公开(公告)号：WO2014099385A1

公开(公告)日：2014-06-26

申请号：PCT/US2013/073219

申请日：2013-12-05

Applicant: BORGWARNER INC.

Inventor： MARKLEY, George, L. ,  BARRETTE, Simon ,  SMITH, Dale, N. ,  GOODSELL, Joseph, P.

IPC: F16H7/08 ,  F16H7/18

CPC classification number: F16H7/0848 ,  F16H7/08 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0859 ,  F16H2007/0878 ,  F16H2007/0885

Abstract: A tensioner comprising a piston slidably received within a piston bore of the housing having a plurality of grooves formed on an outer circumference, the piston forming a first pressure chamber with the piston bore. The tensioner uses a mechanism to remove a sliding pawl or expandable clip from engaging the grooves on the piston, such that the piston can move towards the housing and reduce chain load when fluid pressure is reduced in the first pressure chamber during engine shutdown, but not so much as to leave the chain uncontrolled during engine restart. The mechanism may for example be a fluid biased spool piston which engages the expandable clip or a pawl piston that engages a sliding pawl.

Abstract translation: 张紧器包括可滑动地容纳在所述壳体的活塞孔内的活塞，所述活塞孔具有形成在外周上的多个槽，所述活塞与所述活塞孔形成第一压力室。 张紧器使用机构来移除滑动爪或可膨胀夹与接合活塞上的凹槽，使得当发动机关闭期间流体压力在第一压力室中减小时，活塞可以向壳体移动并减少链条负载，但不 在发动机重新启动期间，使链条不受控制。 该机构可以例如是与可膨胀夹或接合滑动爪的棘爪活塞接合的流体偏压的卷轴活塞。