HYDROMECHANICAL TRANSMISSION Russian patent published in 2006 - IPC F16H3/62 F16H47/08 B60K17/10 

FIELD: transport engineering.

SUBSTANCE: invention relates to planetary transmission used in vehicle automatic transmission systems. Proposed automatic hydromechancial transmission with six forward speeds and open reverse speed has case 1, torque converter 2, input member 3, output member 4 and planetary reduction gear, three friction clutches and two friction brakes. According to invention, planetary reduction gear of proposed transmission consists of three planetary gear trains. First planetary gear train consists of sun gear 5, planet pinion carrier 6 and crown gear 7. Second planetary gear train consists of sun gear 8, planet pinion carrier 9 and crown gear 10. Third planetary gear train consists of sun gear 11, planet pinion carrier 12 and crown gear 13. Input member 3 is connected by friction clutch 14 with carrier 9 of second planetaty gear train. Input member 3 is connected by friction clutch 15 with carrier 6 of first planetary gear train. Crown gear 10 of second planetary gear train is coupled with input member 3. Carrier 6 of first planetary gear train is connected by friction clutch 16 with carrier of second planetary gear train. Carrier 6 of first planetary gear train is connected with case 1 by friction brake 17. Friction brake 18 connects crown gear 13 of third planetary gear train with case 1.

EFFECT: enlarged kinematic capabilities, increased service life of transmission.

12 cl, 14 dwg