What is forbidden when the car refuels?

1. No smoking and naked flame; 2. It is forbidden to start the car; 3. It is forbidden to answer the phone and call the mobile phone. 1. Smoking and naked flame are forbidden, which is basically known to all friends and the most basic. The gas station is a fuel-intensive area, and any Mars can basically cause gasoline to burn, so in the gas station, anything related to fire.

What is forbidden when the car refuels?

1. No smoking and naked flame; 2. It is forbidden to start the car; 3. It is forbidden to answer the phone and call the mobile phone.

1. Smoking and naked flame are forbidden, which is basically known to all friends and the most basic. The gas station is a fuel-intensive area, and any Mars can basically cause gasoline to burn, so it is basically necessary to ban anything related to fire in the gas station.

2. It is forbidden to start the car. When filling up at the gas station, the car must be turned off. If the car doesn't turn off, the engine is still running at high speed, even though the car body doesn't move. The working engine must have current. It is very dangerous if the circuit is short-circuited or leaked at this time. Because the minimum ignition energy of gasoline is only 0.2 mJ, which is equivalent to the energy generated by a needle falling from the height of 1 m on the concrete floor, any tiny spark or invisible static electricity can basically be achieved with such a small ignition energy.

In addition, when refueling a car, the concentration of oil-gas mixture at the mouth of the car fuel tank will also increase accordingly, because the density of this mixture is higher than that of air and it is not easy to spread. When the engine is working, the exhaust port of the car will discharge exhaust gas, which is very dangerous to carry Mars.

3. It is forbidden to answer the phone and call the mobile phone. Mobile phones will emit frequencies, and some high-frequency mobile phones will cause interference and easily lead to the explosion of oil depots. Why do cars have to change gears frequently when driving?

I often hear old drivers say that they should shift gears frequently when driving manual gears. Many drivers don't understand what this means. In fact, I think the accurate statement should be to shift gears frequently under the right conditions, not to say that you have to shift gears constantly when you open the manual gear. Otherwise, the car will not run.

Why do you change gears frequently? What exactly is the correct "frequent shift change"? We can learn from these aspects:

Ensure driving comfort.

We must have encountered such a situation: traffic jams, cars moving fast and slow, stop and go. At this time, if you want to keep up with the traffic, you must switch frequently between the first gear and the second gear, but many times when you change to the second gear, the traffic will slow down and you have to change gears.

Some drivers only use first gear because it's too much trouble. When the speed is low, the idle speed only remains unchanged. When the speed is high, step on the accelerator more and pull up the speed, so as to keep up with the rhythm.

However, this will greatly reduce the ride comfort, because the engine power of the first gear is very high. If the throttle of the first gear is slightly loosened at high speed, there will be a strong engine power, which will lead to obvious frustration, and some carsick passengers simply can't stand this toss.

Therefore, when following the car, you should choose the appropriate gear according to the speed. Needless to say, old drivers are born perfect. And novice friends should not be afraid of trouble. Get your feet and your right hand moving. Start from first gear. If the speed is right, you can move up to second gear. Even if the second gear only runs for two seconds, if it is a big deal, you just need to pick up the gear. In this way, we can understand the true meaning of manual gearbox driving in frequent shifting. And your car will drive more stably and smoothly.

fuel-efficient

Some drivers like to drive at low speed and high speed, some like the feeling of full power, and some people are not skilled in shifting gears, fearing that they will not have enough power after upgrading. In fact, this will lead to higher fuel consumption.

Because for the current family car, in the case of normal driving, no resistance is the same as the speed, and the lower the speed, the lower the fuel consumption. This is related to the working load of the engine, but I won't elaborate here because the specific principle is a bit complicated. If you are interested, we will discuss it separately another day.

Therefore, if you don't accelerate or overtake while driving, if you have enough power, you can frequently shift gears according to the vehicle speed, so that the engine always works in a relatively low speed range, which is helpful to reduce fuel consumption.

Improve driving comfort and reduce vehicle impact loss.

The old driver must have guessed when he saw this. Yes, it is procrastination. Some drivers especially like high and low gears, although they can save fuel. But there must be a degree, at least the motivation must be guaranteed. But some drivers don't. I saw that the speed of the fifth gear engine was close to 1000 rpm, but I still didn't downshift and was hard resisted by the throttle. As a result, the engine shakes and the transmission shaft shakes, and the whole car feels that all parts can fall off.

In this way, the passengers can't stand driving to one side, even the car itself can't stand it. Therefore, we must ensure that we don't turn off the engine when driving. As long as we feel that the power of the current gear is insufficient, don't hesitate to shift gears directly.

Ensure the flexibility of driving.

Many old drivers don't like automatic gearboxes because they have completely used manual gearboxes. By predicting the road conditions, they can switch the appropriate gears in advance and keep the car at full power, which is beyond the reach of any automatic gearbox.

For example, there is a section of road in our local area, and the road conditions are more complicated. First, a sharp turn, and then a steep slope 50 meters away. Inexperienced drivers always put in high gear, hold the throttle firmly and turn, and then step on the throttle to accelerate uphill. However, this bend is too urgent. General family car card 60 turns. At this time, the engine speed is about 1500 rpm. This speed is still the fifth gear, and the speed of 50 meters can't be lifted at all. Downshift is necessary when climbing a hill. Because the slope is too big, it is difficult to increase the speed after downshifting. Therefore, many cars climb hills like snails, and drivers still blame the lack of power.

Experienced drivers will downshift and accelerate when turning, which can quickly increase the speed. Then they will climb the mountain at full speed.

There is another situation, for example, there is a local train in front of you and you want to overtake it. Because the distance between cars is relatively close, the best way is to downshift and quickly accelerate overtaking.

For example, if you are accelerating, you are suddenly not allowed to overtake. At this time, the engine speed must be higher. If the throttle is released directly, the starting mechanism will have great power, which will cause retrogression and speed loss. At this time, the best way is to immediately change into a high-speed gear to follow the car, and then overtake when conditions are right.

Because there are many shifting operations in actual driving, there are various shifting strategies according to the driver's intention and driving habits, which are all to meet the driving needs. What I said above is just some personal feelings. I believe that every driver friend who is used to manual gearbox has his own unique liar. Therefore, when driving a manual gearbox, you can try various shift strategies according to your own needs, and with the passage of time, you will experience the real pleasure of the manual gearbox. What is forbidden when a car refuels @20 19