柴油机机油冷却滤清模块的优化设计

Optimization design of diesel engine oil cooling filter module

基于柴油机热管理需求,从提升柴油机常用工况区机油温度、降低摩擦损失,以及优化机油流动阻力、降低机油泵泵送功率的角度出发,提出了机油温控设计方案,并据此设计开发了一款集成机油节温器的机油冷却滤清模块。运用计算流体力学(CFD)仿真,评估了该模块典型运行边界下的流体域分布,并通过快速成型件进行试验验证。结果表明:该模块设计方案基本实现了机油流向分配及阻力降低的目标;通过台架功能试验及行车路谱数据分析,机油节温器在管控油-水热交换、降低机油耗率方面有较大作用。

Based on the demand of thermal management, from the perspective of improving the oil temperature in common working conditions to reduce friction loss and optimizing the flow resistance of the system to reduce the pumping power of oil pumps, an oil temperature control scheme is proposed based on the structural principle of waterway thermostat, and an oil cooling and filtering module integrating oil thermostat is designed. Computational fluid dynamics(CFD) simulation was used to evaluate the fluid domain distribution at typical operating boundaries, and assisted by rapid prototyping samples for testing. The results show that the design scheme basically meets the goal of oil flow distribution and drag reduction targets. Through the bench function test and the analysis of the road spectrum data, the oil thermostat is of great help in controlling oil water heat exchange and reducing oil consumption.