TRANSMISSION Russian patent published in 2007 - IPC F16H3/66 B60K17/10 

FIELD: transport engineering; automatic multispeed planetary transmission.

SUBSTANCE: proposed automatic transmission with seven forward speeds and one reverse speed contains case 1, case cover 3 and pump housing 2, torsional vibration damper 4, input member 5, output member 6 and planetary reduction gear including three planetary gear trains, two controlled friction clutches and four controlled friction brakes. First planetary gear train consists of sun gear 7, planet pinion carrier 8 and ring gear 9. Second planetary gear train consists of sun gear 10, planet pinion carrier 11 and ring gear 12. Third planetary gear train consists of sun gear 13, planet pinion carrier 14 and ring gear 15. Input member 5 is connected by friction controlled clutch 16 with carrier 11 and ring gear 15, and by friction controlled clutch 17 with sun gear 13 and ring gear 12. Ring gear 9 is connected with case 1 of transmission by friction controlled brake 18. Friction controlled brake 19 connects sun gear 7 and sun gear 7 and sun gear 10 with case 1. Friction controlled brake 20 connects carrier 11 and ring gear 15 with case 1. Friction controlled brake 21 connects ring gear 12 and sun gear 13 with case cover 3. Spaces are made in drums coupled with input member 5 of transmission in which pistons 22 and 23 are installed. Space is made in pump housing 2 which accommodates piston 24. Piston 25 is installed in booster 28 rigidly mounted in transmission case 1. Space is made in transmission case 1 which accommodates piston 26. Space made in cover 3 of case houses piston 27. Output member 6 sic coupled with differential 30 through intermediate shaft 29.

EFFECT: enlarged mechanical capabilities of transmission, increased service life and improved dynamic characteristics of vehicle.

1 dwg