【The owner's family car knowledge】Most people’s conception is that when you want to use the car early in the morning (or if you haven’t used the car for a long time), it’s most beneficial for the car to warm up at an idle speed and wait for three to five minutes before getting on the road.
But actually? Are you sure this is the correct way to warm up the car? According to a statistic, more than 90% of the wear and tear of the engine parts is caused within three minutes after the cold car starts. of.
Therefore, how to properly heat the car is believed to be a topic of concern to all car lovers. But before we explain the hot car, let us first understand why the car needs a hot car.
Understand the three reasons for hot cars
First, after the car is parked for a long time, the oil in the engine flows back into the oil pan at the lower part of the engine. Therefore, when the engine is started after a long period of unused vehicle (such as overnight), the upper part of the engine is in a state of lack of oil and lack of lubrication. About 30 seconds after starting, the oil will be transported to the piston, connecting rod, crankshaft and other parts of the engine that need lubrication most due to the operation of the oil pump. But even if it is on the road as soon as the engine is started, as long as the car is not slammed on the accelerator and the car is kept at low speed, the effect is the same as idling.
Second, before the engine reaches its operating temperature (about 90-110 degrees Celsius), its fuel supply system cannot effectively fully vaporize gasoline because the temperature is still low (I believe everyone knows that the liquid temperature rises to The boilin
【The owner's family car knowledge】Most people’s conception is that when you want to use the car early in the morning (or if you haven’t used the car for a long time), it’s most beneficial for the car to warm up at an idle speed and wait for three to five minutes before getting on the road.
But actually? Are you sure this is the correct way to warm up the car? According to a statistic, more than 90% of the wear and tear of the engine parts is caused within three minutes after the cold car starts. of.
Therefore, how to properly heat the car is believed to be a topic of concern to all car lovers. But before we explain the hot car, let us first understand why the car needs a hot car.
Understand the three reasons for hot cars
First, after the car is parked for a long time, the oil in the engine flows back into the oil pan at the lower part of the engine. Therefore, when the engine is started after a long period of unused vehicle (such as overnight), the upper part of the engine is in a state of lack of oil and lack of lubrication. About 30 seconds after starting, the oil will be transported to the piston, connecting rod, crankshaft and other parts of the engine that need lubrication most due to the operation of the oil pump. But even if it is on the road as soon as the engine is started, as long as the car is not slammed on the accelerator and the car is kept at low speed, the effect is the same as idling.
Second, before the engine reaches its operating temperature (about 90-110 degrees Celsius), its fuel supply system cannot effectively fully vaporize gasoline because the temperature is still low (I believe everyone knows that the liquid temperature rises to The boiling point is vaporized). When gasoline has not yet vaporized and is in a "wet" liquid state, it is not easy to burn and start the engine. At this time, it is necessary to rely on the choke valve to prevent part of the air from entering the cylinder to increase the gasoline/air mixture ratio and increase the engine speed to prevent the engine from stalling. When the normal operating temperature is reached, the automatic choke will naturally return to normal due to mechanical action; and the car with a manual choke must remember to put the choke back, otherwise the oil/gas mixture ratio is too high, not only will it waste gasoline, but also horsepower. Insufficient, and the incomplete combustion of gasoline will cause black smoke. It takes about seven or eight minutes to ten minutes for a cold engine to reach normal operating temperature, depending on the type of vehicle; and during this period of time, there is no need to heat the car in place, as long as it does not drive at high speed.
Third, the lubrication of transmission gears is the least understood and most easily overlooked by most people. The transmission gear oil is the same as the engine oil: when the car is cold, the gear oil flows to the lower half of the transmission. Only when driving, the gear oil at the bottom will be taken up by the operation of the gear to lubricate the upper half. This is why most cars change gears jerky when they are cold. The solution cannot be solved by in-situ thermal vehicles. Because the gearbox does not have a gear oil pump, only the engine is moving in a hot-situ car, and the rest is not moving. Only after waiting for the actual road and driving slowly for a period of time can this situation be improved. , The correct way should be to drive slowly at a low speed.
Based on the above three points, it is really unnecessary for the idling in-situ heat car, because the effect is limited, but it also wastes gasoline and time (plus polluted air). In addition, when the engine is idling, the gasoline may also cause carbon deposits due to incomplete combustion, which will damage the engine even more. What's more, some car owners also like to slam on the accelerator when idling, which disturbs people's dreams early in the morning. This action will cause the engine to wear out quickly and seriously damage the engine's parts. There is no benefit at all. I don't know what is the purpose of these people doing this?
Therefore, the correct way to warm up the car should be on the road 30 seconds to one minute after the start. But at this time, do not drive at a high speed, keep it at a low speed, and the engine speed should not exceed 3000~3500 revolutions. Generally maintain 2000 revolutions. Otherwise, the violent wear and tear of the engine and gearbox will be irreparable. After the engine temperature rises to the normal working temperature, resume the "personal habit" driving method.
The most authoritative way to warm up the car in winter. The EFI car can be heated in 30 seconds in winter. In winter car maintenance, the problem of engine part wear is more prominent, and more than 80% of the reasons are because the owner has not heated the car or has not mastered the hot car time. Caused by fast speeding.
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