EP 1800026 A1 20070627 - CONTINUOUSLY VARIABLE RATIO TRANSMISSION SYSTEM
Title (en)
CONTINUOUSLY VARIABLE RATIO TRANSMISSION SYSTEM
Title (de)
STUFENLOSES GETRIEBESYSTEM
Title (fr)
SYSTEME DE TRANSMISSION A RAPPORT A VARIATION CONTINUE
Publication
Application
Priority
- GB 2005003622 W 20050920
- GB 0420865 A 20040920
Abstract (en)
[origin: GB2418235A] A compact CVT comprises coaxial system input and output shafts 16,20, a continuously variable ratio transmission unit (variator) V connected to the input shaft 16 and having a coaxial variator output shaft 18 drivably connected to an input sun gear S1 of a mixing planetary gear train G1. The mixing planetary gear train G1 has first planet gears P1 engaged with the input sun gear S1 and mounted on a planet carrier C1 which is drivably connected to the system input shaft 16. Second plant gears P2 are also mounted on the planet carrier C1 and are arranged to rotate with the first planet gears P1 and drivingly engaged with an output sun gear S2 connected to an output shaft 20. A ratio between the number of teeth on the input sun gear S1 divided by the number of teeth on the first planet gears P1 is set to be greater than the ratio between the number of teeth on the output sun gear S2 divided by the number of teeth on the second planet gears P2. This ensures the vanator always transmits less than 100% of the engine power, which allows the variator to be made compact.
IPC 8 full level
F16H 37/08 (2006.01)
CPC (source: EP)
F16H 37/084 (2013.01); F16H 37/086 (2013.01); F16H 2061/6601 (2013.01)
Citation (search report)
See references of WO 2006032870A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
GB 0420865 D0 20041020; GB 2418235 A 20060322; EP 1800026 A1 20070627; WO 2006032870 A1 20060330
DOCDB simple family (application)
GB 0420865 A 20040920; EP 05784363 A 20050920; GB 2005003622 W 20050920