The Development Of Thermal Management System Test Platform For Construction Machinery

Thermal management system, which is based on the systems integration and holistic view, controls the relationship of the operating condition of engine even the vehicle and the quantity of heat, optimizes the transition of heat by general control means as well. It directly influences the economic performance and emission quality of engine and is one of the hot researches in the field of power machinery & vehicular engineering.Thermal management system needs lots of basic data, which are the relationships of radiators and operating condition. Research methods are experimentation test and simulation. However, there is a difficulty by reason of the shortage of basic data and interrelated control strategies. This dissertation is on the basis of host of reference books, aims at the shortage of basic data and combines the real situation of a subject, which is cooperated with the Guangxi Liugong Machinery Co., Ltd.Thermal management system test platform is the basis of thermal management system for vehicle. The basic functions are evaluating the performance of the cooling system, selecting and matching the parts of the cooling system as well as making a study on the control strategy of the cooling system. The test platform is composed of a system of process simulation and a system of test and data processing, which is used to measure and control the parameters of the cooling system on real time, such as the temperature, the pressure, the rate of flow, etc. The test platform can also analyze and display the test data on the spot as well as save, query and print the test data and history records.The main works done in this dissertation are as follows:(1) I have finished the summarization and analysis of the interrelated techniques on thermal management system.(2) I have finished the project design of thermal management system test platform and contrasted the advantages and disadvantages of each project design.(3) Under the co-operation of my research group, we have successfully put up the test platform. I mainly answer for the software design and provide some hardware support.(4) I have finished the experiments of ZL50G when transmission system works, hydraulic system works, transmission system and hydraulic system work together respectively, calculated the quantity of heat of every part and analyzed the influencing factors. Meanwhile I have analyzed the relationship of wind speed and engine rotate speed as well.