Exhaust gas recirculation valve with high structural strength

Abstract

The invention discloses a high-structural-strength exhaust gas recirculation valve which comprises a valve body internally provided with an air inlet flow channel, an exhaust flow channel and a containing cavity. A groove; a valve plate; the opening and closing unit is used for driving the valve plate to turn over, open and close in the groove; the locking unit is used for fixing the movable end of the valve plate; the sliding plate is driven by a linear actuating unit to be movably mounted in the accommodating cavity; a pair of connecting rods; in daily use, according to the technical scheme, when the valve plate needs to be closed, the linear actuating unit drives the sliding plate to be close to the valve plate, the connecting unit pushes the pair of connecting rods to rotate around the hinge points, the included angle between the connecting rods is increased, and therefore the valve plate can be closed. The valve plate is pushed to rotate around the hinge point of the valve plate and the groove, the locking unit operates at the same time, the movable end of the valve plate is fixed after the valve plate sinks into the groove, and in this way, the situation that the valve plate is impacted by waste gas, and consequently a gap is formed between the gas inlet flow channel and the gas outlet flow channel is avoided.

Description

technical field [0001] The present invention relates to an exhaust gas recirculation valve with high structural strength. Background technique [0002] Exhaust gas recirculation (EGR) system refers to the return of part of the exhaust gas from the car engine to the intake manifold and re-enters the cylinders with the fresh air mixture. Since the exhaust gas contains a large amount of CO2, and CO2 cannot be burned but absorbs a lot of heat, the combustion temperature of the mixture in the cylinder is lowered, thereby reducing the generation of NOx. The exhaust gas recirculation valve (EGR valve) of an automobile engine is a kind of A control device for controlling the circulation of an exhaust gas recirculation (EGR) system. [0003] When the vehicle accelerates urgently or needs to get out of trouble, the exhaust gas recirculation valve needs to be closed to allow a large amount of fresh air to enter the cylinder for combustion, so that the engine can explode with strong to...

AI Technical Summary

Problems solved by technology

[0003] When the vehicle accelerates urgently or needs to get out of trouble, it is necessary to close the exhaust gas recirculation valve to allow a large amount of fresh air to enter the cylinder for combustion, so that the engine can explode with strong torque and power to help the vehicle accelerate or get out of danger, but the current valve plate is usually installed on the valve stem , the valve stem is driven by the motor to rotate, and the valve plate opens and closes with the rotation of the valve stem. However, when the vehicle accelerates rapidly or needs to get out of trouble, the exhaust gas discharged from the engine cylinder has a high pressure, and it is easy to open the valve plate. The pipe enters the cylinder again, causing the temperature in the cylinder to drop, and the engine cannot provide enough power for the vehicle, so it is necessary to make improvements

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