"In terms of engines, Germany's engines are currently the most mature. They have used a 1500-horsepower diesel engine on the Leopard-2 tank and have been running stably for many years, whether it is accumulated experience or real tests,
Their tank diesel engines have already withstood." Qin Zhenhua said: "Our domestic has been targeting German diesel engines in recent years. Unfortunately, our industrial foundation is not enough, so if we want to directly survey and map imitate it, it is
It cannot be achieved.”
"At the same time, for us, this diesel engine is not the most perfect. One of its important shortcomings is its size." If someone else said that the engine experts around would look down on it, you said that they have shortcomings.
,You're going to make one!
Qin Zhenhua has made it happen now, so he naturally has the confidence.
"They use a V-shaped 90-degree cylinder layout, which leads to a large volume. With the heat dissipation, the overall power pack is almost close to four cubic meters. Because of the large power system, the power behind the tank is powered by the tank
The cabin is long, so the tank will gain a lot of weight, while our volume is only two cubic meters, saving half of the volume. The length of the entire power cabin can be shortened by about one meter, and the weight of the tank can be saved by three.
Four tons.”
The Leopard-2 tank is very long, so it uses seven pairs of load-bearing wheels. The length behind is completely prepared for the engine. If the engine is short, the power compartment can be shortened, so that the tank can weigh itself down.
This is not just what I thought of. In Israel, that is what French experts said at that international conference.
Mr. Zhang nodded: "Yes, what you said makes sense."
"At the same time, in order to achieve this power, the Germans used the method of increasing the speed. When the speed rises, the heat will increase. In order to dissipate heat, a larger radiator must be used. On the one hand, the engine volume will be made more
Huge, on the other hand, consumes more power. Although Leopard-2 has 1,500 horsepower, more than 200 horsepower is wasted in the heat dissipation."
This is the easiest way to increase power by increasing the speed, but the consequences are also many. Take the current example, heat dissipation is a big problem. It was originally increased to 1,500 horsepower, but as a result, heat dissipation is hard to achieve.
The raw land consumes so much, but it is still equivalent to an engine with 1,200 horsepower.
Different manufacturers have different labels. If you buy BMW, you can find that BMW's engine data is very low, even much lower than the engine labels of some domestic cars. Some are even more difficult because of their low power.
It is called turbo pressure relief.
But, so what? When you really drive, BMW is still speeding up quickly. Why?
Because many car companies, in order to make their engines look tall and high, they are marked with the test power on the bench, and even the power for heat dissipation is not counted. BMW doesn't care about these data, and the ones marked by them are all transmitted
The real power to the wheels. In this way, there is a big gap.
The Leopard-2's 1,500-horsepower engine sounds very awesome, but in fact, it still has many shortcomings.
Qin Zhenhua is probably the only one who dares to evaluate the world's most advanced tank engines in this way.
Many engine experts present frowned when they heard this, and some nodded to express their agreement.
"This actually illustrates a problem. It is quite difficult to achieve such a high power output. Germany, an industrial powerhouse, relies on increasing the speed, which has brought many side effects, and the United States is also an industrial powerhouse.
However, bypassing this technical difficulty, I took off the engine of the plane and used it directly."
Americans use gas turbines.
In this era, gas turbines were very beneficial, with small parts, easy to start, not affected by the weather, small size and strong power, and were used in many aspects, such as warships, Britain began to promote all gas turbineization.
Because the United States felt that it was not easy to get around the piston engine, it took the gas turbine road. This road was very fast, after all, where was their industrial foundation?
"They directly avoided this problem and developed an engine with enough power, but the disadvantage of gas turbines is that they are too expensive." Qin Zhenhua said: "It is not only that the purchase price is high when equipped, but when used, it
The fuel burned is not something that ordinary troops can afford, and the fuel consumption rate is several times that of ordinary tanks."
Gas turbines can actually use a variety of fuels. Take marine gas turbines for example. In many cases, the worst-quality heavy oil is burned. However, for tank engines, generally, the ones added are actually aviation fuel.
Airlines fuel is all money, many times more expensive than diesel. When oil is extracted, it is the best type of oil.
"These are two routes that have achieved 1,500 horsepower power." Qin Zhenhua said as he walked: "There are also mixed solutions for developing, such as the French, using a turbo engine and piston engine."
It is not surprising that the French have this wonderful idea. They have always been weird. Now they are planning to learn from others' strengths. Their approach they use is thinking that they combine the two advantages and disadvantages.
Small size, strong power, and fuel-efficient, but this method is so complicated!
A good engine must be a simple engine. The complex structure means an increase in failure rate. However, the French's technology was originally not as good as Germany and the United States. If they wanted to achieve this power output, they could only
Take this path.
"Also, Japan on the other side of our shore." Qin Zhenhua said: "In order to fight against Soviet tanks, they are also developing third-generation tanks. The technical route they take is the two-stroke diesel engine plan, and this plan has advantages and disadvantages.
of."
Normal vehicle engines are all four-stroke, with air intake compression and exhaust, pistons back and forth twice, and crankshaft turns two turns, that is, the engine turns two turns and sprays oil once, and the two-stroke diesel engine is placed in one
Completed within the ring, that is, at the same speed, it does two work so that the power can be doubled.
In fact, due to various problems, it is about 1.6 times. Moreover, for this reason, the fuel consumption of two-stroke diesel engines is twice that of four-strokes.
Just like a motorcycle, 50 and 60, the fuel consumption is not low. When it comes to 70 motorcycles, it becomes the king of fuel saving because 70 motorcycles have four-strokes. They have high displacement and high power, which is even more fuel-efficient.
The Japanese are just a shortcut to achieve power improvement as soon as possible, but in fact, it is not the most suitable one.
Qin Zhenhua gave a guide to the country and spoke passionately, saying all the major technical routes in the world. At this time, the engine test workshop had arrived.
"So, what about our technical route?" Mr. Zhang entered the door, looked at the diesel engine from a distance, and asked Qin Zhenhua.