<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

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

Technical Transactions

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{"article-title":"A three-way catalyst system for a five-stroke engine"}

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...

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

Published Online: May 23, 2020

Page range: 149 - 183

Received: Mar 19, 2019

DOI: https://doi.org/10.4467/2353737XCT.19.039.10213

Keywords
five-stroke engine, spark ignition, three-way catalyst, exhaust gas aftertreatment, conversion efficiency

© 2019 Marcin Noga, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

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

Published Online: May 23, 2020

Page range: 149 - 183

Received: Mar 19, 2019

DOI: https://doi.org/10.4467/2353737XCT.19.039.10213

Keywordsfive-stroke engine, spark ignition, three-way catalyst, exhaust gas aftertreatment, conversion efficiency

© 2019 Marcin Noga, published by Sciendo

This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Public License.

Keywords
five-stroke engine, spark ignition, three-way catalyst, exhaust gas aftertreatment, conversion efficiency