王?！⊥蹙疵?/p>

摘 要：為了設計出合理的活塞內冷油道，建立了活塞的三維實體模型以活塞及其內冷油道的有限元模型。通過對數(shù)十種內冷油道有限元模型的流場分析，確定了油孔內冷道形狀對活塞冷卻性能的影響，通過分析活塞整體溫度場，確定了內冷油道的安放位置，得到了合理的活塞內冷油道設計方案。

關鍵詞：活塞 內冷油道 CFD 溫度場

Design of a Diesel Engine Piston and its Internal Cooling Oil Passage

Wang Chu，Wang Jingming

Abstract：To design a reasonable piston internal cooling oil passage， a three-dimensional solid model of the piston is established with a finite element model of the piston and its internal cooling oil passage. Through the flow field analysis of dozens of finite element models of the internal cooling oil passage， the influence of the shape of the internal cooling passage in the oil hole on the cooling performance of the piston is determined， and the placement position of the internal cooling oil passage is determined by analyzing the overall temperature field of the piston. A reasonable design scheme for the internal cooling oil passage of the piston is proposed.

Key words：piston， internal cooling oil passage， CFD， temperature field