The cold car starts to shake and will stall.

The reason for carbon deposition is that the cold car began to shake and suddenly stopped.

The reason of carbon deposition is the shaking and flameout of the car during cold start. Carbon deposition generally appears on the inner wall of throttle valve, intake valve head, intake port, piston top and combustion chamber. Excessive carbon deposition will cause insufficient air intake, difficult starting or easy flameout at idle speed.

After the water temperature reaches the normal working temperature of the engine, the idle speed rises and falls due to the excessive opening of the throttle valve exceeding the normal idle speed value, and the computer repeatedly adjusts the position of the throttle valve plate. In fact, it is not only the throttle valve that is the easiest to deposit carbon, but also the head of the intake valve (the end of the intake port).

What's more, if there is too much carbon in the head of the intake valve, the valve will not be closed tightly, which will make the cold start more difficult. Even if it can be barely started, it will be closed soon. Moreover, with the increase of engine temperature, the fuel in the carbon deposit evaporates and is sucked into the cylinder to participate in combustion. This part of the fuel is out of control, resulting in a rich mixture.

Automobile introduction

China's latest national standard "Terms and Definitions of Automobile and Trailer Types" (GB/T 3730. 1—2006.5438+0) defines an automobile as a vehicle with four or more wheels driven by power, which is mainly used for carrying people and/or goods; Towing vehicles carrying people and/or goods; Special purpose.

Domestic automobile brands include: Du Ji, Wuling, Baojun, Hongqi, Chang 'an, Great Wall, Chery, Geely, Roewe, BYD, Weilai, Xpeng Automobile and Dongfeng. Foreign automobile brands include: Toyota, Volkswagen, Audi, Mercedes-Benz, Hyundai, Kia, Peugeot, Cadillac, Nissan and so on.