Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1988-10-19
1990-06-12
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
180307, 60468, 60487, 60488, 60489, 60494, F16D 3102
Patent
active
049322087
ABSTRACT:
A hydraulic continuously variable speed transmission comprises a hydraulic closed circuit for hydraulically connecting the hydraulic pump and the hydraulic motor, a direct clutch valve placed in the closed circuit to block it, a speed reduction ratio control actuator to control the speed reduction ratio, a direct clutch actuator for moving said direct clutch valve from a full-open position to a full-closed position, ratio detecting means which detects the speed reduction ratio and valve position detecting means which detects position of the direct clutch valve to find if the direct clutch valve is moved to a slight-open position. The direct clutch valve is moved quickly from the full-open position to the slight-open position when it is found by the ratio detecting means that the speed reduction ratio has become "1", and then the direct clutch valve is moved slowly from the slight-open position to the full-closed position when it is found that the direct clutch valve has been moved to the slight-open position.
REFERENCES:
patent: 3451218 (1969-06-01), Grant
patent: 3740951 (1973-06-01), Mori
patent: 4132072 (1979-01-01), Schlinke
patent: 4530416 (1985-07-01), Kassai
patent: 4794756 (1989-01-01), Iseman
patent: 4838024 (1989-06-01), Yamamoto et al.
patent: 4856279 (1989-08-01), Kawahara et al.
patent: 4864823 (1989-09-01), Ikejiri et al.
Ishikawa Yoshikazu
Koyama Hideo
Sasajima Koji
Yamaguchi Kouji
Honda Giken Kogyo Kabushiki Kaisha
Look Edward K.
Ryznic John
LandOfFree
Hydraulic continuously variable speed transmission with direct c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic continuously variable speed transmission with direct c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic continuously variable speed transmission with direct c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-608905