Parallel gas path system with switching mechanism

Abstract

A parallel gas path system with a switching mechanism in the technical field of internal combustion engines comprises gas compressors, a gas inlet tube, an engine, an exhaust tube, turbines, a containing cavity, connecting tubes, a moving body, a spring and a through tube. The moving body is mounted in the containing cavity and is in sealing contact with the inner wall surface of the containing cavity, the through tube penetrates through the right wall surface and the left wall surface of the moving body, and the lower wall surface of the moving body is connected with the lower wall surface of the containing cavity. When the engine is in a low-speed working condition, the moving body moves upwards, only the first gas compressor and the first turbine work, pulse energy is fully utilized, inlet pressure of the engine is high, and the performance of the whole engine is excellent; and when the engine is in a high-speed working condition, the moving body moves downwards, the first gas compressor, the second gas compressor, the first turbine and the second turbine work simultaneously, pumping loss of the engine is less, and the performance of the whole engine is excellent. The parallel gas path system with the switching mechanism is reasonable in design, simple in structure and applicable to a turbo-charging system with two turbochargers.

Description

technical field [0001] The invention relates to a turbocharging system in the field of internal combustion engines, in particular to a parallel air circuit system with a switching mechanism. Background technique [0002] With the development of society and the improvement of environmental protection requirements, the application of engine supercharging technology is becoming more and more extensive. Most of the engines with medium and high power adopt turbocharging technology to improve power and reduce fuel consumption. The two basic types of turbocharging systems are constant pressure supercharging system and pulse supercharging system. Constant-pressure supercharging system, each cylinder shares a large-volume exhaust pipe, the structure of the exhaust pipe system is relatively simple, the equivalent flow area of ​​the turbine is relatively large, the pressure in the exhaust pipe is basically kept constant, and the pressure is only related to the load of the engine It is...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200820226936.6, patent name: a compressor parallel supercharging device for a turbocharger, this patent technology provides a device with a variable compressor shell, It can better take into account the high and low speed conditions of the engine; but the change of its housing requires a special control mechanism, which makes the structure of the booster system more complicated

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