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Theoretical Consideration to Improve Engine Cooling and Application of Coupling 3D Combustion Simulations with Heat Transfer in Water Jacket and Components

Article of Honda R&D Technical Review Vol.15 No.2


Improving engine cycle thermal efficiency is an effective way to increase engine torque and to reduce fuel consumption simultaneously. However, the extent of the improvement is limited by engine knock, which is more evident at low engine speeds when combustion flame propagation is relatively slow. In this paper, computational fluid dynamics (CFD) tools were applied to evaluate the potential for improvement of V6 engine, and effectiveness of various design concepts of engine water jacket by judging surface heat transfer coefficient under isothermal condition. Theoretical considerations were given to optimize the cooling efficiency. Consequentially, engine performance was carried out in base engine and a prototype engine, improvement of engine output and fuel economy was confirmed. Furthermore, a new CFD methodology was developed in which iterative coupling approach was taken to include combustion chamber, water jacket and solid components. Component temperatures were predicted explicitly and compared with measurement results.


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Author (organization or company)

Jun XIN(Honda R&D Americas, Inc.)、Stephen SHIH(Honda R&D Americas, Inc.)、Edwin ITANO(Honda R&D Americas, Inc.)、Yoshio MAEDA(Honda R&D Co., Ltd.)、Michio KAWAMOTO(Honda R&D Co., Ltd.)、Yoshio YAMAMOTO(Honda R&D Americas, Inc.)

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