Reducing the emissions and fuel consumption of a spark ignition engine by utilizing heat exchangers in the exhaust gas stream
- 1 June 2011
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
- Vol. 225 (6), 760-770
- https://doi.org/10.1177/0954407011399824
Abstract
In this study, an analytical technique has been used to design four types of heat exchanger in a spark ignition engine in an attempt to reduce both the warm-up period and the exhaust gas temperature under high-load conditions. The heat exchangers are installed in two different positions. One is installed after the outlet of the close-coupled catalytic converter to reduce the warm-up period, using the exhaust gas energy, and the other is installed between the exhaust manifold and the inlet of the close-coupled catalytic converter to avoid thermal ageing. To increase the heat transfer between the exhaust gas and the engine coolant, internally finned tubes have been selected. The first and second laws of thermodynamics are applied to optimize the number of fins and their geometry (i.e. the height and the thickness). Finally, the impact of heat exchangers on the warm-up period and the catalyst inlet temperature at high loads are presented. The results indicate that both the warm-up period and the exhaust gas temperature are decreased when the heat exchangers are installed along the exhaust gas stream. The results also show that a heat exchanger in the exhaust gas stream has the potential to reduce the requirement for high-load component-protection fuelling which, in turn, results in reduced fuel consumption and emissions.Keywords
This publication has 15 references indexed in Scilit:
- Water Cooled Exhaust Manifold and Full Load EGR Technology Applied to a Downsized Direct Injection Spark Ignition EngineSAE International Journal of Engines, 2010
- Cylinder head with integrated exhaust manifold for downsizing conceptsMTZ Worldwide, 2009
- Improving Fuel Economy in a Turbocharged DISI Engine Already Employing Integrated Exhaust Manifold Technology and Variable Valve TimingPublished by SAE International ,2008
- Design of a heat exchanger to reduce the exhaust temperature in a spark-ignition engineInternational Journal of Thermal Sciences, 2008
- Development of New Low Fuel Consumption 1.8L i-VTEC Gasoline Engine with Delayed Intake Valve ClosingPublished by SAE International ,2006
- Effect of Design Parameters on the Performance of Finned Exhaust Heat ExchangerPublished by SAE International ,2003
- Influence of Physical and Chemical Parameters on the Conversion Rate of a Catalytic Converter: A Numerical Simulation StudySAE International Journal of Advances and Current Practices in Mobility, 2000
- The Effect of Intermittent Engine Misfire and Air to Fuel Ratio Excursions on Exhaust Catalyst TemperaturePublished by SAE International ,1994
- A Model for the Investigation of Temperature, Heat Flow and Friction Characteristics During Engine Warm-UpSAE International Journal of Advances and Current Practices in Mobility, 1993
- Evolution of Pd/Rh TWC Catalyst TechnologyPublished by SAE International ,1993