目的 在试验台架实现柴油机装车运行加载行为模拟,以有效解决实际使用过程中运行环境问题。方法 利用模糊聚类分析方法,在分析柴油机装车总体运行特征的基础上,对铺面路、起伏路、冰雪路、高速路、砂石路等5种路面的运行特征进行提取。针对柴油机装车过程中运行变化的特征,设计转速和扭矩、功率、转速变化率、扭矩变化率、扭矩和转速变化率、转速和扭矩变化率、功率变化率7种参数,对柴油机瞬态变化进行描述和分析。结果 获取了5种用户路面的典型运行工况,按照就近、强化的原则综合优化,形成了适用于台架的稳态工况。以5种路面综合的运行载荷数据为源,多参数描述并卡方计算获取了瞬态工况。二者综合优化,形成了适用于台架的模拟加载试验循环。结论 与实际行驶过程载荷相比,研究形成的循环载荷略高于实际,经其考核验证的柴油机产品装车应用后,运行环境问题大幅减少,用户体验感提高。
Abstract
The work aims to simulate the loading behavior of diesel engine during the driving on a test bench in order to effectively solve the operating environmental problems in actual service. Based on the analysis of the overall operating characteristics of diesel engine during driving, the fuzzy clustering analysis method was used to extract the operating characteristics on paved road, undulating road, icy and snowy road, highway and graveled road. Seven parameters were designed to describe and analyze the transient changes of diesel engines during the driving, including speed and torque, power, speed change rate, torque change rate, torque and speed change rate, speed and torque change rate, and power change rate. Finally, five typical operating conditions on user road were obtained, and a steady-state operating condition for the test bench was comprehensively optimized based on the principle of proximity and reinforcement. According to the data composed of five road pavements, transient operating conditions were obtained through multi-parameter description and chi square calculation. The comprehensive optimization of the two formed a simulation test cycle for the bench test. Compared with the load during the actual driving, the formed cycle load is slightly higher than the actual load. After the verification, it is proved that the operating problems of diesel engine have been significantly reduced, improving the user experience.
关键词
柴油机 /
道路运行 /
模糊聚类
Key words
diesel engine /
road driving /
fuzzy clustering
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