Warm up in winter below minus 30 degrees Celsius.

Misleading.!Proper preheating allows the engine to be fully lubricated and run well.

When the engine is stopped for a long time, the oil will flow back to the bottom under the action of gravity. It takes time for the oil pump to lubricate the entire component.

At low temperatures (sub-zero), the fluidity of the oil is affected. Proper heating is required.

Above 20 degrees, there is basically no need to preheat.

0--20 degrees, about 30 seconds.

When the temperature is below 0 degrees, warm up for about 60 seconds.

When it is less than -5 degrees Celsius. Preheat for 2 minutes.

European cars generally require a start after starting.

Korean cars are generally required to wait for the revs to stabilize at about 1,000 before starting.

Japanese cars generally require that they start as soon as the revs reach a stable level, which is a bit vague, so Nissan, for example, says that it is necessary to wait at least 30s after starting, especially in cold winters.

1.Spring, summer, and autumn are not killed in situ to heat the car.

2.Whether the car is heated in situ in winter is based on the outside temperature of the car.

a.0 degrees or more Do not heat the car in situ, and start as soon as the idle speed is stable after landing.

The car parked in the basement is really happy, the low temperature is not excessive, I definitely do not heat the car in situ, not only make the basement air very poor, but also waste time, waste gasoline, affect the health of the security guards.

b.Below 0 degrees, take an ultra-short period of in-situ hot car.

The time is about half a minute, but time is not the key factor, the key is to see the first drop in idle speed after stabilization, take my Xiaofu as an example, the idle speed after 0 time is 1200, and it drops to about 1100 after about half a minute, at this time I will set off immediately, and the main reason for waiting for half a minute is that the engine noise will be reduced a lot, otherwise it sounds a little distressing.

How to warm up the car? The engine runs smoothly, not until the basic idle speed, but when there is no cylinder shortage, shaking, and normal oil pressure.

All the experts who say that the water temperature scale indicates the normal temperature, do you know how long it takes to get on the car in place to reach this condition? Is 30 minutes enough when the outside temperature is minus 5 degrees Celsius? How long does it take for a high idle to go to a normal idle? Some buses take more than 20 minutes.

There are several disadvantages to hot cars on the spot:

High fuel consumption, obvious!

It is easy to have carbon deposition in spark plugs and poor cold start.

The wear of the engine has not decreased: the wear is related to the number of revolutions of the engine, based on an average of 1,000 revolutions per minute, 300,000 revolutions in 30 minutes; The hot car is calculated in 10 minutes and the average speed is 2,000 rpm, and the engine rotates 200,000 rpm; (and has walked more than 5 kilometers).

Therefore, it is not advisable to heat up the car on the spot. Not to mention the issue of emissions!

At such temperatures, your method is of little help. You should warm up half an hour before your trip each day.

I definitely have to add antifreeze.

It takes about 2-3 minutes to warm up the train in the morning. Depending on the local temperature conditions, the hot car will be hot. In the northeast, it is better to warm up for 2-3 minutes, and it is better to warm up for 1-2 minutes below zero, in the south.

There is no sub-zero, and the hot car is 30 seconds to 1 minute.

The engine itself is a heat engine.

Because mechanical parts have thermal expansion and contraction.

The water temperature is 90 degrees Celsius and is designed for optimal fitting clearance.

Qingyu is not in the best state because of the shrinkage of the parts. Therefore, the hot car is also waiting for the piston, piston ring and other components to be heated and expand to the best state. After the fire in the morning, the engine itself will have a high idle speed.

The process at which point the mixture is thickened and the speed of the hot car is increased.

Warm up the car, not at the time, but at the temperature.

Need a hot car.

When driving in severe cold weather, the engine is most affected, because the oil in the engine will lose its activity and become viscous when the temperature is low, and it is difficult for the oil in this state to play a lubricating role.

If you start directly and leave, the engine will not be lubricated by oil, which will affect the normal use of the engine. In severe cold weather, if the car is not hot, it will cause the engine to pull the cylinder, so it is very necessary to drive a hot car in winter.

Starting the car at more than minus 20 degrees, this must need to be hot! And you need to heat up the car in situ! If the minimum ambient temperature is only about 0 degrees, it is actually completely unnecessary to heat the car in situ, and many car user manuals also have requirements:

As soon as the car starts, it should drive at a low speed. Generally speaking, when it is more than minus 20 degrees, it is recommended to start the car and idle it for 1-2 minutes, and use this time to clear the snow and smoke a cigarette. Raise the engine temperature slightly and the oil to the operating temperature.

Then drive at a low speed, and wait until the water temperature light goes out or the water temperature gauge needle moves slightly, indicating that the water temperature has reached 40, and then you can drive normally. ‍‍

Hot car is still very necessary, of course, I don't mean that in any case you need to heat the car, and you don't need to warm up the car for a long time, according to the problem, minus 20 degrees is definitely the need to heat the car and then go, if it is normal temperature weather, then you can idle in situ for about 30s, and then drive normally for a distance, and then hit the throttle on the throttle, then it's not a thing. ‍‍

In the past, older vehicles need to heat up the car, this is a thing that everyone knows, some old drivers need to heat up the car for several minutes, and then later, as the vehicle manufacturing technology is more and more advanced, there is a new saying, the current vehicle no longer needs to heat the car, directly start the vehicle and step on the accelerator to go. But in fact, today's vehicles still need to be hot, especially in extremely low temperature environments, and hot cars are very necessary. Because although as long as you choose the engine oil with a high antifreeze index, you can start the vehicle normally in a low temperature environment, but the low temperature will make the oil thicker, we still need to wait for the oil to reach the surface of each part of the engine and return to a relatively smooth flow state before driving normally. ‍‍

Yes, the main reason is that the oil in the engine can be fully lubricated, and the oil in the engine flows back into the oil pan at the bottom of the engine after the car is parked for a long time.

The car was put overnight, the oil existed in the oil pan, the concentration of cold engine oil increased, the fluency in the pipeline was poor when the cold car was working, and the gas connecting rod and cylinder wall on the high position of the engine could not be lubricated immediately. In order to make the engine have a good working temperature, it is necessary to warm up the car every morning when we drive (whether you are in the north or in the south). There is no need for textbook-style details, it is simple and easy to understand, as long as it is helpful to riders.

Finally, this rider mentioned the question of whether it is necessary to warm up at minus 20 degrees, and it is even more necessary to preheat the car in the north, the car is its own, don't fool the pseudo-experts. ‍‍

You definitely need to warm up the car, if it is really minus 20 degrees, then you must warm up the car to go. Many people should have heard that some car owners need to warm up the car for a few minutes before driving, whether it is in the hot weather of more than minus 10 degrees or more than 20 degrees, you can often see the owner start the car, sit quietly in the car and wait for a few minutes. In the past, when carburetors were used, the carburetor used the kinetic energy of the inhaled air stream to atomize the gasoline, and then injected the mixed compressed gasoline and air into the combustion chamber.

Therefore, when the temperature is very low in winter, the oxygen content is relatively low, and the carburetor cannot be injected normally. But don't think that now that car technology has developed rapidly, cars don't need to be hot, when the temperature is low, you can try to start the accelerator directly and go, you will find that the engine sounds like a tractor roaring. And if you don't start the car hot, then the shift is not very difficult, especially in the case of low temperatures, the jerky shift of the cold car is because the gear oil flows to the lower half of the gearbox in the cold car state, and the transmission gear is not fully lubricated. ‍‍

In winter, you should pay attention to the number of engine oil added to your vehicle, and how low temperature the environment can work. The number of the engine oil is generally a number plus w, followed by a number, such as 5w-40, the number before this w minus 35 represents the low temperature working temperature of the oil, 5w means that the oil can protect the normal start of the vehicle in an environment of minus 30 degrees. Secondly, the vehicle also needs the water temperature to reach the operating temperature to fully vaporize the fuel before it can run properly, and the water temperature will rise more slowly in winter when the temperature is lower than in other seasons.

For these reasons, not only do you need to warm up your car in the cooler winter months, but you also need to warm it up for a longer time than usual. However, it does not mean that you must idle in place for three or five minutes before walking, but it is slightly longer than usual, about 1 minute, the speed of the vehicle drops, you can drive at low speed, do not vigorously increase the accelerator, and wait for the water temperature to rise, almost 60 degrees or more, the whole hot car process is really over. ‍‍

In fact, this is a very controversial issue, some people think it is needed, some people think it is not needed, after all, it is no longer the era of carburetors, there is no need to heat up the car, just start the accelerator. And I am another part of the people, I personally think that it is necessary to warm up the car, only when the engine reaches normal idling, can it work normally, especially in the case of dozens of degrees below zero, the water temperature has not come up and directly hit the throttle, have you not tried to turn off? Some riders say so, do not heat the car directly, the wear and tear of the engine is the greatest, even if the hot car is a little longer, if the carbon deposition and the cylinder burning oil you choose, of course, it is carbon deposition, and the carbon deposition can be solved, but the cylinder and the oil will be more than worth the loss. ‍‍

In my experience of living in the Northeast for many years, the highest level of a hot car is that the car is hot, the engine is worn out as little as possible, and the fuel consumption is less! Generally, I follow the following procedures: 1. After taking the car, don't go immediately, look at the tachometer, and the idle speed is more than 1,000 revolutions at minus 10 degrees.

At this time, all you have to do is heat up the seat, freeze in the car, and look at the tachometer pointer! When the pointer fell below 1,000 revolutions, he immediately drove away with lightning speed, it was really cold! This period is not too long, usually within a minute.

2. After hitting the road, don't be in a hurry, and the engine speed should not exceed 2,000 rpm. The voice of more than two thousand ** motives was extremely ugly, and it was as if she couldn't keep up. When the water temperature gauge is almost halfway through, you can refuel and drive quickly, at this time the water temperature of the water tank is actually more than 70 degrees, although the display is not so high.

But you should note that the second half of the water temperature gauge rises much faster than the first half. This distance is not too far, usually about two kilometers, if the water temperature is slow, it is recommended that you go to the repair shop to check. (except for diesel vehicles) 3. When the water temperature comes up, then you can open it if you want to! ‍‍

Of course, you need a hot car, and you need to warm up the car in situ, if you are a local tyrant, you can not be hot haha.

The best time to warm up in the morning is about a minute, too long time can easily lead to increased fuel consumption, you can wait for the speed to stabilize, hang up the gear and drive slowly, so that you can also heat up the transmission.

minus 20 degrees, sending my wife to work for fear that she would be cold can only be hot in situ for ten minutes. If the water temperature can't climb the second grid, start walking, traffic jam idling water temperature rises slowly, the water temperature falls down when the warm air comes to the warm air, and the warm air glass is frosty, which is really a headache!

Now they are all EFI cars, and it doesn't take too long to heat up the car in situ, as long as the idle speed drops to about 700 rpm, you can go, but you have to drive slowly for a distance of 30 kilometers, and then drive normally after the water temperature gauge hand moves.

As long as you start half a minute after driving, you can drive.

In the low temperature environment in winter, 1 minute of in-situ hot car is sufficient. The best way to warm up the car in winter is to drive at a low speed and constant speed as much as possible after starting, keep the speed within 2000 rpm, and wait for the water temperature to reach nearly 60 or more to drive normally.

The main reason for a hot car is that after the car is parked for a long time, the oil in the engine flows back into the oil pan in the lower part of the engine. Therefore, after ignition, the upper part of the engine is in a state of lack of lubrication without oil, and it is about 30 seconds after starting that the oil pump will be used to transport the oil to the pistons, connecting rods and crankshafts that need to be lubricated most in the engine.

In winter, when the temperature is not so low, it generally only takes one or two minutes to heat the car in situ for a minute or two, and then you can start the vehicle to maintain a low speed, and you can drive normally after the temperature comes up.

More than minus 20 degrees, it is necessary to heat the car in situ for at least five minutes, or longer, because the lubricating oil is too viscous and starts in a short time, which is likely to cause gear damage.