Gas path system with drawing mechanism

Abstract

The invention discloses a gas path system with a drawing mechanism and relates to the field of a mechanical design technology. The gas path system comprises a gas compressor, an engine, a turbine, connecting pipes, a valve base, a valve body, a volume chamber, a fixing body, penetration pipes, an elastic assembly, a baffle, a rotating body, a connecting plate and a fixing plate; one end of the rotating body stretches into a first penetration pipe and forms sealing contact with the wall surface of the first penetration pipe, the other end of the rotating body is fixed together with the baffle, one end of a second connecting pipe is connected with the exhaust pipe of the engine, and the other end of the second connecting pipe is connected with the volume chamber. When the exhaust pipe of the engine is relatively high in pressure, a butterfly valve is driven to rotate clockwise by the rotating body, so that the air exhaust recirculation rate of the engine is relatively great and the detonation pressure of the engine is relatively lower; when the exhaust pipe of the engine is relatively low in pressure, the butterfly valve is driven to rotate anticlockwise by the rotating body, so that the air exhaust recirculation rate of the engine is relatively low and the fuel consumption of the engine is also relatively lower. The gas path system is reasonable in design and simple in structure, thus the gas path system is applied to the air exhaust recirculation system of a supercharged 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 system with a stretching mechanism. 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. With the consumption of petroleum products in the world rising year by year, international oil prices remain high, and the economy of diesel vehicles has become 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 produce...

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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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