It's getting colder and colder. How long does it take to start the cold train in the morning?

When the weather becomes below zero, it is best to do a good job of hot car before departure. Generally, it can be started when the water thermometer moves, mainly to ensure that all kinds of hydraulic oil of the vehicle are not affected by the weather and affect its use.

In winter, the initial idle speed of cold car is relatively high, which usually drops to about 1000 10 second. You can start driving at this time, but don't drive violently at this time. Due to the low temperature in winter, the oil is very viscous after cooling overnight, which reduces the lubrication effect on the engine. At this time, intense driving will lead to the aggravation of engine wear, and at this time, we need to carry out what we often call hot car.

Many people know that vehicles should be warmed up after starting in winter, but there is usually a cognitive misunderstanding, that is, they are often warmed up at idle speed. In fact, this was realized a long time ago. Now the vehicle basically does not need to be preheated in place. On the contrary, if they warm up in situ, will they? It's harmful to our car. Because the vehicle idling in place will lead to slow heat diffusion, insufficient engine oil combustion, and a large amount of carbon deposition, which is very harmful to the automobile engine, it is not appropriate to idle in place to warm up.

So what should be done to achieve the purpose of hot car, without carbon deposition and engine damage? It's very simple, that is, after starting the car, wait until the idle speed of the car drops to about 65,438+0,000 rpm, so that the car can walk slowly at idle speed, so as not to make the engine oil burn insufficiently. At the same time, in the process of walking slowly, the engine can be warmed up in about 2 to 3 minutes, and the oil temperature in the engine also rises.

When the temperature of the water tank rises to a stable level, we can turn on the air conditioner and enjoy warm air washing. How pleasant it is to blow warm air in the car in this cold winter, but I personally don't recommend turning on warm air when the car is just driving, because it will lead to the loss of engine heat, which is not conducive to the preheating of the engine and some oil. And not only will you enjoy the warm air, but you will also delay the arrival time of the warm air.

With the improvement of vehicle-building technology, when you start the vehicle this season, you will find that the engine speed of the newly started vehicle will remain between 1600- 1900. This is because after the self-inspection, the computer controls fuel injection and air intake, so that the engine can quickly heat up at high speed to protect the engine from unnecessary wear, and at the same time, it cooperates with the carbon canister to absorb unburned fuel vapor, and finally sends the unburned fuel vapor into the engine combustion chamber for full combustion.

Therefore, after a few seconds in the morning, the engine speed drops to 1000 rpm, and gradually tends to be stable (at this time, the engine speed is still higher than the normal idle speed and remains at 1000 rpm), so you can shift into the first gear and drive slowly. At this time, if you see the engine water temperature rise to normal temperature, you can drive normally!

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.