Which way is better to preheat the car when it starts to preheat on the spot, or to start it slowly

I think it's better to warm up slowly, because it saves a lot of time, and it will warm up a little faster, and it won't hurt the car.

I think it's better to warm up in place. It will heat up a little faster.

It is better to start the preheating slowly, because the heat in situ will cause carbon deposits in the engine, and the preheating speed is also very slow, which is a waste of time.

It is better to preheat than not to preheat. Some people will say that you are wasting gas by heating up your car, so you might as well start and save gas, which is what it looks like. Not really.

It was my own experience that shattered this belief. Because the car engine has requirements for temperature, the engine temperature reaches 80 degrees, which is the most fuel-efficient at the moment, the higher the engine temperature, the lower the oil cost, because the temperature of your car is very low after cold start, if you reduce the speed, it is declared to be in the low speed range, and the low speed range is the original oil, and the cold engine drags the car to run, and the automatic PC fuel injection is required to increase more; The engine does not heat up for a short period of time, so it costs more fuel.

It is often the distance you drive at low speeds that is super fuel-guzzling. If you are warming up, the engine is idling, first of all, the engine load is small, although the temperature is not as fast as the car moves, but it does not mean that his temperature rises slowly, it is also very fast. Explain again, why do people say that cars should start slowly?

In fact, this is to protect the engine from excessive engine speed, because the temperature of the cold engine oil does not rise, the oil can not provide protection to the engine, causing wear and tear to the engine, which is the unanimous argument of automotive experts.

So in order to reduce the wear and tear of the engine and prolong the service life, we recommend that the car should be driven at low speed. This is also for better engine maintenance, but walking at slow speeds consumes a lot of fuel. So I recommend that the cold car must be warmed for 1 to 5 minutes after starting.

1 minute in the southern region. About 5 minutes in the northern area. Normal driving after heat, don't be too fierce on the gas pedal line, it is better than driving at a turtle speed after you start, to save more fuel, because you are afraid of hurting the engine, since you are afraid of hurting the engine, it is better to heat up the car and drive normally.

The most important point is that there is no load for a short time in the in-situ hot car, there is no oil at all. You can experiment with my method, and the fuel consumption is absolutely low. The CVT is the worst type of automatic transmission because its shifting structure is not an ordinary set of gears, but two sets of tapered wheels and steel belts driven by rolling friction.

In the process of rolling friction transmission, wear is inevitable, and the service life of the taper wheel steel belt as the core is very short. Only after the free addition of the lubrication system can the time be extended appropriately. However, when the vehicle is started at low temperatures, the fluidity of the transmission oil is very poor, and the cone pulley steel belt cannot be lubricated normally.

It is better to preheat the car in situ after starting, because this is a protective role for the car, and starting it after the preheating is enough to reduce the friction of the car.

After turning on the engine of the vehicle, stop for a while, and then start slowly, drive the car out and start the car.

I think it's better to start the preheating slowly, because if you preheat it on the spot, it is likely to increase the friction and cause tire wear.

When the car starts cold, you can start the car first, and then you can warm up while walking in gear for about ten seconds. When the water temperature does not come up, slow down the good state source to refuel, drive at a constant speed, and run a few kilometers when the water temperature comes up, you can increase the speed normally.

In places where the winter is extremely cold in the north, it is still necessary to warm up before starting.

The best way is to let the car go slowly in about 10 seconds at the start, and then accelerate after 10 seconds, that is, it is good to preheat while walking, because this will cause the least damage to the car, but the premise is that the oil used in the car must have good fluidity at low temperatures, and at the same time adjust the time of preheating while walking according to the specific temperature, if it is in the winter of the north, the preheating time is longer.

The best way to do this is to let the car drive slowly about 10 seconds before starting and then accelerate after 10 seconds, i.e. warm up while driving, as this will cause minimal damage to the car. However, the premise is that the oil bend used in the car must be buried in a state with good fluidity at low temperatures, and at the same time, adjust the warm-up time when walking according to the specific temperature. If it's winter in the north, the warm-up time is longer.

It's a warm-up first. This is better for car engines. It can extend the service life of the car engine.

The best way to do this is to let the car drive slowly for about 10 seconds before leaving, and then accelerate after 10 seconds, i.e. warm up while driving, as this will cause minimal damage to the car. However, the premise is that the oil of the machine used in the car must have good fluidity at low temperatures, and at the same time, adjust the heating time when walking according to the specific temperature. If it is winter in the north, the heating time is longer.

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?

The car should be idle to warm up after starting.

Generally speaking, after the engine has been standing overnight, the residual pressure of the lubricating oil on each friction surface has long disappeared, and the oil film protection has been lost; The low temperature greatly increases the viscosity of the lubricating oil, and the adhesion and fluidity become poor. At this time, the movement resistance of the starting engine is greatly increased, and more than 60% of the power at the start is used to overcome the movement resistance of the cold engine. Authoritative research results show that the chiller needs to be preheated.

The amount of wear on the engine during cold starts is about the same as in other operating conditions. In other words, the amount of wear on the engine during cold start accounts for about half of the total wear.

Normal idle warm-up can reduce this wear and tear and extend the life of the engine. At low temperatures, the metal exhibits less elasticity and wear resistance; Only at operating temperatures can the engine achieve normal mating clearance and maintain optimal working condition. After starting the engine at a low temperature, start and walk the car.

Due to the uneven mixing ratio, the engine output power is insufficient; At low temperatures, the fuel with insufficient atomization cannot be fully combusted, and carbon deposits are easy to form; Some gasoline is not atomized, and will flow directly into the crankcase along the cylinder wall to mix with the oil, reducing the quality of the oil. But the longer the hot car is not always better. If the car is heated for a long time, the engine will be useless and waste fuel, which is not conducive to environmental protection.

Under normal circumstances, it is advisable for low-end cars to be able to idle normally. The normal idle speed is reduced from 1200rpm in the fast idle state to 800rpm, and you can walk the car just by looking at the tachometer normally. Warm-up is not only the engine, but also the gearbox.

In the cold state, multiple starts should be avoided, because multiple starts will aggravate the wear of moving parts and reduce the overall working life of the parts and even the engine.

There is no need, it is correct to start and go immediately, preheating is a thing of the car in the past, and now the progress of automotive materials is too great, you can not preheat, and the piston clearance is no problem.

Preheating costs oil and is polluting, so it's really unnecessary.

The viscosity of cool engine oil is higher than that of heat, and the oil film is stronger than that of heat, in other words, the lubrication performance is better, but the resistance is greater than that of hot engine oil, and the resistance is more gasoline-consuming, which is also the reason for using low-viscosity oil in winter. The lubrication of a cold car is better than that of a hot car.

In the past, automobiles had a high coefficient of expansion due to the poor materials used in pistons, etc. In order to ensure the piston clearance of the hot car, it is a normal size when the hot car is hot, and the piston gap left in the cold car is relatively large, so that the gap is too large when the cold car is cold, the power is obviously insufficient when it is just started, and it is easy to be damaged when the gap is not suitable, resulting in partial mushrooms, so it is necessary to preheat and make the piston gap to the appropriate fit, which is the outdated operation technology left in the past, and it can be dispensed without, so it is said that you can go away with it. However, it is better not to jerk oil, after all, there is also the problem of piston clearance.

After preheating, the temperature of the engine oil in the chassis will rise, and the oil will be thick and hard when the temperature of the car is low, and when the temperature of the car rises, the oil will be a little thinner, so that the gear type of the car is intentional to avoid unnecessary wear.

The oil is not reaching everywhere in the machine. It is better to warm up the car at a slow speed. The gearbox is also fully lubricated!

Need a hot car.

Why: 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.

Give you three food for thought, 1. Is the expansion coefficient of various metals the same? 2. The relationship between the flow speed and temperature of the engine oil, 3. Where is the oil after the vehicle has been parked for a long time? With these three questions figured out, you can understand why the engine should be warmed up. Answer: Section.

First, because the parts of the engine are made of different metal materials, their expansion coefficient is also different, in the cold car state, the gap between the parts is large and small, the two parts with a large gap will collide, and the two parts with a small gap will increase wear due to the gap is too small. Second, after stopping, due to gravity, the lubricating oil will flow downward, and when the car is stopped for a long time and then started, the wear and tear of the engine parts will be aggravated due to the lack of oil. 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, so whether it is winter or summer, when starting the car in the morning, it is best to warm up for a few minutes, and wait until the water temperature reaches the standard value before starting the car.

EFI cars generally need to be warmed up when starting, but the warm-up time does not need to be too long, and the criteria for judging are: the water thermometer pointer just starts to move, or the engine tachometer drops back to the idle state after starting, which takes about a minute.

It is recommended that the owner drive at a low speed for the first 2 kilometers after starting, and then speed up normally.

Look at the outside temperature in this way, if it is at a normal temperature, there is no need to preheat; If it is really winter, it is necessary to idle for 2-3 minutes after starting to warm up the engine, but do not preheat it for too long, and should drive at no more than 2000 rpm after idling for 2-3 minutes until the water temperature reaches normal before driving normally.

Because when the car starts cold, the inside of the engine is not fully lubricated, in order to reduce the wear and tear inside the engine, the correct way to warm up the car should be, after starting 30 seconds to one minute after the road, but at this time do not drive at high speed, should be kept at a low speed, the engine speed is generally kept below 2000 rpm, and after the engine temperature rises to the normal working temperature (it takes about 3 to 5 minutes), and then resume normal driving. It not only reduces carbon deposits, but also achieves the effect of hot cars.

Hello, the correct use of the method is to warm up. At present, it is generally not recommended to preheat for a long time in the idle shutdown state, and fuel consumption is also easy to form engine carbon deposits. Generally, the car idles for a minute, and then drives at a speed of twenty or thirty yards until the water temperature is warm, and it can drive normally.

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