Why can t the hot train take too long?

You need to warm up your car before driving in winter, but it doesn't mean that the longer the better, for the following reasons.

First: damage to the engine, in situ hot car but not driving, is equivalent to letting the engine do useless work in situ, the temperature continues to rise, this harm is not small, in addition to carbon deposit. It's all counterproductive to the engine.

Second: fuel consumption, the fuel consumption of the in-situ hot car is very high, much higher than the fuel consumption of the car really running, if every time you drive in a winter is to heat up the car for a long time, then the fuel consumption can support the car to run dozens of kilometers. It's still pretty scary to count.

Third: Waste of time: It is not the right thing to do for a long time to warm up the car, and it is a waste of time on this, so whether it is going to work or school, you are going to set off, but you have to wait in place for so long, it is maddening to think about it.

Fourth, polluting the air, too long time in situ hot car is equivalent to meaningless emissions, and the pollution caused to the air is also very serious.

Finally, it is advisable to warm up the car for no more than five minutes, and the car will slowly idle for a minute or two, and then the car can run.

It is said that people with good looks.

Click on the blue word above to follow!

Driving out in the morning, many drivers will choose to warm up the car and then set off, and the hot car is a thing, I believe that many drivers are no stranger to it, but many drivers are often more casual about the hot car, but the hot car is not right, and the damage to the car is also very large! Let's take a closer look at the hot car!

Why hot cars? There are three reasons, first, put the vehicle at night, the oil in the engine will flow back into the oil pan of the lower part of the engine, if it is used directly, the upper part of the engine is in a state of no oil, lack of lubrication, and wear the operating parts; Second, before the engine reaches the working temperature, its fuel supply system cannot effectively vaporize the gasoline completely because the temperature is still low, that is, the gasoline temperature rises to the boiling point and gasifies, which is easy to stall; Third, the purpose is to lubricate the gearbox gears.

In this way, it seems that it is very important to warm up the car, is it better to warm up the car for as long as possible? This can be a problem when the car is warmed up for a long time!

1. Oil consumption.

After many car owners enter the winter, they want the weather to be so cold, and the hot car should be a little longer, but the original car for a long time in situ for 5 minutes, so long is to consume car fuel, if you do this before driving every day, so that the next month, the car owners are also rubbing the fuel to **ah!

2. Waste of time.

It is also quite a waste of time to heat up the car for a long time, especially in the case of rushing to work, spending a long time to warm up the car every day, and then encountering traffic jams at work, it will definitely be too late to go to work. In general, the hot train time does not need to be too long, under normal circumstances, 30 seconds to one minute after starting, the hot car time in winter is longer than in summer, but it should not exceed 2 minutes.

3. Damage to the engine.

Heating up for a long time will cause more wear and tear on the engine, and the main wear and tear of the in-situ hot car will slowly increase the temperature of the engine, and the main wear and tear will come from cold start. The in-situ thermal car can not produce a good lubrication effect on the running parts of the vehicle, can not effectively protect the engine, and will make the engine wear more serious!

4. Carbon deposits will be generated.

5. Polluting the air.

If the car is heated for a long time, the three-way catalytic converter cannot reach the normal working temperature when the car is hot, and the car will produce a large amount of exhaust gas in the hot car for too long, so that the harmful gases can not be effectively purified, which will cause air pollution!

Correct warm-up: Under normal circumstances, you can start to speed up after driving for about 30 seconds and driving for a distance at a low speed. Let the vehicle enter the working state, during this period the speed should not exceed 2000 rpm, shift the gear and refuel, so that the correct way to warm up, the hot time should not exceed 2 minutes even in winter!

You need to warm up the car and wait until the idle speed is back to normal before driving the vehicle. 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, the first is to start the engine smoothly, and the second is to make the oil pump 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 parts, and reduce the wear and tear of the parts. On the other hand, if the dust disappears and the vehicle is driven just after starting, the engine oil has not been lubricated to all parts of the engine at this time, so driving immediately will cause the wear and tear 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.

It is not advisable to wait for the water temperature to come up before driving such a hot car.

The hot car time is too short, the engine oil flows back into the engine oil pan after stopping, and there is only a thin layer of protective oil film on the surface of the parts, and the oil is frozen in the cold winter, and the fluidity and lubrication are very poor, and it is difficult to protect the parts in a short time. But with the development of technology, the carburetor has long been gone, and now the EFI system is used, which is completely different from the previous carburetor, and the current EFI vehicle can accurately control the amount of fuel injection through the computer, and it can be stable idle in a short time after starting. At least 30 seconds of oil lubrication comprehensive, winter should be more hot car, anxious to go out can slow driving for a period of time is recommended not to exceed 2000 rpm, it is best to heat the car in situ water temperature on one or two bars, enough time can be heated through and then go.

After starting, it takes about a minute or so, and when the idle speed reaches more than 1000 rpm, you can drive on the road, but keep the speed at about 30 kilometers and remember not to drive at high speeds. Although it is common sense that everyone knows that the car needs to be warmed up before starting, there is still a lot of controversy and misunderstanding about how to warm up the car, and many people think that after starting the car, it is safer to heat up the car in place at idle speed, and wait for a period of time to drive on the road. Due to the technical limitations of carburetor engines and the fact that the oil quality was not so good at the time (e.g. too viscous), it was necessary to warm up the engine in order to achieve optimal operating conditions.

<> is generally normal idle speed is 800 rpm per minute, if it is after the fire in winter, it is basically around 1000 to 1200 rpm (new cars will be higher), as long as you wait until the idle speed drops to 800 to 900 rpm, you can go, there is no need to warm up the car for a long time. In winter, it is best not to start the vehicle and drive. Because the grease in each part is very viscous due to the low temperature, the lubrication effect is very poor.

The car has a self-heating system, the general speed is about 1000 rpm after playing the car, and the oil temperature sensor will transmit data to the driving computer after running for a few minutes, and then the speed will drop to about 700, and then you can walk normally.

Personally, I think that if the hot car time exceeds 10 minutes, even if it is overtime, there will be a relatively large damage to the car, so it is recommended not to do this.

In fact, the hot car is to keep your car in an idle state after the vehicle is started, which is generally maintained for about a minute. Because when the vehicle is not started, many machines on the car will not run, and naturally the oil on the car will not work, if this state is long, the oil will exist at the bottom of the fuel tank, if the vehicle is on fire and drives, a lot of oil can not reach the various parts of the engine at all, that is to say, there is no effect at all, and the engine of the vehicle will be damaged after a long time.

Two minutes of in-situ hot car is fine.

The purpose of hot car is to make the car reach the standard working state safely as soon as possible, and the concept of long-term hot car in the past has long been outdated.

Warm up cars are needed in both summer and winter, and the warm-up time in winter is longer than in summer. After a night of static use of the engine, the lubricating oil on each friction surface has basically disappeared, and the oil film protection has been lost; The low temperature increases the viscosity of the lubricant, resulting in poor adhesion and flowability, which increases the resistance of the engine when it starts. Driving at this time will increase the load on the engine and increase unnecessary wear.

Therefore, as long as the ambient temperature is above -10, you can drive on the road after idling for about one minute after starting. Be careful not to use the big foot throttle. When the ambient temperature is below -10 When conditions allow enough time, try to idle for a few minutes before driving on the road.

The car is lighter and more comfortable to drive. Adjust the temperature of the air conditioner to the area where the cold air is blown, select the external circulation, turn on the fan, and do not turn on the compressor. In this way, the fan blows the cold air from outside the car onto the windshield, which can also exert a certain defogging effect.

At this time, the airflow does not pass through the heating tank and does not affect the normal heating of the engine. I use this trick a lot. Spray on the windshield glass and wipe with a towel.

The principle is also very simple, that is, the surface of the live shooting is a loser, so that the small water droplets on the windshield become a water film, so as not to block the view. When the engine water temperature rises, the warm air turns on and blows the water film dry, which will still be effective next time. I think this is very important, but many car owners are very tolerant of noisy and easy to ignore that many car owners are easy to ignore the factory does not have an engine underguard, which is a good thing in summer, and the heat dissipation is more neat.

But winter is not so good. Cold weather is driving on the road, and the cold air under the engine is whistling in. The heat loss is too great, which is not conducive to the rapid heating of the car.

However, the drawback is also obvious: when the temperature is too low, the water film on the windshield can freeze. So if you're in the Northeast, the weather is not suitable for this.

That's why electric spraying cars can be on the road as soon as they are started. The electric spraying system can ensure the concentration of mixed gases under various working conditions, so that the engine is always in the best condition.

Therefore, the owner's manual that came with the manufacturer will not ask the user to heat the car. After idling for a minute, they can drive slowly on the road. Users are even advised not to heat the car for a long time and not to heat the car for a long time.

On the one hand, there is the problem of carbon deposition, which is more likely to produce carbon deposition due to the high concentration of the mixture under idle speed. On the other hand, considering the environmental protection, the engine runs under idle conditions, and the ECU oxygen sensor signal exhaust emissions are not up to standard, and the manufacturer does not recommend users to idle for a long time. Some people will worry about lubrication, in fact, it is also a superfluous concern.

While most of the oil left over from the components after the engine stalls flows back into the oil pan, there is still an oil film residue on the friction surface, and there is no dry grinding between the components after a cold start. Therefore, it is recommended that a plastic car can be installed in the later stage of the original car without the lower guard. We didn't want to protect the engine, just to make the hot car faster in winter.

It is not good for the car to warm up for a long time, and it is best to control the hot car in about 1 2 minutes.

Extending the time of the hot car, in fact, there is not much benefit to the car, when the temperature of the car is up, you can start to move the car on the road, so that you can argue with the lack of dates.

Prolonging the hot car time is not good for the car, prolonging the hot car time will cause the temperature of the engine to gradually become higher, which will damage the engine.

It is completely okay to rent a jujube car for 1 to 3 minutes for a long time, and it is not recommended to heat the car in situ for a long time. If the car hasn't been left open for a long time, there's no need to warm it up. Modern cars are basically using EFI engines, and for EFI engines, there is no need to heat up the car.

In the carburetor era, the engine did need to idle in place only to heat up for a while, but EFI engines didn't have to do this at all. The following is the relevant information: 1. Many riders basically have the living habits of in-situ hot cars, and the internal combustion of the engine is not sufficient when it is idle and rotated.

2. When the car is heated in situ, the temperature of the engine rises at a very slow rate. The accurate way to warm up the car is to start the engine and then put the gear away, just don't let the engine run at too high speed when you just start driving. 3. Driving after starting the engine can increase the load of the engine, which can increase the heating speed of the engine.

In addition, starting the engine after driving can also bring the transmission oil to the normal operating temperature as soon as possible, which is also good for the transmission.

The car warms up for 1 to 3 minutes, and it doesn't take long to get it. It is not recommended to preheat the car in situ for a long time. If the car hasn't been driven for a long time, there is no need to warm up. All modern cars use EFI engines, and there is no need to warm up the car for the EFI sail engine.

In the carburetor era, the engine did need to idle for a while to warm up, but EFI engines didn't need to do that at all.

Many riders have the habit of warming up their cars on the spot. In fact, the internal combustion of the engine at idle is insufficient. If the car is preheated in situ for a long time, the carbon deposits in the engine will increase, which is harmful to the engine.

When the car is in a hot state, the temperature of the engine rises slowly.

The correct way to warm up the car is to start the engine first and then shift the gears, just don't let the engine run at too high speed when you start driving.

Running after the engine is started can increase the load on the engine, which can increase the heating rate of the engine.

Starting the engine before starting the drive can also make the transmission oil reach the normal operating temperature as soon as possible, which is also beneficial to the transmission.

Many car owners are worried that starting the engine and then starting the driving gear will exacerbate engine wear. In fact, such worries are completely unnecessary.

Within seconds of engine starting, the oil can be quickly delivered to the various parts that need to be moistened and the oil film can be established.