Differential pressure type mechanical adjusting system

Abstract

The invention belongs to the technical field of mechanical design and discloses a differential pressure type mechanical adjusting system. The differential pressure type mechanical adjusting system comprises an air inlet pipe, an engine, an air exhaust pipe, a compressor, a turbine, a connecting pipe, a volume chamber, a moving body and a spring, wherein the connecting pipe is communicated with the wall face of the volume chamber, the moving body is installed inside the volume chamber and contacts with the inner wall face of the volume chamber in a sealing mode, a penetrating pipe penetrates through the left wall face and the right wall face of the moving body, and two ends of the spring are connected with an upper wall face of the moving body and an upper wall face of the volume chamber respectively. When the engine is kept under the intermediate and low speed working conditions, the moving body moves upwards inside the volume chamber, the waste gas recirculation rate is high, exhaust temperatures of all cylinders of the engine are low, the whole machine performance is good; and when the engine is kept under the high speed working condition, the moving body moves downwards inside the volume chamber, the waste gas recirculation rate is low, the dynamic performance of the engine is good, and the whole machine performance is good. The system is reasonable in design, simple in structure and applicable to waste gas recirculation systems with turbochargers.

Description

technical field [0001] The invention relates to an exhaust gas recirculation system in the field of mechanical design, in particular to a differential pressure mechanical adjustment system with a turbocharger. 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 exhaus...

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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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