Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1979-03-26
1981-03-10
Hunter, H. Hampton
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74687, 74720, B60K 4104, B60K 4112
Patent
active
042546729
ABSTRACT:
A control system for a stepless variable speed transmission of power splitting type for use in a vehicle in which the power from an engine is transmitted with a controllable speed and wherein part of the power is converted into hydraulic power by means of hydraulic pump motor. The system comprises an up shift valve which switches a hydraulic pressure of a clutch and brake in the transmission to change the transmission to a high speed ratio range when a speed ratio increasing hydraulic pressure in a speed ratio control actuator exceeds a given value, a down shift valve which switches the hydraulic pressure of the clutch and brake to change the transmission to a low speed ratio range when a speed ratio decreasing hydraulic pressure exceeds a given value and a directional control valve which reverse the direction of the speed ratio increasing and the speed ratio decreasing hydraulic pressure to the actuator in accordance with a pressure difference between the hydraulic pressure of the clutch and brake in the low speed ratio range and the hydraulic pressure of the clutch and brake in the high speed range.
REFERENCES:
patent: 3442153 (1969-05-01), Ross
patent: 4033203 (1977-07-01), Hirosawa et al.
patent: 4043227 (1977-08-01), Beals et al.
patent: 4091690 (1978-05-01), Miyao
patent: 4170153 (1979-10-01), Mizano et al.
Maeda Hiroaki
Mizuno Kiyofumi
Sato Masanori
Suzuki Satomi
Takahashi Shigeo
Aisin Seiki Kabushiki Kaisha
Hunter H. Hampton
LandOfFree
Control system for a stepless variable speed transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control system for a stepless variable speed transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for a stepless variable speed transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1289366