Ratio control of cvt is the key for engine running according to ideal curve , and controlling thrust of driving and driven pulley reasonably can improve efficiency and extend life - span of metal belt , and it is coupling relation between control of ratio and thrust 无级变速传动系统的速比控制是实现发动机按理想工作线运行的关键，合理控制主、从动带轮的夹紧力能提高传动效率和金属带的寿命，而夹紧力和速比控制存在耦合效应。
( 3 ) a new method of measuring slip ratio of cvt was proposed , and test device was also developped . some experiments were done on the cvt test bench . the relation of transmission ratio , clipped force of pulley and transmission torque was investigated by experiment ( 3 )提出了cvt传动滑移的工程测量方法，研制了相应的测量装置；在实验台上进行了大量的实验，得到了cvt传动速比夹紧力传递转矩之间的关系，测试了cvt的传动性能，研究了传动参数对传动滑移率和传动效率的影响。
Based on the analysis of motion characteristic of metal pushing v - belt type continuously variable transmission and transmission mechanism of metal belt , the relationship between the thrust of driving and the driven pulley are ascertained under no load and load , and the control model of pressure of driving and driven pulley oil cylinder are established in different ratio and transmitted torque 本论文在分析金属带式无级变速传动系统的运动特性及v型金属带的传动机理的基础上，确立了空载条件下和载荷条件下主、从动带轮的夹紧力及其关系，建立了在不同速比、不同输入转矩下主、从动带轮油缸压力控制模型。
Abstract : in view of the application of calculation formulae on clamping force of circular eccentric , this paper presents classification by self - locking degree and corresponding calculation of clamping force . on the basis of analyzing an comparing a - type and b - type eccentrics , it is concluded that the former has an advantage over the latter . and then the reasonableness of the standard eccentricity and tolerances is discussed and some revisions are suggested . this offers a dependable theoretical foundaation for design and application of the device 文摘:针对圆偏心夹紧机构夹紧力计算公式的应用问题，提出了按圆偏心自锁程度不同的分类方式及其相应的夹紧力计算方法；分析比较了a 、 b两类偏心的夹紧特性，得出了前者优于后者的正确结论；讨论了标准偏心轮的偏心距及其公差取值的合理性问题，并提出了相应的修改建议，为正确设计和应用该机构提供了可靠的理论依据。
In view of the application of calculation formulae on clamping force of circular eccentric , this paper presents classification by self - locking degree and corresponding calculation of clamping force . on the basis of analyzing an comparing a - type and b - type eccentrics , it is concluded that the former has an advantage over the latter . and then the reasonableness of the standard eccentricity and tolerances is discussed and some revisions are suggested . this offers a dependable theoretical foundaation for design and application of the device 针对圆偏心夹紧机构夹紧力计算公式的应用问题，提出了按圆偏心自锁程度不同的分类方式及其相应的夹紧力计算方法；分析比较了a 、 b两类偏心的夹紧特性，得出了前者优于后者的正确结论；讨论了标准偏心轮的偏心距及其公差取值的合理性问题，并提出了相应的修改建议，为正确设计和应用该机构提供了可靠的理论依据。
