Mechanically telescopic device with three connection pipes

Abstract

The invention relates to the technical field of internal combustion engines and discloses a mechanically telescopic device with three connection tubes. The device comprises a gas inlet pipe, a gas compressor, an engine, a gas exhaust pipe, a turbine, a volume cavity, connecting pipes, a moving body, a moving plate and a spring, wherein one end of the moving body stretches into the first connecting pipe; the other end of the moving body is fixedly connected with the left wall surface of the moving plate to form a whole; and the right wall surface of the moving plate is connected with the right wall surface of the volume cavity through the spring. When the engine is in a low-speed working condition, the moving plate moves to the left wall surface of the volume cavity, the volume of the gas exhaust pipe is relatively small, the pulse energy can be fully utilized, the gas inlet pressure of the engine is relatively high, and the overall performance of the engine is relatively good; and when the engine is in a high-speed working condition, the moving plate moves to the right wall surface of the volume cavity, the gas exhaust volume is relatively large, the pumping loss is relatively low, and the overall performance of the engine is relatively good. The device is rational in design and simple in structure and is applied to a turbocharging system with a single turbine inlet.

Description

technical field [0001] The invention relates to a turbocharging system in the field of internal combustion engines, in particular to a three-connection pipe mechanical expansion device. 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 an exhaust pipe with a large volume, the structure of the exhaust pipe system is relatively simple, the pressure in the exhaust pipe is basically kept constant, the pressure is only related to the load and speed of the engine, different cylinder numbers The supercharging system of the...

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Problems solved by technology

[0003] After searching the existing technical literature, it was found that Chinese patent number ZL200410050996., patent name: a variable modular pulse conversion supercharging device for a turbocharged diesel engine, the patent technology provides a continuously variable volume of the exhaust pipe The device can better take into account the high and low speed conditions of the engine; but the change of the volume of the exhaust pipe is realized by moving the moving rod up and down, which requires adding a special control mechanism to control the movement of the moving rod , so that the supercharging system structure becomes more complicated

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