一、VVT, also known as variable valve timing, is a technology used in piston engines.
At present, many engines produced by manufacturers have adopted VVT technology, which is also known as VVT engine.
It means that under specific conditions, by adjusting the advance and delay of the intake valve angle, the adjustment of the intake and exhaust volume and valve overlap angle is realized, and the intake impulse and efficiency are increased to obtain engine power, torque and other aspects. improve.
At present, the popular brands are Mercedes-Benz, BMW, Toyota and so on. The key factors related to VVT technology are: response speed, adjustment precision and adjustment stability.
Only when these three are matched with the structure and performance of the phaser and the control valve, can a better working state be achieved.

二、The role of VVT
①engine power output
②fuel economy
③exhaust pipe emissions
三、What will happen to the car if the VVT gear is broken?
①abnormal sound
②The vehicle will have unstable idling, poor acceleration, etc.
③Fuel consumption will greatly increase
④It will also cause some damage to the engine
Therefore, it is necessary to carry out maintenance in time to avoid accidents.