Communication device for circulating air course

Abstract

The invention discloses a communication device for a circulating air course in the technical field of internal combustion engines. The device comprises air compressors, an admission pipe, an engine, an exhaust pipe, turbines, a volume cavity, connecting pipes, a moving body, a spring and a through pipe, wherein the moving body is arranged in the volume cavity, and contacts the inner wall surface of the volume cavity in a sealed way; the through pipe penetrates through the left and right wall surfaces of the moving body; and the upper wall surface of the moving body is connected with the upper wall surface of the volume cavity through the spring. When the engine is under a low speed working condition, the moving body moves downwards, only the first air compressor and the first turbine work, pulse energy is fully utilized, the admission pressure of the engine is high, and the overall performance of the engine is high; and when the engine is under a high speed working condition, the moving body moves upwards, the first and second air compressors and the first and second turbines work at the same time, the pumping loss of the engine is low, and the overall performance of the engine is high. The device is rational in design, simple in structure and applicable to a turbocharging 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 communication device for a flow path. 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 related to the ro...

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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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