Pneumatic pipeline circulation area variable apparatus

Abstract

A pneumatic pipeline circulation area variable apparatus 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 second connecting pipe is communicated with an air inlet pipe of the engine; and the other end of the second connecting pipe passes through the fixing body to be communicated with the first through pipe. When the air inlet pipe of the engine possesses high pressure, the rotating body drives a butterfly valve to clockwise rotate; large exhausting and 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 the butterfly valve to counterclockwise rotate; low exhausting and recirculation efficiency of the engine is achieved; and low engine oil consumption is acquired. The pneumatic pipeline circulation area variable apparatus 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 pipeline flow area variable device. Background technique [0002] Harmful emissions from engines are a major source of air pollution. With the increasing importance of environmental protection, the goal of reducing harmful emissions from engines has become an important direction for engine development in the world today. With the world's consumption of petroleum products increasing year by year, international oil prices remain high, and the economy of diesel vehicles is becoming more and more prominent, which makes diesel engines occupy an increasingly important position in vehicle power. Therefore, it is the primary task of diesel engine designers to carry out research on the control methods of harmful emissions from diesel engines. Exhaust gas recirculation system is to send a small part of the exhaust gas produced b...

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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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