Simulation Investigation of Turbulent Jet Ignition (TJI) Combustion in a Dedicated Hybrid Engine under Stoichiometric Condition Tsinghua University

Format:

Book

Conference/Event

Author/Creator:

Liu, Shang, author.

Contributor:

Lin, Zhelong

Liu, Yang

Lu, Guoxiang

Qi, Yunliang

Wang, Bo

Wang, Zhi

Conference Name:

WCX SAE World Congress Experience (2024-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2024

Summary:

Turbulent jet ignition (TJI) combustion using pre-chamber ignition can accelerate the combustion speed in the cylinder and has garnered growing interest in recent years. However, it is complicated for the optimization of the pre-chamber structure and combustion system. This study investigated the effects of the pre-chamber structure and the intake ports on the combustion characteristics of a gasoline engine through CFD simulation. Spark ignition (SI) combustion simulation was also conducted for comparison. The results showed that the design of the pre-chamber that causes the jet flame colliding with walls severely worsen the combustion, increasing the knocking intendency, and decrease the thermal efficiency. Compared with SI combustion mode, the TJI combustion mode has the higher heat transfer loss and lower unburned loss. The well-optimized pre-chamber can accelerate the flame propagation with knock suppression. Strong-tumble flow distorts the jet flame propagation, which is not conducive to the development of combustion process. The TJI combustion mode combined with the new designed tumble-swirl intake port can increase the ITE by 0.7 % compared to SI combustion mode under condition of n = 3000 r/min and IMEP 1.0 MPa

Notes:

Vendor supplied data

Publisher Number:

2024-01-2111

Access Restriction:

Restricted for use by site license