Supercharger and ultrahigh-pressure common rail system with supercharger

Abstract

The invention belongs to the technical field of high-pressure injection, and particularly relates to a supercharger and an ultrahigh-pressure common rail system with the supercharger. The superchargercan achieve ultrahigh-pressure oil injection, and the variable-oil-injection-rate high-pressure injection can be achieved by using the common rail system. On the one hand, high-pressure injection canimprove the atomization quality, so that the ignition delay period is shortened, but the problem that the fuel injection amount is excessively large possibly occurs. By means of the ultrahigh-pressure common rail system, the oil injection rate can be adjusted to control the oil amount of premixed combustion, and more reasonable gas mixture time, and spatial distribution and the like are formed, so that an oil injection rate curve is controllable. The curve is matched with the change of the rotating speed and load of a diesel engine, so that the combustion temperature and the pressure rise rate are controlled, and the purpose of optimizing the full-work condition is achieved.

Description

technical field [0001] The invention belongs to the technical field of high-pressure injection, and in particular relates to a supercharger and an ultrahigh-pressure common rail system containing the supercharger. Background technique [0002] The combustion process of a diesel engine is mainly controlled by the fuel injection characteristics, especially the fuel injection pressure, which greatly affects the in-cylinder injection atomization and fuel-air mixing process, and then has a direct impact on the overall performance of the diesel engine. After the injection pressure is increased, the atomization quality of the sprayed oil beam is improved, the Sauter average diameter of the oil droplet particles is reduced, the number is increased, and the surface area is increased, which is conducive to improving the mixing with air and accelerating the evaporation of oil droplets, thereby Reduce soot emissions, but also increase NOx emissions. The test shows that: under the fuel ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the structural and technical deficiencies of the conventional high-pressure common rail system, provide a supercharger capable of achieving ultra-high pressure, and constitute Ultra-high pressure common rail system, using this system to achieve ultra-high pressure injection, solve the problems of traditional supercharger pressure fluctuations, large control oil consumption and low work efficiency

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