摘要
从工程机械动态性能匹配理论研究出发,解决在连续高负荷、高温环境工况条件下工程机械柴油机冷却系统温度过高问题。对传统柴油机冷却系统模型进行动态化、精细化和模块化改良,提出了动态工况下的工程机械柴油机冷却系统热平衡模型。系统模型以柴油机转速随时间变化作为输入,各子系统模块均采用动态模型表征,并细化考虑了发动机舱温度对风扇进风温度的影响,以提高精度。模型能够反映转速变化对于冷却系统温度变化的动态特性,并通过与试验结果的比较,验证了该模型描述工程机械动态工况下冷却系统性能的有效性。
In order to match cooling system components with diesel engine and to prevent cooling system overheat of construction machinery diesel engine at high load and high temperature environment, the conventional cooling system method was improved through modularization, accuratization and dynamication, and a thermal equilibrium model with three dynamic thermal nodes was proposed. In this model, air temperature under engine hood, which would affect the air temperature inducted by cooling fan, was considered. The model＇s effectiveness in dynamic conditions was verified by experiment results. The results show that the model can reflect the dynamic behavior of coolant temperature with the variation of engine speed.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2009年第4期43-47,共5页
Chinese Internal Combustion Engine Engineering
基金
国家科技支撑计划资助项目(2007BAF10B00)
关键词
内燃机
柴油机
冷却系统
热节点模型
动态特性
工程机械
IC engine
diesel engine
cooling system
thermal node model
dynamic behavior
construction machinery
