Mechanical valve body lift control system

Abstract

The invention relates to a mechanical valve body lift control system and belongs to the technical field of machine design. The mechanical valve body lift control system comprises a compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotary shaft, a volume cavity, a rotating body and an elastic part. The rotating body is mounted in the volume cavity and in seal contact with the inner wall face of the volume cavity. The left wall face of a partition is connected with the rotating body through the elastic part. The two ends of the first connecting pipe are respectively communicated with a volume cavity air inlet and a turbine exhaust pipe. The two ends of the third connecting pipe are respectively communicated with an engine exhaust pipe and the volume cavity on the right of the partition. When the pressure of an engine air inlet pipe is high, the rotating body drives the valve body to rotate clockwise, exhaust recycling rate of the engine is high, and engine detonation pressure is low; when the pressure of the engine air inlet pipe is low, the rotating body drives the valve body to rotate anticlockwise, the exhaust recycling rate of the engine is low, and oil consumption of the engine is low. The mechanical valve body lift control system is reasonable in design, simple in structure and suitable for the exhaust recycling system of the 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 valve body lift mechanical control system. 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 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 produced...

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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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