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CVT contact-pressing device with electronic control, in particular for highly dynamic operating conditions

机译:带电子控制的CVT压触装置,特别是在高度动态的工作条件下

摘要

Contact-pressing device for CVT (continuously variable transmission), comprising both pressure medium supply devices and open-loop and closed-loop control devices for the contact pressure, for operating conditions having spontaneous torque loading peaks. Ensuring and building up sufficient contact pressure force in the case of highly dynamic operation require relatively large pressure medium supply devices, because of the elasticities necessarily present in the hydraulic and mechanical systems and components of the CVT (inertias). Obvious, correspondingly largely dimensioned contact pressure and adjusting pressure medium supply devices on the CVT, which could undertake this task concomitantly but would have to operate continuously under the highest disk set pressure, are not acceptable on economic grounds. Solutions according to the invention of low-loss, highly dynamic pressure medium supply, open-loop and closed-loop control systems exist in the following embodiment versions as a result of the arrangement of: - a pressure store and a rapidly switching digital-process computer-controlled servo valve which modulates contact pressure peaks to the basic contact pressure set for static operating conditions; - a modification having a differential piston which increases the contact pressure with respect to the store pressure level; - an additional or separate, largely dimensioned hydraulic pump which, in normal operation, delivers in a low-pressure and low-loss manner in a circuit and is only activated as required for the spontaneous increase of contact pressure force. A further useful effect consists... Original abstract incomplete. IMAGE
机译:用于CVT(无级变速器)的压紧装置,包括压力介质供给装置以及用于接触压力的开环和闭环控制装置,用于具有自发扭矩峰值的运行条件。在高动态操作的情况下,要确保和建立足够的接触压力,就需要相对较大的压力介质供应装置,因为液压和机械系统以及CVT部件(惯性)中必然存在弹性。从经济的角度来看,CVT上明显,尺寸相应较大的接触压力和调节压力介质供应装置可以同时执行此任务,但必须在最高的盘设定压力下连续运行,这是不可接受的。由于以下布置,在以下实施例形式中存在根据本发明的低损耗,高动态压力介质供应,开环和闭环控制系统的解决方案:-压力存储器和快速切换的数字过程计算机控制的伺服阀,可将接触压力峰值调节至为静态工作条件设定的基本接触压力; -具有差动活塞的变型,该差动活塞相对于存储压力水平增加了接触压力; -一个附加的或单独的,尺寸较大的液压泵,在正常操作中,该液压泵以低压,低损耗的方式在回路中输送,并且仅在自发增加接触压力时才需要激活。进一步有用的效果包括:原始抽象不完整。 <图像>

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