How often should the car throttle be cleaned?

Throttle, I believe everyone is familiar with it. Many cars will encounter the need to clean the throttle when doing maintenance. So how often should the car throttle be cleaned?

The cleaning frequency of throttle valve is usually divided into the following three situations:

If you often encounter traffic jams, and the local dust is serious or often cross-country, it is recommended to drive 20,000 kilometers to clean it.

The idle speed and fuel consumption of the car are stable, and there is no need to clean the throttle when driving for 30,000 kilometers.

If the driving environment is good and there is no idling jitter, it is ok to clean it for 50 thousand kilometers.

Why is there carbon deposit on the throttle?

The air filter is too dirty to filter completely. Throttle is the valve that controls the intake of the engine, because its top is connected with the air cleaner and its bottom is connected with the intake pipe of the engine. Although there is air filtration, if the time is long, the air filtration is dirty, resulting in incomplete filtration, and impurities in the air attach to oily places to form carbon mud.

Insufficient combustion of gasoline will produce low-temperature sludge. When the car is driving at a low speed, the engine has a large amount of fuel injection, but the crankcase temperature is low, and the low-temperature sludge will be produced when the gasoline that is not fully burned enters the crankcase.