Selected Issues of the Indicating Measurements in a Spark Ignition Engine with an Additional Expansion Process

Noga, Marcin

doi:10.3390/app7030295

Cited by 14 publications

(12 citation statements)

References 10 publications

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“…The other elements necessary to conduct the presented tests were a triggering system -a sequencer (1, 2), a valve control (4), a compressor (7), RCM (8), and a non-combustible gas bottle (9).…”

Section: Methodsmentioning

confidence: 99%

“…In an era of stringent standards for fuel consumption and emissions of exhaust gases from vehicle drive systems [1,2], one of the directions of development in the design of these systems is the use of alternative drive systems (hybrid, hydrogen drives) [3][4][5]. Traditional drive systems using spark-ignition combustion engines and compression-ignition engines are subject to modification [6][7][8][9], which can be summed up as actions involving downsizing, downspeeding, direct fuel injection, boosting and rightsizing [4,[10][11][12]. Possibilities presented by Isenstadt et al [13] for reducing fuel consumption on the example of Skyactiv-G engine ( Fig.…”

Section: Introductionmentioning

confidence: 99%

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Optical study of the use of recirculated gases for adiabatization of combustion process in the SIDI engine

2017

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Abstract. Proper delivery of gaseous components of the charge into the combustion chamber enables controlling of combustion in the aspect of adiabatization of the process. The adiabatization obtained as result of surrounding of combustible mixture by recirculated exhaust gases should contribute to reducing formation of harmful components created during this process. The key issue here is the formation of radicals, which is not sufficiently recognized according fuels surrounded by non-combustible gases. The innovative nature of this work ensues from the experimental confirmation of so defined organizing of combustion process. Currently there are no tests concerning attempts of gas separation in the combustion chamber of engine with external source of ignition. Such separation would contribute to the increase of the adiabatization process while at the same time the combustion rate increases and reduces the combustion duration. This paper presents the next stage of research, which were preceded by simulation and experimental investigations. In the article the results of the impact of the strategy of non-combustible gas injections on combustion ratios for cylinder head with a centrally positioned ignition point have been discussed. The analysis has been based on the photo material for the period from the start of ignition to full coverage of the cylinder by the flame. Authors performed a comparative analysis (against the recorded images) of the thermodynamic indexes of the combustion process obtained from the indicator traces.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical study of the use of recirculated gases for adiabatization of combustion process in the SIDI engine

2017

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“…In brief, the use of the process of additional expansion of exhaust gases is the more beneficial, the higher the temperature and pressure at the end of the main expansion process are. With a properly conducted combustion of the stoichiometric mixture these will depend on the amount of charge delivered to the cylinder [36,37]. In practice, the restriction is the increase in the exhaust gas pressure upstream from the turbine resulting from the increase of the required boost pressure.…”

Section: Brief Description Of the Engine And The Motivation For Aftermentioning

confidence: 99%

A three-way catalyst system for a five-stroke engine

Noga¹

2019

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This paper presents the results of research on the development of an exhaust gas aftertreatment system for a turbocharged five-stroke engine. This engine was designed and constructed at Cracow University of Technology. A characteristic feature of the five-stroke engine is the use of an additional expansion process to increase overall efficiency. A challenge for a catalytic converter is the fact that it has a low exhaust gas temperature. Two three-way catalytic converters were tested-one with a ceramic support and the second with a metal support. The results of the tests showed that the reactor with a ceramic support obtains an acceptable conversion efficiency starting with an exhaust gas temperature of 280°C. For the metal-support reactor, a few percent increase in torque and a decrease in the brake-specific fuel consumption of the engine was obtained; however, the converter itself did not show signs of operation even with an exhaust gas temperature of over 380°C. The performed analyses highlighted directions of further development works in this area.

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“…efficiency o results do n available for value of mec rather lower work also ou indicated in expansion c between the and the ind additional determine th expansion cy the engine cylinders de results of th expansion c crankshaft at this value the is due to the charge, it is below ambi results of cal the cycle of will be prese Indicating points in th marked in F the turbochar performance research stag n-cylinder p sors were loca djacent additio h was carried valve. Meas oelectronic pre per [33] an an e with additio . The results f the engine not deviate f r a five-strok chanical effici than that of to utlines the re the fired cy cylinder asse brake mean e dicated mean expansion c he energy re ylinders and t from whic liver power t he analysis cylinders de t a load of ab ey receive pow e fact that, w expanded in ent pressure lculating the i f engine with ented in this pa g measuremen he engine wo Figure 15 …”

Section: Indicate Turbochargmentioning

confidence: 99%

Various aspects of research of the SI engine with an additional expansion process

Noga

2017

MATEC Web Conf.

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Abstract. The paper presents an analysis of the results of the both experimental results and theoretical works on the SI engine with additional expansion of exhaust gases, also known as five-stroke engine. The engine like this was constructed at Cracow University of Technology as a retrofitted in-line four cylinder engine in which outer cylinders (1st and 4th) work as fired cylinders and inner cylinders (2nd and 3rd) work as volume for the additional expansion. The aim of development of such an engine is to gain higher energy recovery ratio of the combusted fuel through the second expansion of exhaust in a separate cylinder. The operating parameters of the engine in various versions were analyzed: as naturally aspirated, supercharged using a turbocharger with a waste-gate valve and a turbocharger with variable nozzle turbine. Selected results of the indicating measurements of the engine with special emphasis on the indicated thermal efficiency were presented. The results pointed out the directions of further optimization of the engine. These results are all the more important, because according to the author's knowledge, the research on the real object of this type are carried out in only one science center in the world besides Cracow University of Technology.

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Selected Issues of the Indicating Measurements in a Spark Ignition Engine with an Additional Expansion Process

Cited by 14 publications

References 10 publications

Optical study of the use of recirculated gases for adiabatization of combustion process in the SIDI engine

Optical study of the use of recirculated gases for adiabatization of combustion process in the SIDI engine

A three-way catalyst system for a five-stroke engine

Various aspects of research of the SI engine with an additional expansion process

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