可变滚子摇臂技术.doc

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1、SwitchableRollerFingerFollower(RFF)Ansinglepiece'1RFFcooperateswithhighliftcamandlowliftornoliftcams.Thelashadjustmentiseithermechanicalorhydraulic.Atafirstpositionofanexternalcontrolmember,thecammingactionfromthehighliftcamistransferred,viaaroller,totheRFFprovidingahighvalveliftprofil

2、e.AtasecondpositionoftheexternalcontrolmemberthehighliftcamisdisengagedfromtheRFFwhichisactuatedbythelowlift(orthenolift)camstoprovidealowvalveliftprofile(orvalvedeactivation).TheRFFisstrong,simple,lightandspaceeffective:nooilpassages,nolockingpinscarriedbytheRFF,noadditionalsprings,no

3、idleparts.Thecylinderheadremainsuntouched.Thetransitionfrommodetomodeinvolvesnoimpact:itcouldlastafewcycles,ifdesirable.Morethantwomodesofoperationarepossible・Easytoinstallasretrofitonexistingengines.VariousViewPointsAnimation12MBDualModeRFFExplodedAnimation12MBDualMode+DeactivationAni

4、mation1.1MB