Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve

The reduction of CO2 and, more generally, GHG (Green House Gases) emissions imposed by the European Commission (EC) and the Environmental Protection Agency (EPA) for passenger cars has driven the automotive industry to develop technological solutions to limit exhaust emissions and fuel consumption,...

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Main Authors: Usai Vittorio, Marelli Silvia, Renuke Avinash, Traverso Alberto
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:E3S Web of Conferences
Online Access:https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/39/e3sconf_supehr18_03020.pdf
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spelling doaj-8096e01384d34887850b640be4cafb562021-02-02T07:44:54ZengEDP SciencesE3S Web of Conferences2267-12422019-01-011130302010.1051/e3sconf/201911303020e3sconf_supehr18_03020Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valveUsai Vittorio0Marelli Silvia1Renuke Avinash2Traverso Alberto3University of GenoaUniversity of GenoaUniversity of GenoaUniversity of GenoaThe reduction of CO2 and, more generally, GHG (Green House Gases) emissions imposed by the European Commission (EC) and the Environmental Protection Agency (EPA) for passenger cars has driven the automotive industry to develop technological solutions to limit exhaust emissions and fuel consumption, without compromising vehicle performance and drivability. In a mid-term scenario, hybrid powertrain and Internal Combustion Engine (ICE) downsizing represent the present trend in vehicle technology to reduce fuel consumption and CO2 emissions. Concerning downsizing concept, to maintain a reasonable power level in small engines, the application of turbocharging is mandatory for both Spark Ignition (SI) and Diesel engines. Following this aspect, the possibility to recover the residual energy of the exhaust gases is becoming more and more attractive, as demonstrated by several studies around the world. One method to recover exhaust gas energy from ICEs is the adoption of turbo-compounding technology to recover sensible energy left in the exhaust gas by-passed through the waste-gate valve. In the paper, an innovative option of advanced boosting system is investigated through a bladeless micro expander, promising attractive cost-competitiveness. The numerical activity was developed on the basis of experimental data measured on a waste-gated turbocharger for downsized SI automotive engines. To this aim, mass flow rate through the by-pass valve and the turbine impeller was measured for different waste-gate settings in steady-state conditions at the turbocharger test bench of the University of Genoa. The paper shows that significant electrical power can be harvested from the waste-gate gases, up to 94 % of compressor power, contributing to fuel consumption reduction.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/39/e3sconf_supehr18_03020.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Usai Vittorio
Marelli Silvia
Renuke Avinash
Traverso Alberto
spellingShingle Usai Vittorio
Marelli Silvia
Renuke Avinash
Traverso Alberto
Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
E3S Web of Conferences
author_facet Usai Vittorio
Marelli Silvia
Renuke Avinash
Traverso Alberto
author_sort Usai Vittorio
title Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
title_short Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
title_full Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
title_fullStr Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
title_full_unstemmed Energy Harvesting Technology for turbocompounding automotive engines with waste-gate valve
title_sort energy harvesting technology for turbocompounding automotive engines with waste-gate valve
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2019-01-01
description The reduction of CO2 and, more generally, GHG (Green House Gases) emissions imposed by the European Commission (EC) and the Environmental Protection Agency (EPA) for passenger cars has driven the automotive industry to develop technological solutions to limit exhaust emissions and fuel consumption, without compromising vehicle performance and drivability. In a mid-term scenario, hybrid powertrain and Internal Combustion Engine (ICE) downsizing represent the present trend in vehicle technology to reduce fuel consumption and CO2 emissions. Concerning downsizing concept, to maintain a reasonable power level in small engines, the application of turbocharging is mandatory for both Spark Ignition (SI) and Diesel engines. Following this aspect, the possibility to recover the residual energy of the exhaust gases is becoming more and more attractive, as demonstrated by several studies around the world. One method to recover exhaust gas energy from ICEs is the adoption of turbo-compounding technology to recover sensible energy left in the exhaust gas by-passed through the waste-gate valve. In the paper, an innovative option of advanced boosting system is investigated through a bladeless micro expander, promising attractive cost-competitiveness. The numerical activity was developed on the basis of experimental data measured on a waste-gated turbocharger for downsized SI automotive engines. To this aim, mass flow rate through the by-pass valve and the turbine impeller was measured for different waste-gate settings in steady-state conditions at the turbocharger test bench of the University of Genoa. The paper shows that significant electrical power can be harvested from the waste-gate gases, up to 94 % of compressor power, contributing to fuel consumption reduction.
url https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/39/e3sconf_supehr18_03020.pdf
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