What does the VVT engine of a car stand for?

Variable valve timing (VVT) is a technology used in automobile piston engine. VVT technology can adjust the overlapping time and timing of engine intake and exhaust system (part or all), reduce fuel consumption and improve efficiency.

199 1 year, Clemson university invented and patented a more advanced continuously variable valve timing of intake and exhaust valves.

(American Society of Mechanical Engineers, clemson Camshaft Improving Automobile Fuel Economy, Mechanical Engineering-CIME (1991-12-01)),

After that, BMW Motor Company and the mechanical department of the school became close partners. 1995 Honda, the main partner of the British Rover Automobile Group, invented another continuously variable valve timing technology, VVC.

Extended data:

Toyota's VVT-I system can continuously adjust the valve timing, but it cannot adjust the valve lift. Its working principle is that when the engine changes from low speed to high speed, the electronic computer will automatically press the oil to the small turbine in the driving gear of the intake camshaft.

In this way, under the action of pressure, the small turbine rotates at a certain angle relative to the gearbox, so that the camshaft rotates forward or backward within 60 degrees, thus changing the opening time of the intake valve and achieving the purpose of continuously adjusting the valve timing.