Differential-pressure type gas valve lift adjusting mechanism

Abstract

The invention provides a differential-pressure type gas valve lift adjusting mechanism and belongs to the technical field of mechanical design. The differential-pressure type gas valve lift adjusting mechanism comprises a gas compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotary shaft, a containing cavity, a fixed body, penetrating pipes, an elastic component, a separating board, a rotary body and a connecting board. One end of the rotary body extends into the first penetrating pipe and makes sealing contact with the wall face of the first penetrating pipe, the other end of the rotary body is fixedly connected with the separating board, one end of the third connecting pipe is communicated with an engine gas inlet pipe, and the other end of the third connecting pipe penetrates through the outer wall face of the containing cavity and then is communicated with the containing cavity. When the pressure of the engine gas inlet pipe is high, the valve body is driven by the rotary body to rotate in the clockwise direction, the exhaust gas recirculation rate of the engine is high, and the detonation pressure of the engine is low; when the pressure of the engine gas inlet pipe is low, the valve body is driven by the rotary body to rotate in the anticlockwise direction, the exhaust gas recirculation rate of the engine is low, and the fuel consumption of the engine is low. The differential-pressure type gas valve lift adjusting mechanism is reasonable in design, simple in structure and suitable for an exhaust gas 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 differential pressure valve lift adjustment mechanism. 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 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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