Theoretical Study of Electrically Assisted Two-Stage Turbocharger Boost System Applied to Large-Bore Gas SI ICE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00389919" target="_blank" >RIV/68407700:21220/25:00389919 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.4271/2025-01-8354" target="_blank" >https://doi.org/10.4271/2025-01-8354</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2025-01-8354" target="_blank" >10.4271/2025-01-8354</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Theoretical Study of Electrically Assisted Two-Stage Turbocharger Boost System Applied to Large-Bore Gas SI ICE

Popis výsledku v původním jazyce

Large-bore gas SI ICEs are supposed to operate under more strict conditions in terms of NOx level and potentially using new generation of fuels (e.g., hydrogen, ammonia) in the near future. Currently, the TA Luft norm is being considered while typical BMEP levels are between 22-28 bar. It is expected that NOx will have to drop significantly (down to 20% or even below 10% of the amount based on TA Luft) while engine BMEP is supposed to be increased above 30 bar. The paper is based on 0-D/1-D simulations while using the experience gained from older research projects concerning similar engines. The main goal is to study the influence of different operating conditions (e.g., NOx level, BMEP level, control means, ambient conditions) on both ICE performance and turbocharger operation while comparing classical 2-stage system with 2 electrically assisted ones (e-turbo, e-booster) - steady state performance is of the main focus while transient one is also considered. Complex optimizations were carried out to achieve optimal solution for every considered operating case. The main conclusion is that the potential to improve BSFC when e-assisted turbocharging is applied under the steady-state operation is low and it makes sense only under specific conditions. On the other hand, e-assistance significantly improves engine transient response.

Název v anglickém jazyce

Theoretical Study of Electrically Assisted Two-Stage Turbocharger Boost System Applied to Large-Bore Gas SI ICE

Popis výsledku anglicky

Large-bore gas SI ICEs are supposed to operate under more strict conditions in terms of NOx level and potentially using new generation of fuels (e.g., hydrogen, ammonia) in the near future. Currently, the TA Luft norm is being considered while typical BMEP levels are between 22-28 bar. It is expected that NOx will have to drop significantly (down to 20% or even below 10% of the amount based on TA Luft) while engine BMEP is supposed to be increased above 30 bar. The paper is based on 0-D/1-D simulations while using the experience gained from older research projects concerning similar engines. The main goal is to study the influence of different operating conditions (e.g., NOx level, BMEP level, control means, ambient conditions) on both ICE performance and turbocharger operation while comparing classical 2-stage system with 2 electrically assisted ones (e-turbo, e-booster) - steady state performance is of the main focus while transient one is also considered. Complex optimizations were carried out to achieve optimal solution for every considered operating case. The main conclusion is that the potential to improve BSFC when e-assisted turbocharging is applied under the steady-state operation is low and it makes sense only under specific conditions. On the other hand, e-assistance significantly improves engine transient response.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/TN02000054" target="_blank" >TN02000054: Národní centrum kompetence inženýrství pozemních vozidel Josefa Božka</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

SAE Technical Papers 2025

ISBN

—

ISSN

0148-7191

e-ISSN

0148-7191

Počet stran výsledku

21

Strana od-do

1-21

Název nakladatele

SAE International

Místo vydání

Warrendale, PA

Místo konání akce

Detroit

Datum konání akce

8. 4. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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