Do I need to wear a mask when driving?
1. Is it necessary to wear a mask in the car?
Whether a car wears a mask is not whether others wear it, but whether your car needs it.
If your car is parked in a place with many flying objects such as catkins for a long time, it is very necessary to wear this mask. Because whether you drive or not, catkins will fly into the car grille.
One more thing, if your car is really covered with catkins, then your car must wear a mask. The reason will be explained later.
If the environment in your city is well managed, there are few flying objects, including catkins. If you just run around the city, you can save this nondescript thing.
Radiator blockage
Second, why do you want to wear a mask for the car?
As we all know, the engine radiator and air conditioning radiator of an automobile are behind the grille of the automobile, and the radiator is made of very precise heat dissipation materials. Numerous cooling holes are distributed on the radiator, so that the car can work quickly when it needs cooling or heat exchange. However, if the cooling hole on the engine radiator is blocked by catkins or other dirt, the working efficiency of the radiator will drop sharply, which may lead to high temperature and damage the engine under extreme working conditions. If the cooling hole on the radiator of the empty switch is blocked, the cooling effect of the empty switch will be greatly reduced, or even unable to dissipate heat. Maintaining your car more than usual is better than being slaughtered at the maintenance point.
.
A friend said that the radiator is blocked and can be washed away with a water gun! Come on!
The reason why we put masks on cars is because the radiator itself is fragile and can't bear the impact of ordinary water guns. The impact of the water gun on the heat sink will cause the heat sink to fall off, which is a kind of blockage that is difficult to repair. Do you want to replace the radiator?
Third, how to properly maintain the radiator?
In fact, there are many ways to maintain the radiator of a car besides wearing a mask.
The most common method is to install insect-proof nets on cars. This thing is easy to find on the Internet. It is most suitable for special cars and easy to install. The basic principle is to install a mesh grille in front of the radiator, which is convenient to install and clean and is a once-and-for-all method.
The reason why I don't recommend this kind of "mask" is that this kind of mesh is neither beautiful nor durable, and it will rot after several uses, and it can't protect the radiator. Inadvertently blocking the number plate will be fined by the traffic control department.
If you don't have a car "mask" or insect net, please lower your noble neck, stick your head on the air intake grille in front of the hood and look inside carefully. The current situation of the heat sink will shock you. Yesterday, because of the hot weather, the author turned on the air conditioner and found that the refrigeration effect of the air conditioning system was not good. I got out and checked the radiator. Catkin and insect bodies are covered with fins. Today, the fins were thoroughly cleaned.
4. How to clean the heat sink?
There are two ways to clean the radiator. One is an amateur method. You can do it yourself. One is a professional method, which must be done by the repair shop.
First of all, amateur methods. This method is suitable for vehicles with hands directly touching the radiator. Wet the heat sink with water first. Pay attention to the small force of water and don't break the fragile heat sink. Then gently clean the dirt on the surface of the heat sink with a soft brush.
The professional method is to remove the radiator and treat the radiator surface with special cleaning agent until the radiator returns to the factory state.
What happens when the car is driving in m block?
It is often said that when driving an automatic car downhill, you can't drive D gear, otherwise it is not safe. What gear should I change? Some people say S gear, some people say M gear, some people say manual mode, some people say L gear. In fact, these statements have no reference significance, because the problem is simply not clear. It's all the same copy, which doesn't help readers at all. Today, let's talk about how to shift gears when an automatic car goes downhill.
Can't an automatic car shift into D gear when going downhill?
Because D gear tends to use high gear and low speed, it is easy to automatically rise to the highest gear when going downhill. If the ramp is long and steep, the car will run faster and faster under the action of gravity, and the power of the high-gear starting mechanism is extremely small, so it is difficult to curb the speed. At this time, it is necessary to step on the brakes frequently to control the speed. However, frequent braking will easily lead to overheating of the brakes, which will first affect the braking performance. The most direct performance is that the braking distance becomes longer. In severe cases, the brake pads will be ablated and the brakes will completely fail.
So we got the first conclusion:
(1) When going downhill, D gear can't control the speed, so you need to brake frequently. It's best not to use D gear.
(2) It is easy to control the speed of D gear when going downhill, and it is not necessary to step on the brakes frequently.
D gear can't control the speed. When you need to step on the brakes frequently, which gear should you change?
This is a mistake. It doesn't mean that you can control the speed immediately with S gear or M gear or manual mode. You should know this: the lower the gear of the gearbox, the greater the power of the engine, and the easier it is to suppress the speed. So when going downhill, D block can't stop the speed. Our aim should be to lower the gear and improve the power of the starting mechanism, so as to control the speed, rather than simply changing to a certain gear to solve the problem. For example, at present, the gearbox is in the sixth gear, so we must find ways to reduce it to the fifth gear or even the fourth gear to improve the power of the starting mechanism. This is our ultimate goal. Manual mode, S gear and M gear are all ways to achieve this goal.
So we got the second conclusion:
When going downhill, D gear can't control the speed, so you have to find a way to downshift and improve the power of the starting mechanism. The so-called S-gear, L-gear and M-gear, the ultimate goal is to reduce gears and improve the power of the starting mechanism, rather than saying that these gears have the function of downhill speed regulation.
What gear should I choose when going downhill? That depends on the function of each gear.
The gears of every car can't be exactly the same. Not every car has S, L, M and other gears. Therefore, we need to clearly understand the functions of each gear in order to choose freely. Let me briefly talk about several common automatic gears.
(1)S file
For most car companies, S gear is defined as a moving gear. After the gearbox is put into this gear position, it will shift gears in the logic of "low gear and high speed". For example, if D gear is equivalent to 5th gear at 2000 rpm, the transmission will shift to 4th gear at 3000 rpm after S gear is engaged. Therefore, the S gear can achieve the purpose of downshifting and improving the power of the starting mechanism.
However, under normal circumstances, the S-block will only be forced to downshift by one gear, so the effect of the S-block may not be obvious on steep slope sections.
(2)M gear
M generally means manual, so m generally means manual mode. But after the manual mode, you have to pull the gear lever back to force the downshift, otherwise the gearbox may not be able to downshift.
Many Japanese cars will automatically lower the gearbox to the default gear after you shift to M gear. For example, my car is in 4th gear by default. If you switch to manual mode when driving, and the gear is higher than the fourth gear, the gearbox will directly drop to the fourth gear. If the current gear is lower than 4th gear, the gearbox will limit the top gear to 4th gear.
But some cars are simpler and clearer. After entering the manual mode, the gear position remains unchanged, or the current gear position requires the driver to operate the shift lever to downshift.
(3) Left gear
L gear stands for low gear, but the settings of different manufacturers are different. Some manufacturers set the first gear, and the speed is too high to hang casually. Moreover, some manufacturers set the low gear, which can be hung when the speed is high. Generally speaking, SUVs and off-road vehicles are more inclined to set the first gear, and cars are more inclined to set the low gear. Please refer to the user manual for details.
(4) Digital gear
Some transmission shift panels will directly display numbers, such as 3, 2, 1 or D3 and D2, which all represent specific gears. For example, if you shift to third gear, as long as the current gear is higher than third gear, you will be forced to shift to third gear. When going downhill, we can choose according to the starting mechanism power of each gear. But now this kind of gearbox is rare.
(5)O/D gear
Some parking stations have O/D buttons. Although this button is not a specific gear, it can also play the role of forced downshift under certain circumstances.
Here, OD stands for Over Drive, which means overdrive, and refers to the gear with reduction ratio less than 1. For example, the fifth gear of a five-speed gearbox is generally an overspeed gear, and the fifth and sixth gears of a six-speed gearbox are overspeed gears. When the O/D button is pressed, the gearbox will be forced to exit the overdrive gear, which can also lower the gear. For example, if your car is a 6-speed gearbox, and 5th and 6th gears are overdrive gears, then when you press the O/D key while driving, the gearbox will be forced down to 4th gear.
It is best to slow down fully before shifting gears.
In many cases, shifting gears alone can't solve the problem, because many car owners have encountered such a situation: when going downhill, they also use low gear, but after shifting gears, they don't control the speed except for the increase of engine speed. Mainly because we didn't slow down enough before shifting gears.
Because when the vehicle speed is too high, the kinetic energy of the vehicle is also large, and it needs more resistance to slow down, and engine braking can't provide such a large resistance at all, so even if it is forced to downshift, it can't obtain obvious deceleration effect. Therefore, when you feel that D gear needs to be braked frequently to control the speed, you'd better slow down sufficiently before downshifting, so that the gear is easier to control.
In fact, no matter what gearbox car it is, it doesn't matter what gear it is when going downhill. It is important to understand where the danger is when going downhill and how to solve it. If you understand this, it doesn't matter what gear you want to change. Do I need to wear a mask when driving? @20 19