Injini ye-D-VVT iwukuqhubeka nokuthuthukiswa kwe-VVT, ixazulula izinkinga zobuchwepheshe injini ye-VVT engakwazi ukuzinqoba.

I-DYYT imele i-Dual Variable Valve Timing. Kungashiwo ukuthi kuyindlela ethuthukisiwe yobuchwepheshe besistimu ye-valve eguquguqukayo yamanje.

Injini ye-DVVT iyinkampani entsha eqhudelana kakhulu ngokususelwa ekuthuthukisweni okuphelele kobuchwepheshe benjini ye-VVT. Isetshenziswe kumamodeli asezingeni eliphezulu njengeBMW 325DVVT. Nakuba isimiso senjini ye-DVVT sifana nesenjini ye-VVT, injini ye-VVT ingakwazi ukulungisa kuphela i-valve yokudonsa, kuyilapho injini ye-DVVT ikwazi ukulungisa ama-valve okudonsa nawokukhipha ngesikhathi esisodwa. I-Roewe 550 1.8LDVVT ingakwazi futhi ukuthola i-engeli ethile ngokuya ngesivinini senjini ehlukene. Isigaba se-valve yangaphakathi silungiseka ngendlela efanayo futhi sinezici ezinhle kakhulu zokuguquguquka okuphansi, i-torque ephezulu, ukuguquguquka okuphezulu namandla aphezulu.

Injini ye-D-VVT isebenzisa umgomo ofanayo enjinini ye-VVT, futhi isebenzisa isistimu yekhamera ye-hydraulic elula ukufeza imisebenzi yayo. Umehluko ukuthi injini ye-VVT ingakwazi ukulungisa i-valve yokudonsa kuphela, kuyilapho injini ye-D-VVT ikwazi ukulungisa ama-valve okungenisa nawokukhipha kanyekanye. Inezici ezinhle kakhulu zokuguquguquka okuphansi, i-torque ephezulu, ukuguquguquka okuphezulu namandla aphezulu. isikhundla esiholayo. Ngokwabantu abavamile, njengokuphefumula komuntu, ikhono lokulawula "ukukhipha umoya" kanye "nokudonsa umoya" ngesigqi njengoba kudingekile, yiqiniso, linokusebenza okuphezulu kunokulawula nje "ukuphefumula".