EGR valve

Abstract

The invention relates to an EGR valve. The ERG valve comprises a motor assembly, wherein the motor assembly comprises a motor shaft; and the ERG valve is characterized in that one end of the motor shaft is connected with a plug assembly, the other end of the motor shaft is connected with a valve body assembly, wherein the valve body assembly comprises a valve rod, one end of the valve rod is connected with a valve plate, the other end, opposite to the end connected with the valve plate, of the valve rod is inserted into a sliding block through a connecting sleeve, the valve rod can axially swing relative to the sliding block through the connecting sleeve, the other end, opposite to the end connected to the connecting sleeve, of the sliding block is connected with the motor shaft, and the sliding block and the motor shaft are crossed to form a 90-degree angle. The EGR valve has the beneficial effects that a torque motor is used, the total size of a valve body is reduced, and a built-inactive control chip reduces the requirement for an ECU; and the EGR valve is simple in overall structure, small in occupied space and short in response time.

Description

Technical field [0001] The present invention relates to the field of EGR technology, in particular to an EGR valve. Background technique [0002] Exhaust Gas Recirculation (Exhaust Gas Recirculation) is abbreviated as EGR, which returns a small part of the exhaust gas produced by a diesel engine or a gasoline engine back to the cylinder. Due to the inertness of the recirculated exhaust gas, the combustion process will be delayed, that is to say, the combustion speed will slow down and the pressure formation process in the combustion chamber will be slowed down, which is the main reason for the reduction of nitrogen oxides. In addition, increasing the exhaust gas recirculation rate will reduce the total exhaust gas flow (mass flow), so the total pollutant output in exhaust emissions will be relatively reduced. The task of the EGR system is to make the recirculation amount of exhaust gas reach the best condition at each operating point, so that the combustion process is always in ...

AI Technical Summary

Problems solved by technology

After the existing linear reciprocating electronically controlled EGR valve runs for a long time, it is easy to generate carbon deposits around the valve and cannot be cleaned, which eventually leads to slower and slower response speed of the EGR valve, which then gets stuck and cannot be opened normally

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