Military vehicles can run when the water is particularly deep. What is the reason?

The touching situation in this flood in Henan has been wave after wave, especially when military vehicles drive into the flood that is about to engulf the window, and the slogan "Adversity sees the truth" is posted on the side of the car, which makes people have mixed feelings.

Apart from impulsiveness, I think many people have the same question as me. Why can military vehicles run when the water is particularly deep, but conventional vehicles can't? I will share this knowledge with you under my various search materials.

0 1. Military vehicles have high requirements, and deep wading is one of their high specifications.

The research and development of military vehicles all over the world is not a one-off event. We see that the military vehicle seems to be quite simple in structure, with no warmth or technology at all. But in practice, iron and simple military vehicles are the most demanding.

First of all, talk about waterproof. Military vehicles are highly waterproof. Take Warrior as an example. The minimum wading depth of this car should be more than 0.75 meters, and the water with a depth of one meter can only make the cabin slightly seep, that is, the cabin is super waterproof. Every military vehicle should stop sealing the engine room before delivery. After closing the engine room partition, you should wade for one meter to see if it can't meet the requirements, and those who fail will be eliminated.

Secondly, military vehicles also have a very strong ability to resist bad weather, or take the warriors as an example. When leaving the factory, each car should be parked at minus 4 1 degree for 24 hours and started within 45 minutes, only three times. If you don't start, you will only be eliminated.

02. All military vehicles use diesel engines, which can improve the wading ability.

Diesel engine and gasoline engine have different working principles, so diesel engine is much better than gasoline engine when driving in water.

First of all, diesel vehicles do not need electronic ignition, and there are few electronic auxiliary parts.

Diesel vehicles do not need ignition installation. It uses compressed air to raise the temperature inside the starter. After compressing the air in the cylinder, the temperature reaches the level that diesel can spontaneously ignite, and after spraying the atomized mixture of diesel and air, it goes out to do work. This also makes it clear that it can better avoid being submerged without installing an additional ignition device, and its own military vehicles need to reduce the existence of electrical equipment. After all, more electrical appliances are prone to problems. Military vehicles, reliability is the first.

Secondly, diesel vehicles adopt compression ignition technology, which can effectively avoid suffocation.

As mentioned above, diesel vehicles are supercharged step by step, and when the pressure is high, the exhaust volume will be large, which is why we often hear the protruding exhaust sound of diesel four-wheeled vehicles. When the exhaust pressure is high, it is difficult to choke water and the wading ability will be further improved. In addition, due to the high pressure in the cylinder and good sealing performance, the starter is not easy to enter water.

However, it should be noted that due to the high pressure, once the diesel engine really enters the water, the loss will definitely be higher than that of ordinary gasoline vehicles.

03. Military vehicles think about the wading environment, and the air intake is usually high.

Military vehicles have very high requirements for vehicle applicability and off-road performance. Because military vehicles not only transport personnel, but also transport materials, medical supplies and daily necessities, in addition to towing artillery, rockets and other equipment, as well as driving on various complicated roads, snow fields, rivers and beaches. Things to consider must be comprehensive.

Generally speaking, in order to cope with the wading environment, military vehicles will set the air inlet very high, and some will even be on the roof. In order to avoid the water from the air inlet to the starter when the vehicle wades, this has never been thought of by military vehicles. Many off-road vehicles of civilian players will also think about wading and change the air intake to a very high position.

However, some people think that as long as the air intake is large, you can wade at will. Actually, they are not. Because there are still many parts in the car that are afraid of water, these military vehicles have all thought about it.

Ordinary car engine room is not waterproof, and objects such as ECU computer board, battery and fuse box are easy to get water. But the engine room of military vehicles is waterproof and will not be damaged by water. In addition, the gearbox is actually a component that is easy to get water. Because the gearbox has air holes to ensure the internal and external pressure, military vehicles are equipped with receivers on the air holes, which are very high and difficult to get out of the water.

In addition, military vehicles generally have two fans, both clutch fans. When fans are not needed to run, they stop running. When wading, the fan stops running, which is also conducive to ensuring the safety of vehicles.

The design of military vehicles is very comprehensive. It's not why military vehicles can wade. Many parts need strong performance after wading, otherwise the engine can't enter the water, and military vehicles can't really run smoothly in the water.