Investigation of Lips-Guided-Flow Combustion Chamber and Miller Cycle to Improve the Thermal Efficiency of a Highly Intensified Diesel Engine

Ziyu Wang, Rulou Cao, Yanfang Li, Caifeng Hao, Jinlong Liu, Yanzhao An () and Renwei Ma
Additional contact information
Ziyu Wang: China North Engine Research Institute, Tianjin 300400, China
Rulou Cao: China North Engine Research Institute, Tianjin 300400, China
Yanfang Li: China North Engine Research Institute, Tianjin 300400, China
Caifeng Hao: China North Engine Research Institute, Tianjin 300400, China
Jinlong Liu: China North Engine Research Institute, Tianjin 300400, China
Yanzhao An: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Renwei Ma: Jinkang New Energy Power Co., Ltd., Chongqing 401333, China

Sustainability, 2023, vol. 15, issue 20, 1-20

Abstract: An investigation into the lips-guided-flow combustion chamber (LGFC) and Miller cycle was conducted on a highly intensified diesel engine under rated power conditions to improve thermal efficiency. The radius and depth of the chamber bowl and lips were optimized to intensify the guided flow and fuel/air mixing. The experimental and simulated results show that the LGFC had a higher fuel/air mixture quality and quicker combustion rate, leading to a higher indicated power and higher thermal efficiency. A late intake valve closing (LIVC) Miller cycle with a higher expansion ratio of 11 and a lower compression ratio of 8.2 was used to control the energy distribution of the thermodynamic cycle and reduce the mechanical and thermal loads. The results show that the maximum combustion temperature was decreased by about 45 K and the thermal efficiency was improved by 2.1%. The research results are useful to guide the improvement in thermal efficiency through combustion chamber design and Miller cycle application for highly intensified diesel engines.

Keywords: highly intensified diesel engine; lips-guided-flow combustion chamber; Miller cycle; thermal efficiency (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/20/14968/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/20/14968/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:20:p:14968-:d:1261494

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().