Control system for an infinitely variable transmission

Patent · Tue Jun 16 04:00:00 EDT 1987

OSTI ID:6428933

Morimoto, Y

A system for controlling an infinitely variable transmission is described for transmitting the power of an internal combustion engine having a throttle. A clutch operatively connects the engine to the transmission. The transmission comprises a drive pulley having a hydraulically shiftable first disc and a first hydraulic cylinder for shifting the first disc. A driven pulley has a hydraulically shiftable second disc and a second hydraulic cylinder for operating the second disc, and a belt engaged with both pulleys. The system comprises a pressure oil circuit having a pump for supplying oil for the cylinders, a line pressure control valve having a first spool for controlling line pressure of pressurized oil from the pump, and a transmission ratio control valve having a second spool for controlling the pressurized oil to move the first disc of the drive pulley. This changes the transmission ratio of the transmission.

• Assignee: Fuji Jukogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4672864
• OSTI ID: 6428933
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
CYLINDERS
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PRESSURE CONTROL
PRESSURE REGULATORS
PUMPS
SIGNALS
TORQUE
VALVES
VEHICLES
VELOCITY