综合传动装置起动扭矩测试试验研究

Research on Test Method of Starting Torque with Integrated Transmission System

摘要:

低温环境起动性能是表征车辆动力性能的一项重要指标；对液力机械传动车辆而言,由于综合传动装置自身技术特点,改善车辆起动性能除应当考虑发动机自身起动阻力外,还应当考虑综合传动装置的起动阻力；在系统分析综合传动装置技术特点和功率流向的基础上,总结了发动机起动过程的主要特征,提出采用稳态试验与动态试验相结合的台架试验方法进行综合传动装置起动扭矩测试；以某高速履带车辆为研究对象,进行了综合传动装置起动扭矩测试；试验结果表明,传动油温的变化和各类油泵的功率消耗是决定综合传动装置起动扭矩大小的关键因素,为改进车辆总体设计和提高车辆起动性能提供了依据。

Abstract:

Low temperature starting performance is an important indicator of the dynamic performance of vehicles. For vehicles with hydrodynamic-mechanical transmission, due to the technical characteristics of integrated transmission, not only engine starting resistance but also integrated transmission starting resistance should be considered to improve vehicle starting performance. The main features of the engine start process are summarized and the bench test method combining steady-state test and dynamic test is proposed to be used to test the starting torque of integrated transmission based on a systematic analysis of technical characteristics and power flow of integrated transmission. Taking a high-speed tracked vehicle as the object, the starting torque of integrated transmission is tested. The results indicate that the change of transmission oil temperature and the power consumption of various types of pumps are the key factors that determine starting torque of transmission, which provide a basis for improving overall design and starting performance of vehicles.