Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid resistance inhibits relative rotation
Patent
1995-05-08
1998-06-16
Ta, Khoi Q.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid resistance inhibits relative rotation
475276, F16H 4826, F16H 362
Patent
active
057661081
ABSTRACT:
A continuously variable transmission utilizing variable viscous couplings and power planetary gear sets having 1) a power input means; 2) a common ring gear means connected to the power input means; 3) a center planetary and reverse brake means connected to the common ring gear means; and 4) a power output means having a control planetary gear assembly mounted between a power output shaft and the common ring gear means. The power input means has an input planetary assembly connected to a power input shaft and operably connected to the common ring gear means. The center planetary and reverse clutch means includes a center planetary gear assembly connected to a reverse variable viscous brake to control operation in a reverse operation mode. The power input means includes a control planetary gear assembly operably connected to the common ring gear means and to a ratio variable viscous clutch to control operation in a drive range operation. A start variable viscous brake is connected to the common ring gear means to hold stationary during a low range start operation. The power planetary gear sets operate to achieve 1) a neutral operation when none of the viscous brakes or clutches are engaged; 2) a reverse operation when the reverse variable viscous brake is engaged; 3) an initial start or low range drive mode when the start variable viscous brake is engaged; and 4) a ratio variable viscous clutch is incrementally engaged and achieves maximum speed of the power output shaft when fully engaged.
REFERENCES:
patent: 3952613 (1976-04-01), Iijima
patent: 4747464 (1988-05-01), Lanzer
patent: 5030180 (1991-07-01), Johnston
patent: 5165308 (1992-11-01), Asada et al.
Rein Phillip A.
Ta Khoi Q.
LandOfFree
Continuously variable transmission utilizing variable viscous co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuously variable transmission utilizing variable viscous co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable transmission utilizing variable viscous co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1718666