Tests and numerical simulations on the thermal load of the cylinder head in heavy-duty vehicle diesel engines

Zhaowen Wang, Xiaobei Cheng, Ronghua Huang, Yiwei Huang, Jie Shen, Yuwei Zhong, Jun Qin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Scopus citations

Abstract

The paper has explored the solutions to the thermal overload in the cylinder head of a heavy-duty vehicle 6-cylinder diesel engine and the thermal cracks in the valve-bridge of the engine. The experiments include measuring the temperature of the cylinder head bottom and testing the flow distribution of coolant through the upper nozzles of cylinder head bottom. The follow-up analysis was conducted on the causes of the excessive thermal load of the cylinder head bottom, the thermal cracks in the valve-bridge region, and the rationality of the structure of the water jacket for the cylinder head. The mechanism of the water jacket of cylinder head was further inquired. Then 3-D CFD numerical simulation of water jacket in the sixth cylinder, which is in the worst cooling condition, is performed. To enhance the flow form in water jacket and lower the cost of enhancement, we proposed 4 schemes of water jacket and conducted the numerical simulations to these schemes. It was identified that all these schemes have efficiently improved the flow field in water jacket. In the typical proposed scheme 1 in which 6 nozzles of all the 10 upper nozzles were blocked, the coolant flow rate on the bottom of the water jacket and in the cylinder head valve-bridge region increased by about 68.73%. The measuring results of the cylinder head bottom temperature show that the maximum temperature in the valve-bridge region of cylinder head is reduced by 9.2°C and the temperature gradient reduction is 19.55 percent, suggesting that the thermal load and thermal stress of the studied diesel engine cylinder head has been significantly lowered.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference 2007
Pages361-373
Number of pages13
DOIs
StatePublished - Aug 22 2007
Event2007 ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference, JRCICE2007 - Pueblo, CO, United States
Duration: Mar 13 2007Mar 16 2007

Publication series

NameProceedings of the ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference 2007

Other

Other2007 ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference, JRCICE2007
CountryUnited States
CityPueblo, CO
Period3/13/073/16/07

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All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

Cite this

Wang, Z., Cheng, X., Huang, R., Huang, Y., Shen, J., Zhong, Y., & Qin, J. (2007). Tests and numerical simulations on the thermal load of the cylinder head in heavy-duty vehicle diesel engines. In Proceedings of the ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference 2007 (pp. 361-373). (Proceedings of the ASME/IEEE Joint Rail Conference and the ASME Internal Combustion Engine Division, Spring Technical Conference 2007). https://doi.org/10.1115/JRC/ICE2007-40018