A patent drawing of steam-water injection engine
However, just one year later, FAW applied for the invention patent of "water jet engine", which suddenly made people daydream again and again. Different from the absurd water-hydrogen fuel vehicle (not the fuel cell vehicle), this technology is a serious "black technology". Today, let's talk about how FAW "watered" the engine.
▲ What is the use of a water jet engine?
The so-called water jet engine actually adds a high-pressure water jet system to the traditional internal combustion engine, which is mainly composed of water tank, high-pressure water pump, manifold injection system, in-cylinder injection system and ECU control module.
Blue is the intake water spray system, which can be circulated.
From the structural point of view, in fact, the main design of water spraying and oil spraying is similar, and both of them spray liquid into the cylinder through the high-pressure injection system, and the difference lies in the function. The purpose of fuel injection is to ignite combustion and make the engine rotate; The purpose of water spraying is to cool the intake air and oil-gas mixture, suppress knocking, and then improve the compression ratio and reduce fuel consumption.
Red is the in-cylinder water spraying system, and the water tank supplies water.
At present, because of the high temperature and high pressure of the intake air, the mainstream turbocharged engine can't reduce the intake air temperature under intense working conditions even with the water-cooled intercooler, which is very unfavorable for suppressing knocking, so the general compression ratio is10/-11. In order to suppress knocking, it is too passive to only improve the fuel label, and spraying water on the "breathing system" of the engine is undoubtedly a very effective solution.
▲ Why is the water jet engine not afraid of "water inflow"?
Accord stall door: the engine sucks condensed water.
Traditional internal combustion engines are most afraid of water. For example, the high-speed "flameout door" of Honda Accord 1.5T engine is caused by the big foot throttle, which causes the engine to suck condensed water into the combustion chamber, thus causing the engine start protection mechanism to stall. Why does FAW spray water into the engine, but it is not afraid of water?
Water atomized by high-pressure spray is not easy to condense.
In fact, the reason is very simple. The water sprayed by the high-pressure water pump is highly atomized. After entering the combustion chamber, it will quickly absorb heat and become steam, which not only reduces the temperature, but also will not adhere to the cylinder wall or piston, causing rust or affecting lubrication.
Of course, if it is really the kind of high-performance car that is not bad for money, such as F 1 racing car and super sports car, it is still too slow to absorb heat by spraying water, and ethanol can be sprayed instead. It makes sense to use Erguotou. Ethanol can volatilize and absorb heat at normal temperature, and the gasification speed is faster at high temperature, and ethanol can also be burned, which can further improve the power output.
2 1 1 and 2 1 are electric heating modules.
According to the patent drawings, the water injection system applied by FAW is also equipped with a temperature control module to prevent the water tank from freezing. When driving for the first time, the car will melt the ice in the water tank through the electric heating module and engine heat, and keep the water in the water tank from freezing through the temperature sensor, so that the system can be used normally in extremely cold areas.
▲ BMW has also played the "water" engine.
BMW M4? Global Telecommunication System (global telecommunication system)
Speaking of water jet engines, it was not first created by FAW, before BMW M4? On GTS, 3.0T with code name S55? The L6 engine is equipped with an original water spray system WIS (water? Injection? Previously, this technology was only used in some racing cars and extreme performance modified cars.
Official magic change S55? 3.0T？ L6 engine
WIS water injection system used in BMW M4 was developed with the assistance of the famous Bosch company in Germany, which can make the engine run stably under higher compression ratio, higher AG supercharging value and more intense working conditions. In terms of data, the official "magic" S55 engine has a maximum power of 500 HP and a peak torque of 600n·m, which is 69 HP /50 Nm more than the ordinary version.
Does Hongqi S9 need water?
Of course, but all water jet engines need to add water in addition to refueling during daily driving, just like the national six diesel vehicles need to add extra urea now. I believe that the future FAW Hongqi "mixed water vehicle" is no exception.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.