Why is the engine so loud when the car is ignited in winter?

Because the hot train time is relatively long. First, after the car has been parked for a long time, 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 a long period of inactivity (e.g. overnight), the upper part of the engine is in a state of lack of oil and lubrication.

It takes about 30 seconds after the start of the oil pump to deliver the oil to the pistons, connecting rods and crankshafts of the engine, which need to be lubricated the most. But even if you start the engine and hit the road immediately, as long as you don't slam on the accelerator and keep running at a low speed, the effect is the same as idling. Second, before the engine reaches the operating temperature (about 90-110 degrees Celsius), the fuel supply system is still too low to effectively vaporize the gasoline completely (as we all know, the temperature of the liquid rises to the boiling point).

In gasoline has not yet been vaporized"Wet"When it is liquid, it is not easy to burn and start the engine. At this time, it is necessary to rely on the effect of the choke to prevent part of the air from entering the cylinder, so as to improve the mixing ratio of gasoline and air, and increase the engine speed so that the engine does not stall. When the normal working temperature is reached, the automatic choke will naturally return to its normal state due to the action of the machinery; And the manual choke car must remember to put the choke back, otherwise because the oil-gas mixing ratio is too high, not only waste gasoline, horsepower is insufficient, and gasoline combustion is not completely black smoke.

It takes about seven or eight minutes to ten minutes for a cold engine to reach the normal working temperature, depending on the type of car; And during this time, there is no need to heat up the car in situ, as long as it is not driven at high speeds. Third, the lubrication of gearbox gears is the most unknown and easily ignored by ordinary people. The transmission gear oil is the same as the engine oil

In cold driving, the gear oil flows to the lower half of the gearbox. Only when driving will the bottom gear oil be lifted up due to the operation of the gears and the upper part will be lubricated. This is also the reason why most cars change gears jerkily when they are cold.

The solution is not something that can be solved by in-situ hot cars. Because the gearbox does not have a gear oil pump, only the engine is moving, and the rest of the car is not moving, and only after the actual road and driving slowly for a period of time can this situation be improved.

When starting the car in winter, the engine is loud and the speed is high, is there something wrong with the car?

Dear Kiss Glad to serve you The reason why the engine sound of the car ignition in the morning is particularly loud: 1. The sound of the car is particularly loud, it may be that there is a problem with the rubber gasket between the engine and the frame, if it is aging or loose, it will make abnormal noise. The gasket is mainly to allow the engine to have a buffer time in the process of vibration, but if the foot glue is aged, it will make the motor engine shake when working on the bridge.

2. If the engine cylinder is damaged, the exhaust gas discharged from the cylinder during normal operation is uneven, which will also make the exhaust pipe shake, and there will often be a sudden sound. 3. If the gears on the vehicle parts are hardened or the gap between them is not properly adjusted after long-term use, it will also cause the engine to be loud when ignition. In this case, it should be replaced in time, and some lubricating oil should be added.

4. When there is carbon deposition in various departments of the car, there will also be sound, this is because in the process of volatilization of gasoline, some of them will not volatilize in time and will coagulation, and the coagulation will cause some parts to be affected by carbon deposition.

In winter, the temperature is low, after the car is parked overnight, the oil in the engine cylinder will flow to the bottom shell, due to the low temperature, the oil fluidity is poor, when the car starts, the lubrication effect is far less than the state of summer, resulting in a louder friction sound inside the engine, making a sudden sound. When the oil flows from the oil pan to the engine after a period of starting, the oil temperature rises, the lubrication returns to normal, and the engine is silent.

This is also the reason why we use the corresponding engine oil in winter, and we need to use low-temperature resistant engine oil in winter. Be careful not to use inferior engine oil, the oil becomes thicker in winter, and inferior engine oil is easy to cause engine wear and tear and cause failure for a long time.

The engine is loud, and it may also be caused by the aging of the rubber connection between the gearbox and the body, and the normal rubber sound insulation effect is good, so the sound is not loud. Low temperatures will harden the rubber, and the aging rubber will have poor sound insulation at low temperatures. If it is the cause of rubber aging, you need to go to a 4S shop or repair shop for maintenance as soon as possible.

Third, the car belt is too tight, and the belt hardens due to the low temperature, resulting in the sound of the automobile-related parts being in contact with too tight. Go to a 4S shop or repair shop for maintenance.

In addition to the fact that the engine is louder in winter than in summer, the temperature inside the car is particularly low in winter, which provides a comfortable environment for the driver. Turning on the heater in winter will increase the fuel consumption of the car, so how can you turn on the heater without using fuel?

Start the vehicle first, let the vehicle idle in place, and do a warm-up. This is done because the engine temperature is still very low when the vehicle is first started, and idling in place helps the engine to rise, which in turn drives the coolant temperature up.

When the pointer of the water temperature gauge reaches the middle position, turn on the heater switch and turn on the external circulation, which helps to remove a part of the cold air in the car from the car, and after 5 minutes, switch to the internal circulation, so that the temperature in the car can be quickly adjusted to the set temperature, and will not cause too much burden on the engine.

At the same time, one thing to pay attention to is to turn off the AC when turning on the heater, if the AC is turned on, it means that the air conditioner is turned on, which virtually increases the load of the engine and improves fuel consumption.

The reason why the car engine is loud in winter is generally because of the engine oil, and the oil is when it arrives. It is oil that is in a precipitated state between the various components within the oil pan. As gravity has already flowed to the bottom crust, it has already been one's own.

The spy will get bigger. As long as. Running for more than two minutes should all decrease.

Many car owners complain that the noise of their cars is getting louder and louder, what is the reason?

It is normal for the engine of the car Dongqiao Wang Chatian to be loud.

When the temperature of the engine reaches normal temperature, the opening of the throttle is reduced a little, and the noise is reduced a little. In fact, this phenomenon is quite normal, especially in winter, when the engine is operating at its own temperature and drives various equipment.

Often the opening of the throttle is larger, the noise of the engine is larger, and when the various equipment is running normally, the temperature of the engine reaches the normal temperature, the opening of the throttle is reduced, and the noise is reduced. Models with turbocharged engines are noisier with cold starts.

Notes:

1. The engine cold start noise is large, and the vehicle is parked outdoors for a long time in winter, and the lubricating oil basically flows to the bottom shell at this time, and the oil pressure cannot be established immediately, and the lack of sufficient lubrication during the start will lead to a clattering sound. After a while idling, it will return to normal.

2. In winter, the temperature is low, and the oil concentration becomes thicker, especially the inferior engine oil, which can easily lead to problems in engine operation, and the poor lubrication effect leads to engine friction, resulting in noise. Choose an oil label that conforms to the local temperature and add ** oil.

3. The tightness of the belt is not enough, the weather is cold, the belt will be tighter than usual, and when the tightness of the engine belt is not enough, the engine will produce sharp noise.

1.Normal. In the low temperature season, if the engine of the vehicle makes a lot of noise, the reasons are:

When the vehicle is parked in a low temperature place, the internal lubricating oil will all flow to the bottom shell, and the fluidity of the oil will be greatly reduced, so when the vehicle is started, the parts cannot be fully lubricated in a short time, resulting in noise; When the temperature is low, the belt will be tighter than in other seasons, resulting in a high-pitched sound.

2.If the vehicle does not start in winter, there is still obvious noise of rubber pins, the main reason is: the foot rubber is aging or loose, and its main beam is to reduce the vibration and bridge buffer generated by the engine as much as possible, which has a certain fixed effect on the engine.

Once aging or loosening, it will cause the engine to shake more and more and make noise; A lack of cylinder in the engine can also cause the vehicle to make a loud noise. The solution to this situation is to check the working condition of the ignition coils and cylinder spark plugs of the vehicle, and replace them if necessary.

The rattle of the valve. Generally, due to the vehicle being parked for a long time, the engine lubricating oil returns to the oil pan. When the engine is first started, the oil pump does not provide immediate oil pressure, so that the internal valves of the cylinder head are not lubricated.

When the lubricating oil flows out through the arm, the sound will decrease, or even disappear. This is very normal. Even the best vehicles have this sound, but the noise is different.

There is an old saying in the car repair industry, which is called the pin of a cold car and the tile of a hot car. There is also the solenoid valve, if it is the last one, then you have to say that you are a little too sensitive! The judgment method is also very simple, when the sound is slightly blocked, add a little oil in the oil injection mouth If it doesn't sound to say, if your voice walks in front of me, as long as you hear it, you basically know the reason, so many repairs say start the car and let me listen to the judgment again, I basically don't have to, if the judgment is not accurate, the general climb up to listen to the inaccurate, is in the blind guess.

It is estimated that the valve rings for the cool car, the solenoid valve for the carbon canister may sound for the hot car, and the high-pressure oil pump may sound if it is a TSI engine. The latter two are normal. In general, when the car starts cold, the engine sound will be slightly louder than when the car is hot, as long as the sound sounds uniform and soft, not harsh, there is generally no problem.

Most of them are valve sounds, which are related to oil pressure, hydraulic tappets, and engine oil. Don't worry too much about it. Cars are consumables.

The oil is not enough, mine is that the oil level is not on the scale line, resulting in sound seepage, add oil to the upper limit will not sound, maintenance must pay attention to look at the oil dipstick, the engine just started when the oil pump can not immediately provide oil pressure, so that the internal valve of the cylinder head can not be lubricated. The resulting click-and-click sound. When the engine has been running for a period of time, the oil temperature rises and the engine starts to work normally, and the sound will automatically disappear.

The oil in the oil tank is pumped back into the engine for lubrication, so the sound is quiet for a minute or so. It is recommended to start the machine after the sound has become quieter and allow the machine to be fully lubricated.