Matut manoi galai shai ai valve timing system ngu nna mung shamying ai mawdaw engine ni a valve aten ladaw hpe galai shai ai ladat gaw, dai ni na mawdaw hpaji masa hta ahkyak ai hpaji masa langai rai nga ai.
1. Ndai system hpe tsaw ai-}performance engine ni hta grai lang wa sai. Hpaji rawng ai hkang zing ai hte galaw sa wa ai ladat hku nna, engine a phase (sh) valve lift hpe gram lajang nna, engine a valve timing process hpe grau kaja hkra galaw lu ai.
2. Valve a aten masa gaw, engine a sut masa hte n-gun atsam hpe grai hkra machyi shangun ai. Lawan ai hku lawan ai hku, intake inertia hpe tup hkrak jai lang ai hku nna, intake volume hte efficiency hpe jat mai ai majaw, valve gaw aten dep hpaw nna, hpang de hpaw wa ai; n-gun n law ai aten hta, masa gaw dai hte nhtan shai ai lam sha rai nga ai. Ya aten hta, dai ni na engine law malawng gaw ndai hpaji hpe lang ma ai.
3. Piston langai a matu mali-stroke engine a matu, n-gun n-gun mali lang, n-gun n-gun, n-gun hte n-gun n-gun n-gun n-gun n-gun mali gaw ahkyak dik rai nga ai. Dai ni hta, valve hpaw ai℃a majaw engine lu sha ai lam hpe gara hku hkra machyi shangun ai hpe laksan myit maju jung ga ai. Cylinder lu sha ai lam a madung npawt tara gaw "negative pressure", ngu ai gaw, cylinder kata hte shinggan na gas n-gun shai hkat ai lam rai nga ai. Engine a kata hte shinggan na n-gun n-gun hpe koi lu na matu, engine hpe n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun yawm mat ai hpe koi lu na matu, n-gun n-gun yawm mat ai hte n-gun n-rawng ai lam ni hpe shayawm ya lu ai, valve a hpaw ai℃hpe hkrak hkrak hkang lu ra ai, law malawng gaw stroke ladat kadun hpe lang ra ai; lawan ai hku gat ai shaloi, engine hpe atsawm sha sha lu na matu, grau kaba ai valve lift ra ai.
4. Engine a torque arawn alai ni hpe n-gun n law ai sha, lawan ai hku engine a n-gun atsam atsam ni hpe rap ra hkra galaw ai hta engineer ni hkrum sha nga ai mayak mahkak ni hpe hparan lu na matu, valve timing hpaji masa hpe galai shai ai hpaji masa ni byin pru wa ai. Ndai hpaji masa gaw, engine a bungli galaw ai masa hte maren, valve lift hpe n-gun n-gun hte galai shai ya lu ai, dai hku nna, lawan ai hte n-gun kaba ai hta torque law ai hpe lawan ai hku galaw ya lu ai.