Nissan's No Throttle Engine - How VVEL Works

Why Some Nissan Engines Do Not Need A Throttle Body - VVEL How VVEL Works - Variable Valve Event & Lift VVEL (Variable Valve Event & Lift) is Nissan&valve system capable of operating an engine at any RPM with the throttle wide open. The throttle does exist for as a safety back-up incase any systems fail, and also has other minor uses, however the engine can operate without it&use at any load, and any RPM. This is done by varying how much the intake valves open during the intake stroke. For low load/RPM use, there are less pumping losses as the piston does not have to fill the intake manifold with a vacuum to draw in air. Atmospheric pressure is available right outside the intake valve. For mid load/RPM, response is immediate as you don&have to wait for the atmospheric pressure to travel through the intake manifold. For high load/RPM, you can open the valves as much as the design allows, giving you more power and torque versus single cam engines which cannot vary valve lift. Don&forget to check out my other pages below! NEW VIDEO EVERY WEDNESDAY!