无级变速器用反比例溢流阀特性分析与试验.pdf

2 0 0 8 年 7 月 农 业 机 械 学 报 第 39 卷 第 7 期 无级变速器用反比例溢流阀特性分析与试验 何　仁　吴海啸　张　涌　夏晶晶　牟正明 　　【摘要】　针对无级变速器用反比例溢流阀在 CV T 工作过程中的特性 ,建立了反比例溢流阀压力、流量等特性 模型 ,并对模型进行了分析和仿真 ;建立了电磁阀的试验台和试验标准 ,并对反比例溢流阀的静态特性和动态特性 进行了试验 ;试验结果表明该反比例溢流阀具有良好的静态和动态特性 ,能够满足对 CV T 精确控制的需要。 关键词 : 无级变速器 　反比例溢流阀 　数学模型 　试验 中图分类号: U463 212 文献标识码 : A Analysis and Experiment on Characteristics of Electrohydraulic Inverseproportional Relief Valve Used in CVT 1 1 2 1 2 He Ren 　Wu Haixiao 　Zhang Yong 　Xia Jingjin g 　Mou Zhengming ( 1. Jian gsu U niversity , Zhenjian g 212013 , China ) 2 . N anjin g A utomobile Corporation , N anjin g 210028 , China Abstract In order to understand the characteristics of the electrohydraulic inverseproportional relief valve used in the continuously variable transmission (CV T) , a mathematical model with pressure and flux of the electrohydraulic inverseproportional relief valve was established. The model was analyzed and simulated , subsequently. The testbed was designed and a test standard was put forward , and tests of static characteristics and dynamic characteristics of the electrohydraulic inverseproportional relief valve were carried out . The experimental results indicate that the performances of the static characteristics and dynamic characteristics of the electrohydraulic inverseproportional relief valve are excellent , and it can satisfy precision control of the CV T. Key words 　Continuously