公开(公告)号：EP2113057A1

公开(公告)日：2009-11-04

申请号：EP08709597.2

申请日：2008-02-07

申请人： TOROTRAK (DEVELOPMENT) LIMITED

发明人： DONOHOE, Brian ,  WINTER, Philip Duncan ,  FULLER, John William Edward

IPC分类号： F16H61/664

CPC分类号： F16H61/6649 ,  F16H15/38 ,  F16H37/086 ,  F16H61/6648

摘要： The invention concerns an arrangement for control of a continuously variable transmission. The transmission includes a variator (10) having a movable torque transfer part (rollers 18) whose position corresponds to a variator drive ratio. A hydraulic actuator (28) is arranged to exert an adjustable force on the torque transfer part. The transmission further comprises a flow control arrangement which is arranged to receive as control inputs (a) the current position of the torque transfer part and (b) a demanded position for it. The demanded position may for example be determined by driver input. The flow control arrangement is adapted to supply through a s upply o utlet w hich c omniunicates w ith t he h ydraulic actuator a flow of fluid which is modulated in accordance with an error between the two control inputs. The flow of fluid increases with increasing error. A relief passage (110) leads from the said outlet to a pressure sink and is constricted so that fluid flow through it results in a p ressure at the hydraulic a ctuator which is g reater than that of the sink by an amount which corresponds to the rate of flow through the relief passage. The result is a mode of control of the transmission which possesses some of the advantages of both torque and ratio control.

摘要翻译： 本发明涉及一种用于控制无级变速器的装置。 变速器包括变速器（10），该变速器具有位置对应于变速器传动比的可动转矩传递部（辊18）。 液压致动器（28）布置成在扭矩传递部件上施加可调整的力。 变速器还包括流量控制装置，该流量控制装置布置成接收（a）扭矩传递部件的当前位置和（b）它的所需位置作为控制输入。 要求的位置可以例如由驾驶员输入来确定。 流量控制装置适用于通过供液泵供应流体，该流体通过与液压致动器通信的流体流动根据两个控制输入之间的误差进行调节。 流体的流量随着误差的增加而增加。 一个泄压通道（110）从所述出口通向一个压力槽并被收缩，使得通过它的流体流动导致在液压密封器处产生一个比水槽的液压密封器更大的量， 通过泄压通道的流量。 其结果是变速器的控制模式，其具有扭矩和比率控制的一些优点。