speckle pattern interferometry (ESPI). Many devices applied to optical measurements only record test results and do not cooperate with the system that exerts and controls load. This paper describes the procedure for preparing a test stand involving the Digital Image Correlation system ARAMIS 6M for remote-controlled loading. The existing hydraulic power pack (ZWICK-ROELL) was adapted by installing the modern NI cRIO-9022 controller operating under its own software developed within the LABVIEW system. The application of the DIC techniques to directly control load on the real structure is the unquestionable innovation of the described solution. This led to the elimination of errors caused by the test stand susceptibility and more precise relations between load and displacements/strains which have not been possible using the previous solutions. This project is a synergistic and successful combination of civil engineering, computer science, automatic control engineering and electrical engineering that provides a new solution class. The prepared stand was tested using two two-span, statically non-determinable reinforced concrete beams loaded under different conditions (force or displacement). The method of load application was demonstrated to affect the redistribution of bending moments. The conducted tests confirmed the suitability of the applied technique for the remote controlling and recording of test results. Regardless of the load control method (with force or displacement), convergent results were obtained for the redistribution of bending moments. Force-controlled rotation of the beam section over the support was over 50% greater than rotation of the second beam controlled with an increase in the displacement.

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