This paper studies velocity rigidity on hydrostatic transmission of bulldozer and volumetric efficiency of the variable pump and motor by means of simulation gives out the common principle of the motor selection and the range of displacement ratio on pump and motor .

运用仿真手段，研究了全液压推土传动系统的速度刚度和变量泵、马达的 容积效率，给出了全液压推土机的泵、马达配置的一般原则和合适的 排量比取值范围；

Volumetric Speed Control Closed Circuit Design of Double - action Variable Displacement Pump and Motor

双向变量 泵、马达 容积调速回路方案设计

Liquid hydrocarbons & Volumetric measurement by displacement meter systems other than dispensing pumps

GB/T17288-1998液态烃 体积测量 容积式流量计计量系统

Based on the vector relationship between volumetric position errors and displacement errors a new errors measurement method was put forward with sequential steps along the four body diagonals .

通过分析机床沿4条体对角线的 位移误差与 空间位置误差间的矢量关系，提出了利用体对角线多步运动测得的 位移误差分离机床运动轴 位置误差的 矢量分析方法。