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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TN02000054" target="_blank" >TN02000054: Božek Vehicle Engineering National Center of Competence</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Article name in the collection

SAE Technical Papers 2025

ISBN

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ISSN

0148-7191

e-ISSN

0148-7191

Number of pages

21

Pages from-to

1-21

Publisher name

SAE International

Place of publication

Warrendale, PA

Event location

Detroit

Event date

Apr 8, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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