Exhaust back pressure and environmental pressure self-adaption type mechanical regulation device

Abstract

An exhaust back pressure and environmental pressure self-adaption type mechanical regulation device in the technical field of internal combustion engines comprises a compressor, a turbo, an engine, connecting pipes, a volume cavity, a moving body, a through pipe and elastic parts, both ends of the first connecting pipe are respectively communicated with an engine exhaust pipe and the upper wall of the volume cavity, one end of the second connecting pipe and one end of the third connecting pipe are communicated with the lower wall of the volume cavity, and the through pipe runs through the upper and lower walls of the moving body. In the process of engine operation, the moving body can move to the left and the right in the volume cavity; under the plateau condition, the pressure on the right side of the moving body is low, as a result, the moving body moves to the right, consequently, the first connecting pipe cannot be communicated with the second connecting pipe, the air intake of the engine is large, and the power is high; under the plain condition, the pressure on the right side of the moving body is high, as a result, the moving body moves to the left, consequently, the first connecting pipe is communicated with the second connecting pipe, the air intake of the engine is small, and the bursting pressure of each cylinder is low. The design of the exhaust back pressure and environmental pressure self-adaption type mechanical regulation device is reasonable, the structure is simple, and the exhaust back pressure and environmental pressure self-adaption type mechanical regulation device is applicable to the turbocharging systems of engines.

Description

technical field [0001] The invention relates to an exhaust system in the field of internal combustion engines, in particular to an adaptive mechanical adjustment device for exhaust back pressure and ambient pressure of a supercharged engine. Background technique [0002] With the development of modern society, people have higher and higher requirements on the power and economy of the engine. In the case of a certain displacement, the most effective way to increase the output power of the engine is to provide more fuel for combustion. It is easy to provide more fuel to the cylinder through the injector, but it is not so easy to provide the amount of air to match the increased amount of fuel at the same time; The effect is poor. When the fuel injection volume is constant and the cylinder air intake volume is large, the combustion is better, and the fuel consumption and emissions are lower. The traditional naturally aspirated engine completely relies on the vacuum formed in ...

AI Technical Summary

Problems solved by technology

However, none of the existing turbocharging systems can take into account the plateau working conditions and plain working conditions of the engine well.

[0003] After searching the existing technical literature, it was found that Chinese patent number ZL200410050996.3, patent name: a variable modular pulse conversion supercharging device for a turbocharged diesel engine, the patented technology provides an exhaust device in the exhaust pipe The device with continuously variable volume can better take into account the plateau working conditions and plain working conditions of the engine; but the change of the exhaust volume in the exhaust pipe is realized by moving the moving rod up and down, which requires an additional A special control mechanism is used to control the movement of the moving rod, so that the structure of the booster system becomes more complicated, and the sealing of the exhaust pipe system is also poor under high temperature conditions.

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