Differential pressure type pneumatic adjusting rotating device

Abstract

The invention provides a differential pressure type pneumatic adjusting rotating device in the technical field of mechanical design. The differential pressure type pneumatic adjusting rotating device comprises a gas compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotating shaft, a containing cavity, a fixed body, penetrating pipes, a partition board, a rotating body and a connecting board. One end of the rotating body extends into the first penetrating pipe and is in sealing contact with the wall face of the first penetrating pipe, the other end of the rotating body is fixedly combined with the partition board, the two ends of the first connecting pipe are communicated with a gas inlet of the containing cavity and a gas exhausting pipe of the turbine respectively, and the two ends of the second connecting pipe are communicated with a gas outlet of the containing cavity and a gas inlet pipe of the gas compressor respectively. When the pressure of the gas inlet pipe of the engine is large, the rotating body drives the valve body to rotate clockwise, the low-pressure gas exhausting recirculation rate of the engine is large, and the detonation pressure of the engine is low; when the pressure of the gas inlet pipe of the engine is small, the rotating body drives the valve body to rotate anticlockwise, the low-pressure gas exhausting recirculation rate of the engine is small, and the oil consumption of the engine is low. The differential pressure type pneumatic adjusting rotating device is reasonable in design, simple in structure, and suitable for a low-pressure gas exhausting recirculation system of a supercharged engine.

Description

technical field [0001] The invention relates to a low-pressure exhaust gas recirculation system in the technical field of mechanical design, in particular to a differential-pressure pneumatic regulating rotary 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. The low-pressure exhaust gas recirculation system is to send a...

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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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