A Review of Energy Loss Reduction Technologies for Internal Combustion Engines to Improve Brake Thermal Efficiency

Zhijian Wang, Shijin Shuai, Zhijie Li and Wenbin Yu
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Zhijian Wang: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Shijin Shuai: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Zhijie Li: Weichai Power Co Ltd., Weifang 261061, China
Wenbin Yu: School of Energy and Power Engineering, Shandong University, Jinan 250061, China

Energies, 2021, vol. 14, issue 20, 1-18

Abstract: Today, the problem of energy shortage and climate change has urgently motivated the development of research engaged in improving the fuel efficiency of internal combustion engines (ICEs). Although many constructive alternatives—including battery electric vehicles (BEVs) and low-carbon fuels such as biofuels or hydrogen—are being put forward, they are starting from a very low base, and still face significant barriers. Nevertheless, 85–90% of transport energy is still expected to come from combustion engines powered by conventional liquid fuels even by 2040. Therefore, intensive passion for the improvement of engine thermal efficiency and decreasing energy loss has driven the development of reliable approaches and modelling to fully understand the underlying mechanisms. In this paper, literature surveys are presented that investigate the relative advantages of technologies mainly focused on minimizing energy loss in engine assemblies, including pistons and rings, bearings and valves, water and oil pumps, and cooling systems. Implementations of energy loss reduction concepts in advanced engines are also evaluated against expectations of meeting greenhouse gas (GHG) emissions compliance in the years to come.

Keywords: internal combustion engines; thermal efficiency; energy loss; fuel consumption; greenhouse gas (GHG) emissions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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