Torque motor throttle valve

Abstract

The invention discloses a torque motor throttle valve. The torque motor throttle valve comprises a valve body; a rotating shaft is arranged in the valve body; a valve piece assembled in a valve body channel is arranged at the bottom end of the rotating shaft; a motor for driving the rotating shaft and the valve piece to act is arranged at the top end of the valve body and is a torque motor; a containing cavity is formed in the position, below the torque motor, of the valve body; an output shaft of the torque motor and the top end of the rotating shaft are connected through a coupling located in the containing cavity; the center of the coupling is connected with the rotating shaft through a needle bearing assembled in the center in an interference mode; the outer circle of the needle bearing is further sleeved with a torsion spring for resetting of the rotating shaft and the valve piece; and the top end of the torsion spring is fixedly connected with the coupling, and the bottom end ofthe torsion spring is fixedly connected with the valve body. The torque motor throttle valve is simple in structure, sensitive in action, long in service life and large in torque, and various workingcondition requirements can be met without moment increasing of a gear train.

Description

technical field [0001] The invention relates to the technical field of diesel engine exhaust gas recirculation systems, in particular to an electronic throttle valve for adjusting engine intake pressure. Background technique [0002] For a supercharged intercooled diesel engine, under certain operating conditions, there will be a problem that the intake air pressure after the intercooler is greater than the exhaust pressure in front of the turbine, making it difficult for the exhaust gas to flow into the intake pipe, which will further lead to exhaust gas recirculation The system (EGR system) cannot function; at this time, it is necessary to install an electronic throttle valve in the intake pipe of the diesel engine to throttle and reduce pressure. [0003] As the country has higher and higher requirements on automobile exhaust emissions, the automobile industry has become more and more strict on the exhaust after-treatment system, and the requirements on the engine exhaust...

AI Technical Summary

Problems solved by technology

[0002] For a supercharged intercooled diesel engine, under certain operating conditions, there will be a problem that the intake air pressure after the intercooler is greater than the exhaust pressure in front of the turbine, making it difficult for the exhaust gas to flow into the intake pipe, which will further lead to exhaust gas recirculation The system (EGR system) cannot function; at this time, it is necessary to install an electronic throttle valve in the intake pipe of the diesel engine for throttling and pressure reduction

[0003] As the country has higher and higher requirements on automobile exhaust emissions, the automobile industry has become more and more strict on the exhaust after-treatment system, and the requirements on the engine exhaust gas recirculation system (EGR system) have also become higher and higher. The traditional exhaust gas recirculation system ( EGR system) has been unable to meet the requirements

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