摘要
影响汽车无级变速器传动效率的决定性因素是夹紧力控制。过小的夹紧力会导致金属带与带轮产生滑转,过度的滑动会使金属带与带轮接触面间磨损严重,同时有效转矩传递的可靠性也随之下降。过大的夹紧力不但会增加不必要的摩擦损失,而且会降低金属带及带轮使用寿命,所需较大的液压系统压力也会导致发动机消耗于油泵的能量增加。通过对滑转率的分析和研究可以合理确定夹紧力的数值使其大小适度并一直处于最佳夹紧状态,无级变速器的传动效率就可以得到效提高。
It is the clamping force control that determining the factor on the drive efficiency of CVT. Smaller clam- ping force would cause slip between belt and pulleys. When the slip level reach a certain degree, the surface of the metal belt and the pulleys would be worn seriously, and the engine output torque wouldn＇t be transmitted reliably. While the bigger clamping force would not only raise unnecessary friction losses, but also reduce the life of the met- al belt. Excessive hydraulic system pressure would directly lead to the increasing of energy consumption of the en- gine. The drive efficiency for CVT would be improved while the control system make the clamping force being the best condition and the target clamping force is made reasonably.
出处
《机械科学与技术》
CSCD
北大核心
2013年第7期1060-1064,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
航院科技项目(HYKJ/2011B02)资助
关键词
无级变速器
夹紧力控制
滑转率
efficiency
metal V belt continuously variable transmission
clamp force control
slip
作者简介
姚文俊（1971-），副教授、工程师，硕士，研究方向为汽车新技术，yaowj@ntsc．edu．cn
