The invention discloses an electric EGR valve driven by a torsion motor, which comprises a valve body, a
valve stem, and a valve plate connected to the lower end of the
valve stem. The lower end of the valve body is an air inlet, and the
valve stem is connected with a torsion motor through a connecting device; The connecting device includes a connecting bent plate connected to the upper end of the valve stem, an eccentric wheel connected to the rotor of the torsion motor, a
torsion spring, and an
involute groove is arranged on the eccentric wheel, and the connecting bent plate is connected to the bearing through the connecting rod, and the bearing is arranged on the eccentric wheel In the
involute groove, one end of the
torsion spring is connected to the
stator of the torsion motor, and the other end of the
torsion spring is connected to the eccentric wheel; the rotor of the torsion motor is connected with the eccentric wheel through the spring shaft. Install the bearing on the stem in the
involute groove of the eccentric. Supply power to the torsion motor, so that the motor rotor and the eccentric wheel rotate after overcoming the turning force of the torsion spring, and the bearing slides in the involute groove of the eccentric wheel to drive the valve stem and valve plate to move downward, that is, to realize the function of opening the EGR valve . When the power
supply current of the torsion motor is reduced, the rotation of the rotor and the eccentric wheel can be realized through the tension of the torsion spring, thereby driving the valve stem and the valve core to move upward, that is, the closing function of the EGR valve can be realized.