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

Format:

Book

Conference/Event

Author/Creator:

Vitek, Oldrich, author.

Contributor:

Klíma, Jiří

Macek, Jan

Mares, Bohumil

Vacek, Martin

Conference Name:

WCX SAE World Congress Experience (2025-04-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2025-01-8354

Access Restriction:

Restricted for use by site license