Electrical control EGR valve for reducing working temperature and improving working reliability
A technology of working temperature and reliability, applied in valve details, valve device, valve operation/release device, etc., can solve problems such as increased cost and device complexity
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[0012] The technical solution of the present invention is: the servo motor 2 controlled by the ECU is sealed in the casting cylinder 1 connected with the valve seat, which effectively shields external electromagnetic interference and forms a reliable protection to prevent foreign objects from colliding with Dust pollution; the shaft end of the servo motor is connected with the star reducer 3-1 with the cycloid gear 3, and the reducer is sealed in the reducer casing. Because all the gear trains are made of polycarbonate material without lubrication; at the output end of the reducer, the crank arm mechanism 13 converts the decelerated circumferential motion of the servo motor into axial motion; the above parts are all in a dustproof box 6 in the low-temperature car body; centering in the copper sleeve 11, the valve rod connected to the spherical valve 9 is compressed by the return spring 7 so that the valve is in a closed state.
[0013] Its working procedure is: drive the servo...
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