Pneumatic device with air inflow as air source

Abstract

A pneumatic device with air inflow as an air source belongs to the technical field of machinery design and comprises a compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotating shaft, an accommodating cavity, a fixing body, through pipes, an elastic component, a separation plate, a rotation body and a connection plate. One end of the rotation body extends into a first through pipe and has a sealed contact with the wall surface of the first through pipe; the other end of the rotation body is fixedly connected with the separation plate; one end of a third connecting pipe is communicated with an air inlet pipe of the engine; and the other end of the third connecting pipe passes through the fixing body to be communicated with the first through pipe. When an air inlet pipe of the engine possesses high pressure, the rotating body drives valve body to clockwise rotate; large recirculation efficiency of the engine is achieved; low engine detonation pressure is acquired; when the air inlet pipe of the engine possesses low pressure, the rotating body drives valve body to counterclockwise rotate; low recirculation efficiency of the engine is achieved; and low engine oil consumption is acquired. The pneumatic device with air inflow as the air source is rationally designed, simply structured and suitable for exhaust recirculation system of the engine.

Description

Technical field [0001] The invention relates to an exhaust gas recirculation system in the technical field of mechanical design, in particular to a pneumatic device with intake air as a gas source. Background technique [0002] Engine harmful emissions are a major source of air pollution. With the increasing importance of environmental protection issues, the goal of reducing harmful emissions from engines has become an important direction for engine development in the world today. As the consumption of petroleum products in the world increases year by year, international oil prices remain high, and the economy of diesel vehicles is becoming increasingly prominent, which makes diesel engines occupy an increasingly important position in vehicle power. Therefore, it is the first task for the designers of diesel engines to carry out research on the control methods of harmful emissions from diesel engines. The exhaust gas recirculation system returns a small part of the exhaust gas p...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200410063439.5, patent name: electronic exhaust gas recirculation gas control device, this patent technology provides a device for controlling the exhaust gas recirculation rate of the engine, which can better Taking into account the medium and high speed conditions of the engine; but the change of the exhaust gas recirculation rate is realized through a special control structure, which makes the control system more complicated

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