某车用国Ⅳ柴油发动机冷却系统验证试验研究

Verification Test Study of the Cooling System of a State IV Vehicle Diesel Engine

为了验证优化设计后达到国Ⅳ排放标准的某型国产2.8 L柴油发动机冷却系统整体性能和相关零部件的可靠性和稳定性,在AVL公司开发的试验台架上对样机进行了历时八天的有关发动机冷却系统的单个零部件阻尼特性试验、稳态压力分布试验、节温器动态试验以及气蚀试验等,收集整理了试验工况环境下的发动机冷却系统的相关数据,通过直观的性能曲线将试验结果和设计参数进行了对比分析,验证了样机性能的最初设计指标,为发动机优化设计提供了可靠的基础数据。

In order to verify the reliability and stability of the whole performance and related components of the cooling system of a certain type of domestic 2. 8 L diesel engine whether to achieve State-iV emission standard after optimum design, a test bench developed by AVL is used to make a verification test on the single components of the engine cooling system of the prototype, including damping characteristics test, the pressure distribution test of steady state, thermostat dynamic test and cavitation test, etc. The test has continued on for 8 days, and some relevant test data have been collected and arranged con- cerning the engine cooling system under the environment of the test condition. Based on the intuitive performance curve, and through the comparison and analysis of the test result and the design parameters, it is very evident for us to verify the original design index of the prototype performance so as to provide reliable basic data for the optimum design of engines.