There is never a shortage of pseudoscience and IQ taxes
Most patients with mild disease have many mistakes in raising a car, and patients with severe disease are covered with fuel saving cards
For example, there have always been articles on the Internet that say:
It is recommended that you do not wait until the oil lamp is lit before refueling, the reason is that the oil pump will overheat due to lack of oil to dissipate heat, shortening the life. ......
The oil pump lies at the bottom of the tank all year round
It does need to dissipate heat
Where are the gasoline pumps in our cars? Quite simply, it hides in the gas tank. Where is the fuel tank? Quite simply, under the "back row butt". Yes, under the seats in the back of most cars is the "base" of the fuel tank.
The gasoline pump "hides" in the tank, in fact, its position is just at the bottom of the tank.
As for "the oil pump is overheated due to lack of oil"... The gasoline pump hides at the bottom of the tank and is soaked in gasoline. When the gasoline pump is working, it does heat up, and it does need to dissipate heat. There is an article on the Internet that says that "the oil pump relies on gasoline to soak heat dissipation, too little gasoline, the oil pump will expose the oil surface, it will be exposed to the air, and heat dissipation will become a problem." And many car owners believe this statement. In fact, this statement is also a complete pseudoscience!
The fuel pump has a plastic enclosure
As long as the oil supply is normal, it will not overheat
The heat of the gasoline pump is indeed dissipated by gasoline, but the structure of the gasoline pump is very special: there is a large plastic shell on the outside of the gasoline pump motor, the gasoline is first sucked into the plastic shell, and then the "intimate contact" with the oil pump motor takes away the heat of the motor, and finally the "hot gasoline" is sucked in by the suction port in the plastic shell... Send it to the engine.
The working principle is the same as that of a submersible pump, but this fuel pump basically only works with oil. The fuel pump is not completely submerged in the fuel, the top is mounted on the tank housing, and the lower part is pressed directly to the bottom of the tank by a spring pressure bar.
The lower part of the fuel pump sucks oil, the upper pipe is output to the oil pipeline, the oil pipeline is then to the engine high-pressure oil pump, and the excess fuel part is sent back to the tank through the return pipe. At the moment when the car is energized, everyone will hear the sound of a motor running, that is, the fuel pump is working, to ensure that the engine receives fuel for the first time when igniting, and this time only lasts for 1 to 2 seconds;
When the engine continues to work, the fuel pump will also continue to work and pump oil.
When the engine stops working, the fuel pump will also stop working synchronously, and part of the return oil in the return pipe will naturally flow back to the tank through the pressure difference. During this period, the fuel pump will work to heat up, but it has to pump oil itself, and heat dissipation can be achieved by taking away heat from the fuel.
And the old drivers said the oil pump burned down
The fuel pump idles, overheats, burns out
The fuel pump pump oil is not coherent, resulting in incoherent engine oil supply (similar to the suction pipe sucking to the end), affecting combustion and causing engine knocking;
But in reality, this does not exist. In order to ensure that the fuel pump does not idle, the fuel pump only works in advance at the moment of power-on, and the rest of the time is synchronized with the engine, and the engine does not work without oil, so there will be no idling! In addition, the manufacturer will not allow there to be an excessive heat source in the fuel tank!
Modern cars emphasize "safety margin" when designed, and usually we all know that after the car oil lamp is lit, the car can still insist on driving at least 30 kilometers (many cars can stick to 50 kilometers) before lying down.
If you really run out of oil, you can hold on a little longer
Generally speaking, when our fuel gauge lights are on, we have to refuel within 50 kilometers, and according to the highway rest area settings in our country, there is generally a service area that can be refueled every 57 kilometers. The owners of the car are very relieved about this piece.
But everything has a case is not, if the masters are really very embarrassed. What should I do when I happen to be in a situation where there is no shop in front of the village and there is no shop, and the insurance company has not been able to deliver the oil?
Next, Tai Ge taught everyone some emergency moves, and I hope that all the masters would do not use them.
★ Control the speed of the car, try to run at a uniform speed of the current mainstream 1.4T-2.0T car, the most fuel-efficient speed is between 60-85Km; self-priming between 2.0-3.0, 55-75Km is the most fuel-efficient. In the fuel-saving mode, the higher the speed, the more fuel-intensive, the speed on the high speed is best around 90kph, because if it goes down, it will exceed the minimum speed limit, and it is very troublesome to violate the rules or be smothered by the rear car.
★ Drive as fast as possible to avoid congestion Once the fuel is in a hurry, you must predict the surrounding road conditions in advance and avoid frequent braking. The brakes themselves do not cost oil, but deceleration and acceleration cost oil. In addition, do not drive at a low speed, if the speed is too low, it is no different from idle speed, which is quite fuel-intensive at that time.
★ The resistance of closing the window and turning off the air conditioner is not small, especially in the process of driving the car, closing the window will save a lot of oil, and opening the window will increase the fuel consumption, which is still somewhat different from the cognition of ordinary people. For example, some air conditioners, navigation, etc., these high-power electrical appliances will only increase the burden on the engine and increase fuel consumption.
If you still can't get to the gas station, then Tiger's last two methods can also be used.
Add alcohol directly to the tank
If you're lucky enough to have a high degree of liquor or medical or industrial alcohol in your trunk, don't be afraid! Can be directly added to the tank as emergency fuel, the reason is very simple alcohol is also a simple hydrocarbon fuel, calorific value is slightly lower than gasoline, but has sufficient oxygen content. Therefore, it is no problem for the masters to use in the short term.
The worst case is to add water to the tank
This situation is basically to wash the rhythm of the fuel tank, this emergency means is to use the characteristics of different proportions of oil and water, oil and water incompatibility to forcibly increase the fuel level, so that the vehicle can continue to drive. However, this situation is quite risky, and excessive addition may cause engine damage, and the words that the masters are using are cautious and cautious.