42K views · 517 shares | What is variable valve lift? What is variable valve timing? We're going to look at the valvtrain from a 2009 Audi 2.0L I4 Turbo engine to check out the differences. Variable valve lift is used to enhance performance depending on the RPM and load, while variable valve timing is typically used for emissions control (lowering combustion temperatures and thus reducing NOx), but also has performance and efficiency benefits as well. | Engineering Explained | Facebook

Variable Valve Timing (VVT) systems advance or retard the timing of the engine's valves to optimize engine performance across different speeds and loads. Advancing VVT effectively opens the intake valves earlier, which can boost power at higher engine speeds. 111 ste Retarding VVT opens the intake valves later, which can improve fuel economy and reduce emissions at lower speeds. #vvt #mechanism #timing #mechanical #enginework #usaengine #usamechanic #usareels #ngkcoils #usaautomobile #IgnitionCo