New Design of the Five-Stroke Si Engine

Noga, Marcin

doi:10.5604/12314005.1136161

Cited by 11 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This engine has a displacement of 1.984 [dm 3 ] and is equipped with a system of direct fuel injection system (TFSI). Basic technical data of the test engine are presented in Table 2, while more detailed information regarding modifications to the engine can be found in paper [7].…”

Section: Experimental Research Of the Five-stroke Four-cylinder Enginementioning

confidence: 99%

Increase of efficiency of SI engine through the implementation of thermodynamic cycle with additional expansion

Noga¹,

Sendyka²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

Abstract. The paper presents the theoretical basis and practical implementation of the concept of a five-stroke cycle where an additional expansion of the working medium is achieved in a separate cylinder. The work, carried out at the Cracow University of Technology, constitutes a development of the idea of five-stroke engine. This paper proposes a new theoretical thermodynamic cycle that describes the processes occurring in a five-stroke engine. It has been taken into consideration that the expansion ratio of the engine is twice the compression ratio. At the next step an analysis of the thermodynamic cycle with particular emphasis on its thermal efficiency compared to efficiency of four-stroke engine has been shown. In the second part of the article selected research results of the five-stroke engine built based on the existing four-cylinder spark ignition engine have been presented. A comparison of the total efficiency obtained by the engine in the four-and five-stroke version has been provided. Similar comparisons for specific emission of the selected exhaust components have also been given.Key words: innovative five-stroke engine cycle, Carnot Cycle, Otto cycle, five-stroke engine, additional expansion, increase of thermal efficiency of the five-stroke engine cycle.

show abstract

Section: Experimental Research Of the Five-stroke Four-cylinder Enginementioning

confidence: 99%

Increase of efficiency of SI engine through the implementation of thermodynamic cycle with additional expansion

Noga¹,

Sendyka²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

show abstract

“…Since the engine was designed for the range extender application, the full load limit was defined as the point of drastic increases of fuel consumption with increasing torque, and a regular turbocharger could be employed. Noga et al [31,32] studied both theoretically and experimentally the similar concept to the five stroke cycle engines with the total expansion ratio twice than the compression ratio. They modified a four-cylinder four-stroke engine into a five stroke engine with remaining the outer two cylinders working with conventional four-stroke cycle and the inner two cylinders working only with expansion and exhausting strokes.…”

Section: Five Stroke Cycle Enginementioning

confidence: 98%

A comparison between Miller and five-stroke cycles for enabling deeply downsized, highly boosted, spark-ignition engines with ultra expansion

Wang

Zheng

2016

Energy Conversion and Management

View full text Add to dashboard Cite

“…The four-cylinder in-line spark-ignition engine, in which two inner cylinders serve as a common volume of additional expansion of exhaust gases coming from the outer fired cylinders, was designed and built at Cracow University of Technology in 2011-2013 as part of the project No. N N509 559040 [41]. The engine design was based on an existing four-cylinder four-stroke engine.…”

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

confidence: 99%

“…The basic technical specifications of the engine with additional expansion of exhaust gases developed at Cracow University of Technology in its current configuration are shown in Table 1. The engine developed at Cracow University of Technology was the subject of several previous studies [34][35][36][37] and [39][40][41]. These works focused mainly on aspects related to the description of the design itself in which the engine was constructed on the basis of an existing four-stroke engine, issues of the thermodynamic description of processes occurring in it and the analysis of engine test results in the context of its thermal and mechanical efficiency indicated the mean effective pressure and the ratio of exhaust energy recovery in cylinders of additional expansion.…”

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

New Design of the Five-Stroke Si Engine

Cited by 11 publications

References 0 publications

Increase of efficiency of SI engine through the implementation of thermodynamic cycle with additional expansion

Increase of efficiency of SI engine through the implementation of thermodynamic cycle with additional expansion

A comparison between Miller and five-stroke cycles for enabling deeply downsized, highly boosted, spark-ignition engines with ultra expansion

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

Contact Info

Product

Resources

About