Why should the car be warmed up when it starts, and why should the car be warmed up? How do you warm

In fact, the problem you mentioned must also be a problem that many car owners are confused about.

The answer I'm giving you is that you need to warm up your car and wait until the idle speed is back to normal before driving the car. The normal idle speed of the general vehicle is around 800 rpm. When the vehicle is first started in the cold, the idle speed will be between 1200 and 1500 rpm.

Because the vehicle has been stopped overnight, the oil is in the oil pan, and the high idle speed of cold start is first for the engine to start smoothly, and the second is for the oil pump to work fast, so that the oil can be quickly pumped from the oil pan to the various parts of the engine by the oil pump, lubricate the various parts, and reduce the wear and tear of the parts. On the other hand, if you start the car and drive, the oil has not yet lubricated the various parts of the engine, so driving immediately will cause the wear of the parts to accelerate and shorten the life of the parts.

And the automatic transmission of the vehicle is also based on this principle. And when the idle speed returns to normal, the oil temperature of the transmission has risen, and the automatic transmission can reach the operating temperature faster.

As a reminder, the hot car referred to here is the idle speed that returns to normal idling, not the hot car that some people think of as the water temperature rises.

Personally, it is not recommended to wait for the water temperature to come up before driving such a hot car.

The engine needs to be lubricated, and the lubricating oil will flow back into the oil pan after a long period of standing, so it is necessary to idle the work first, so that the lubricating oil can fully lubricate all the parts that need to be lubricated and then work under load, which is conducive to prolonging the life of the engine.

Of course, the gap between the various parts of a cold and hot car is also different.

The engine work needs lubrication, so that the lubricating oil can fully lubricate all the parts that need to be lubricated, and then increase the load, which is conducive to prolonging the life of the engine.

Do I need to warm up the engine before the car starts?

What are the benefits of a train for a car when it starts? Most people believe that when you need to use the car early in the morning, it is most beneficial for the car to idle the train in place after starting the car and wait for 3 to 5 minutes to operate normally. But are you sure this is the right way to warm up the car?

According to one statistic, more than 90% of partial damage to engine components occurs within 3 minutes of cold start. So, how can we do a good regional train, I believe this is a question that all car enthusiasts are concerned about. But before we go into detail about the train method, let's understand why exactly a car has to take a train.

You need to know the reason for the train to train normally. After a long shutdown of the first car, the oil in the engine flows back into the oil pan in the lower part of the engine. Therefore, when the engine is started after the car is not used for a long time, the upper part of the engine is in a situation where there is no oil and insufficient lubrication.

It takes about 30 seconds after starting to deliver the engine oil to the piston rod, crankshaft, engine crankshaft and other parts of the engine that need lubrication the most. However, if the engine starts normally as soon as it starts, if you don't force the fuel truck and keep it running at low speed, the actual effect may be the same as running at idle speed.

The oil system software provided before the engine reaches the operating temperature is still low, and it is not possible to properly vaporize the car's gasoline. Gasoline used in cars does not vaporize, it is a "wet click" liquid, and it is difficult to ignite, so start the engine. We now need to use the effect of the windshield to prevent some of the gas from entering the cylinder, increase the mixing cost of gasoline gas for vehicles, increase the engine speed, so that the engine does not stall.

Once all normal operating temperatures have been reached, the fully automatic windshield will naturally recover due to the posture of the mechanical equipment.

The lubrication of the transmission gears of the related transmission is actually the most incomprehensible and easy to ignore by ordinary people. The gearbox oil flows to the same area as the engine oil, and in the case of a cold car, the oil flows to the lower half of the gearbox. Only when driving, due to the operation of the electric gear, can oil from the bottom be brought to lubricate the top.

That's why most vehicles are astringent when changing gears on a cold car. Nor can it be disposed of by train in situ. The gearbox does not have a gear pump, so the in-place train can only move the engine, and some of them do not move, so the situation can only be improved by gradually driving from the facts.

Idling a train in place is really not necessary. Because the actual effect is relatively limited, it is a luxury to waste car gasoline and time (plus air pollution). In addition, when the engine is idling at an idle speed, there is a case that carbon accumulates in automobile gasoline due to high temperatures, which can further damage the engine.

The correct train method of the car should start normally 30 seconds to 1 minute after starting, and the train time can be appropriately increased in low temperature areas. When the car is just started, it is absolutely not to spin the car at high speed, it must be kept low and the engine speed should not exceed 3000 3500 rpm. That generally stays at 2000 rpm, otherwise the engine and transmission suffer considerable losses.

Preheating is to warm up the car, one is to make the lubricating oil fully work, the other is to increase the working temperature of the engine, reduce the loss of the car. Start the car for 30 seconds and then start to achieve the effect of hot car.

Hello, nice to meet you. I'm Xiaomo, an auto repair consultant. With 15 years of experience in automobile maintenance, he is currently working in FAW-Volkswagen, one of the world's top 500 state-owned enterprises, with a senior certificate for automobile maintenance and a certificate for auto beauty technicians, and is familiar with the detailed configuration of major brands of vehicles, and has provided comprehensive automobile repair and maintenance consulting for tens of thousands of customers.

We are typing the answer by hand, so please be patient for a while. I'll give you a solution in a few minutes, thanks! ❤️

It is best to preheat and then start the car needs to be warmed up, because the temperature of the engine that has just started is low, and the lubricating oil in each part is not in place. The warm-up time does not need to be too long, ask questions.

My car is starting, and the sound is very loud during the start in the morning, as if the oil can't keep up, the sound is loud and small, and my car didn't need to be warmed up before.

Now the car can't go without warming up.

I feel like the car still costs gas.

Mine is a BMW 2 Series 218i

Seven-seater car. Your situation is no longer a warm-up issue.

Caused by an over-dilute engine mixture.

Questions. The warm-up is good, and the normal driving does not feel different.

It is normal for you to warm up, but if you don't warm up, there will be a lot of noise, and the waste oil should be caused by a loose throttle gap.

The gap needs to be adjusted to allow the mixture to mix.

The preheating of the car is to let the engine get used to it, so that it will not work without starting to use it, which will damage the engine. Generally, it takes 10 minutes to insert the key.

Today's cars basically don't need to be preheated, don't rush to the gas pedal when the car is cold, but compared to the early cars still have to be preheated, the general car can be preheated for 3 or 5 minutes.

Need a hot car. Reason:

After starting the car, leave the car idling for about a minute. Due to the long-term stationary state of the car, the oil in the engine of the car will slowly stop to the bottom of the engine, so there is no oil lubrication between the parts in the engine of the car.

Tips for hot cars:

After starting the car, you will find that the speed of the car is around 1200 rpm, and about a minute after the car starts, the speed of the car will drop to about 800 rpm, and then the hot car is completed. How long does it take to warm up the car before driving, and the car can drive when this signal appears, otherwise it will increase the carbon deposit of the engine, which will destroy the car more than the car that is not hot.

<><1. Why do I need to warm up the car to start?

1) Nowadays, most cars use electronically controlled gasoline injection system, and the working principle of the EFI system is to accurately control the amount of fuel injection through computer control, which can ensure a good atomization effect. The speed can be stabilized in a very short time after starting, and the outside temperature has little effect on it. For today's EFI vehicles, we don't need to "heat up in situ for a long time" like carburetor cars in the past.

Now the EFI truck also needs to be hot, but the time is shorter, mainly to ensure that the parts do not work vigorously before the oil returns.

Due to the long period of parking of the car, most of the oil inside the engine will flow back into the oil pan. When the cold car starts, the oil cannot reach the surface of each part in time, forming an effective oil film on its surface. If you hit the road as soon as you start the vehicle, it will exacerbate engine wear.

2) Before the engine reaches the operating temperature, its oil supply system cannot effectively vaporize the gasoline completely due to the low temperature (the liquid temperature rises to the boiling point, and the gasification is quickly defeated). The best working temperature of the engine is between 80-90 degrees, at this temperature, the gap between the various parts of the engine is the best, the oil temperature of the lubricating oil is the most conducive to flow, the work efficiency is the highest, the fuel consumption is the lowest, and the output power is the largest.

2. How long is the right time to warm up?

The correct way to warm up the car should be to start 30 seconds to one minute after the car is on the road - the hot car can be appropriately extended in low temperature areas. The car should not be driven at high rpm when it is just started, and should be kept at a low speed, and the engine speed should not exceed 3000 3500 rpm. Generally, keep 2000 rpm per acre, otherwise the damage to the engine and gearbox is great.