▁started . ▁The ▁so fter ▁outer ▁spring ▁only ▁acts ▁to ▁increase ▁the ▁problem atic ▁reson ance ▁frequency ▁range . ▁When ▁the ▁tor que ▁increases , ▁reaching ▁the ▁maximum ▁value , ▁the ▁internal ▁spring ▁also ▁acts . ▁In ▁this ▁second ▁phase , ▁the ▁inner ▁and ▁outer ▁spr ings ▁work ▁together . ▁The ▁collaboration ▁of ▁both ▁spr ings ▁thus ▁ens ures ▁good ▁ac oust ic ▁isol ation ▁at ▁all ▁engine ▁spe eds . ▁ ▁Three - phase ▁bent ▁spring ▁ ▁This ▁cur ved ▁spring ▁consists ▁of ▁an ▁outer ▁and ▁two ▁inner ▁spr ings ▁with ▁different ▁el astic ▁characteristics ▁connected ▁in ▁series . ▁This ▁category ▁of ▁bent ▁spring ▁uses ▁the ▁two ▁concepts ▁together : ▁parallel ▁and ▁series ▁connection ▁in ▁order ▁to ▁ensure ▁optimal ▁t ors ional ▁compens ation ▁for ▁each ▁value ▁of ▁tor que . ▁ ▁See ▁also ▁▁ ▁Cent rif ug al ▁p end ul um ▁absor ber ▁ ▁Cl utch ▁ ▁Fly w heel ▁ ▁Fly w heel ▁energy ▁storage ▁ ▁Harm onic ▁bal ancer ▁ ▁List ▁of ▁moments ▁of ▁in ert ia ▁ ▁References ▁ ▁External ▁links ▁▁▁▁ ▁dual - mass ▁fly w heel . ▁ ▁Category : F ly w he els ▁Category : Art icles ▁containing ▁video ▁cli ps ▁Category : Autom ot ive ▁engine ▁techn ologies <0x0A> </s> ▁May a ▁Val entin ov na ▁U so va ▁( , ▁born ▁ 2 2 ▁May ▁ 1 9 6 4 ) ▁is ▁a ▁Russian ▁former ▁ice ▁dan cer . ▁With ▁Alexander ▁Zh ul in , ▁she ▁is ▁a ▁two - time