It's very cold. Do you need a hot car to run at high speed? How should you heat the car?

The basic knowledge of these official instructions is that there is no need to stop preheating after the engine is started. Drive at a low speed and drive normally after the engine temperature is normal! Therefore, for a new generation of cars, the correct way to warm up is to run slowly after starting, instead of idling in place. In-situ idling hot car consumes oil and its emissions deteriorate, which has no protective effect on the car. Many people leave immediately after winter begins. They have some problems and are worried about damaging the vehicle. This is because I am worried that the oil lubrication is not in place, resulting in abnormal engine wear.

We should know clearly why cars are hot. Whether in summer or winter, the viscosity of engine oil will increase after the vehicle is parked overnight. If the vehicle is started immediately after a cold start, engine wear will increase, especially in winter. What links should I pay attention to when the hot car is hot? Don't warm up the car for a long time. Old drivers will get used to hot cars in the same place, but the time should not be too long, otherwise it will increase fuel consumption. Hot car time. The preheating time should be selected according to different temperatures, vehicles and environments. Winter is usually longer than summer. For example, if the temperature is low, it usually takes about 3 minutes to warm the car; If it is snowy, the warm-up time should also be extended, and it is best to snow after the engine compartment melts.

You can try driving at a low speed. After driving on the road, don't increase the throttle to accelerate, let the vehicle slow down by about 1 km, and basically achieve the purpose of hot car. Observe the water thermometer. Generally, the pointer of the water thermometer reaches one third of the temperature scale, which proves that the water temperature basically reaches about 60 degrees at this time, and the hot car is basically completed, which can speed up the road. If the water temperature rises, check whether the rpm of the idling meter drops. If the idle speed drops by about 800 revolutions, the hot car is basically completed. Actually, there is no need to worry. After the engine is started, the oil pump driven by the engine has begun to pump the oil from the oil pan, and then it is filtered and sent to all parts that need lubrication.

Before the engine reaches the working temperature, because the temperature is still very low, its oil supply system can not effectively vaporize gasoline completely. It takes 7 to 10 minutes for a cold engine to reach its normal operating temperature, which varies according to different ambient temperatures. In the meantime, there is no need to preheat the car in situ, as long as it does not drive at high speed. Hot cars are not only bad, but actually do some damage to vehicles. That is to say, if we move together, the oil will work normally in a few seconds. If we idle there for a minute or two, it will not help the engine lubrication. On the premise that in-situ idling is not helpful to the engine, in-situ idling will heat up the fuel. Hot car problem, especially hot car in winter, is a hot topic on the Internet, and it has also aroused widespread concern of the majority of car owners. However, the answers of different opinions sometimes make people not know the truth.