Is the throttle a carburetor? What is the purpose of the throttle?

1。 Throttle: A controllable valve used to control air entering the engine. After entering the intake manifold, it will be mixed with gasoline (different cars, different designs of mixed parts) to become combustible mixture, which will participate in combustion and work. Four-stroke gasoline engines are generally like this. 2。 With the use of throttle valve, the inhaled air inevitably contains fine dust and particles. In addition, at the end of the intake pipe and the last position of the throttle inlet, there is a setting of engine exhaust gas circulating and reburning, and oil and gas will be adsorbed inside the throttle valve, which is more likely to accumulate dust. When the dust accumulates to a certain extent, it needs to be cleaned up. (This is the answer to the third question) When the throttle is dirty, the thickness of the intake butterfly will increase, the edge will become irregular (this is in a microscopic situation), the intake will become disordered, and the idle position of the throttle will become unsatisfactory. If it deviates from the designed throttle opening, the idle speed will be unstable. Finally, the best way to avoid the dirty degree of the throttle is to install an oil breather, which can filter out the oil vapor and make the throttle dry. If there is a dust problem, always maintain the air filter, so that the air filter can be used for a long time to avoid dust being sucked into the throttle. After doing this, the quietness of the oil will also be improved.