1、重庆升降机的两个油缸间距为2.5m，提升高度为1.2m，车前部比车后部重300kg，两个活塞在偏载条件下要求上升和下降必须同步平衡运行。
Two cylinders Wenzhou freight elevator pitch is 2.5m, lifting height of 1.2m, before the car is heavier than the car rear 300kg, two pistons under partial load conditions require a balance must be synchronized rise and fall run.
   
2、货梯用负载压力反馈的原理可补偿因负载变化而引起流量的变化，最后达到新的平衡，但它不能自动补偿在负载变化的动态过程中所积累的位置误差，只能起到控制流量分配的作用。
Wenzhou freight elevator with the principle of load pressure feedback can compensate for load changes caused by changes in flow, and finally reach a new equilibrium, but it can not compensate for position errors automatically load change in the dynamic process of the accumulated, can only play to control the flow distribution role.
   
3、货梯为了控制和弥补位置误差，在两个油缸下限位置分别设置了一个行程限位开关，使两个活塞在完成一个行程后，能自动调整一次位置误差，保证每次重新启动时都是从零位开始，因而满足了位置精度条件。
Wenzhou freight elevators in order to control and compensate position errors in the lower position of the two cylinders are provided with a travel limit switch, so that the two pistons after completing a trip, can automatically adjust a position error, ensure that each time you restart all from zero start, and thus satisfy the positional accuracy of the condition.
   
4、货梯车尾一边活塞不会因负载轻而上升得快，车前部的活塞也不会因负载重而上升得慢。在不平衡负载条件下保持平衡同步上升和下降，实现了特有的功能，克服了车身翻转下滑或抖动噪声，运动平稳无噪声。
Wenzhou Huoti rear side of the piston will not rise faster load is light, piston front car will not rise due to heavy load slowly. Kept under unbalanced load conditions balance has been rising and falling, to achieve a unique feature, the body overcome the decline or reversal dither noise, smooth movement without noise.