The diesel engine ignites when the homogenous mixed gas pressure is burned, instead of the current side-injection and side-fired diffusion combustion mode, so that the exhaust gas emission of the diesel engine reaches a minimum, especially the smoke emission and the NOx emission. The current theory of homogenous mixed gas pressure ignition is now being implemented. Once this new theory is applied in practice, it can be predicted that the future engine will be more efficient and clean, and the car will be safer and environmentally friendly.
In homogeneous combustion, it has the same air-fuel ratio as conventional jet engines. Its excellent economic performance is mainly manifested in stratified combustion at part load. The combustible mixture is only distributed around the spark plug, ie, the air-fuel ratio is 14.71. The gas mixture is concentrated around the spark plug, and the rest of the combustion chamber is pure air. The size range of the gas mixture precisely reflects the demand for instantaneous engine power. In the stratified combustion, fuel is not injected until the compression stroke, and the oil mist directly enters the combustion chamber, and the injection occurs immediately before the ignition. When the stratified combustion reaches 4, it can be seen how much fuel is saved in the engine at medium and low speeds. Another advantage is that the air layer insulates heat during combustion, reducing heat transfer to the cylinder walls, thereby reducing heat loss and increasing engine thermal efficiency. Perfect engine aftertreatment enables emissions to meet European standards. Technology-oriented fuel consumption is reduced, power is greatly enhanced. The advantage of fuel economy at partial load is reflected in the stop-and-go traffic conditions in the city. For example, Bosch developed the Motronic MED7 gasoline direct injection system, Audi developed the FSI system, Mercedes-Benz developed the CGI system, and Fiat developed the JTS system. Although the names are different, they all represent the direct injection of gasoline. Application and Development of Modern Fuel Direct Injection Combustion Fuel injectors of modern advanced diesel engine direct injection combustion systems are installed in cylinders and fuel is injected directly into the cylinders. The mixture is well formed and burns completely, but the installation requirements are high and the manufacturing process is more complicated. The modern direct-injection diesel engine can run at a high speed of 40005000 r/min, which fully satisfies the matching needs from heavy, medium, and light trucks to cars. A few years ago, direct injection technology was still a myth in gasoline engines. Engine experts found that using rarefied gas combustion technology on gasoline engines would greatly improve the economy and power of the engine. However, there has been no better way. The emergence of direct injection technology has undoubtedly brought a dawn to solving this problem. Direct injection technology uses extremely high fuel pressure and cylinder pressure to ensure the realization of the rarefied gas combustion, it will undoubtedly become the future development direction of the engine. At present, some automobile manufacturers are putting GDI technology into the actual manufacturing application process. The original idea for the development of direct injection technology was that in most cases, the engine's air-fuel ratio could be adjusted to a more lean state than that obtained by chemical calculations without negatively affecting engine performance. However, there are still its limitations. It is difficult to ignite the rarefied gas mixture, and it will also produce corresponding emissions. Its main component is NOX.
With direct injection technology, the fuel enters the cylinder in a fine droplet mist, not as a vapor. This means that when the fuel mist absorbs heat and becomes flammable vapor, it actually cools the cylinder of the engine. This cooling reduces the engine's need for octane, so its compression ratio can be increased. And just like diesel, using a higher compression ratio can increase fuel efficiency. Another advantage of using GDI technology is that it can accelerate the combustion of oil and gas mixture, which makes GDI engine can be well adapted to the exhaust gas recirculation process compared with the traditional carburetor injection engine. For example, on a Mitsubishi engine, if the engine combustion is unstable during idling, the engine may operate smoothly at an air-fuel ratio of 401 (if the exhaust gas recirculation EGR technology is used, the engine air-fuel ratio may be increased to. The key to determining a very thin gas mixture is to find a reliable way to ignite it.This requires that the concentration of the mixture gas near the spark plug gap is large enough to ignite.Because the flame flame core is better than the spark plug. The size of the gap is much larger, and once burned the flame spreads into the lean gas area of ​​the combustion chamber.
Sodium hydrosulfite is widely used in the textile industry for reducing dyeing, reducing cleaning, printing and decoloring, and for bleaching silk, wool, nylon and other fabrics. Because it does not contain heavy metals, the bleached fabric has bright color and is not easy to fade. In terms of various substances, sodium silicate can also be used for food bleaching, such as gelatin, sucrose, honey, etc., soap, animal (vegetable) oil, bamboo, porcelain clay, etc. Sodium hydroxide can also be used in organic synthesis, such as reducing agent or bleaching agent in the production of dyes and medicines. It is the most suitable bleaching agent for wood pulp and papermaking. Moreover, many heavy metal ions such as Pb2+ and Bi3+ can be reduced to metals in water treatment and pollution control, and it can also be used to preserve food and fruits. However, due to the many dangers of sosso, many of its uses tend to be replaced by thiourea dioxide, which is safer and easier to store and transport.
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