I-VVT sisishunqulelo sesiNgesi seValve Valve Timing. Isikhundla se-cam ye-camshaft ye-injini yendabuko ilungisiwe, ihambelana nesigaba se-injini ye-crankshaft, oko kukuthi, i-angle yokuvula kunye nokuvala (ixesha) phakathi kwevalve yokungena kunye ne-valve yokukhupha ayitshintshi.

Ke, okona kulungileyo Kunzima ukufezekisa eyona ntsebenzo yesantya esiphezulu ngexesha elinye kunye nesantya esisezantsi sevalve yexesha ", oko kukuthi, akunakwenzeka ukulungelelanisa iimfuno zozinzo lwesantya esingasebenziyo, ukuphuma kwetorque enesantya esisezantsi. kunye nemveliso enesantya esiphezulu. Ukuze kulungiswe iimfuno ezahlukeneyo ze-injini ye-valve yexesha kwisantya esiphezulu kunye nesantya esisezantsi, inkqubo ye-valve ye-valve (VVT) yamkelwa. I-actuator ye-hydraulic (VVT phaser) ifakwe kwi-front end ye-camshaft, kwaye uxinzelelo lwe-hydraulic lulawulwa ngekhompyutha. Iindlela zokutshintsha isigaba se-camshaft ngokubhekiselele kwi-crankshaft ukuqhubela phambili okanye ukubuyisela ixesha levalve. Indibano yeVVT yephaseji kunye necamshaft iboniswe kumzobo ongezantsi.

Okwangoku, iinjini ezininzi zepetroli zixhotyiswe ngeentlobo ezahlukeneyo zeenkqubo zeVVT. Ngokukodwa kwiinjini ezinemigangatho ephezulu yokukhutshwa, zixhotyiswe ngeendlela ezimbini zeVVT (i-camshafts yokungena kunye nokukhupha ifakwe i-VVT phasers). Ngapha koko, inkqubo ye-VVT ihlangabezana neemfuno zeemeko ezahlukeneyo zokusebenza kwaye ifezekisa izikhombisi zobugcisa ezihambelanayo ngokutshintsha i-valve overlap angle. Ngokubanzi, inezi nzuzo zilandelayo:

(1) Isigaba sokuthatha kunye nokukhupha i-camshafts sinokuhlengahlengiswa, esinokunyuswa ngommiselo. Ivalve overlap angle yonyusa umoya we-injini.

(2) Ukunciphisa i-coefficient yegesi yokukhupha intsalela kunye nokuphucula ukusebenza kakuhle kokutshaja.

(3) Ukuphucula amandla e-injini kunye ne-torque, kunye nokuphucula ngokufanelekileyo uqoqosho lwamafutha.

(4) Ngokucacileyo uphucula ukuzinza kwesantya sokungenzi nto, ngaloo ndlela ufumana intuthuzelo kunye nokunciphisa ukukhutshwa.