Pressure unbalanced type valve body lifting adjusting mechanism

Abstract

The invention discloses a pressure unbalanced type valve body lifting adjusting mechanism which comprises a gas compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotary shaft, volume cavities and a rotator. The rotator is installed in the volume cavity and is in sealed contact with the inner wall face of the volume cavity, the two ends of the third connecting pipe are communicated with an exhaust pipe of the engine and the volume cavity formed in the right side of a partition board respectively, and the two ends of the fourth connecting pipe are communicated with a gas inlet pipe of the engine and the volume cavity at the right side of the partition board respectively. When the pressure of the gas inlet pipe of the engine is larger than the pressure of the exhaust pipe of the engine, the rotator drives the valve body to rotate clockwise, and the exhaust recycling rate of the engine is large; when the pressure of the gas inlet pipe of the engine is smaller than the pressure of the exhaust pipe of the engine, the rotator drives the valve body to rotate anticlockwise, and the exhausting recycling rate of the engine is small. The pressure unbalanced type valve body lifting adjusting mechanism is reasonable in design, simple in structure and suitable for an exhausting recycling 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 pressure unbalanced valve body lift adjustment 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. As the consumption of petroleum products in the world increases year by year, international oil prices remain high, and the economy of diesel vehicles is becoming increasingly prominent, which makes diesel engines occupy an increasingly important position in vehicle power. Therefore, it is the primary task of the diesel engine designer to carry out the research on the control method of the harmful emissions of the diesel engine. The exhaust gas recirculation system returns a small part of the e...

AI Technical Summary

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

Images