Hydraulic control apparatus for a continuously variable transmission

Patent · Mon Dec 22 23:00:00 EST 1986

OSTI ID:6812236

Tokoro, S; Shigematsu, T; Watanabe, T

A hydraulic control apparatus is described for controlling a RPM of an engine in a motor vehicle using a continuously variable transmission. The transmission has a driving pulley mounted in an input shaft, the driving pulley comprising a fixed member and a movable member. The movable member is actuated by a hydraulic cylinder to form a V-shaped opening between the movable member and the fixed member. A driven pulley is mounted on an output shaft. The driven pulley comprises another fixed member and another movable member. The another movable member is similarly actuated by another hydraulic cylinder supplied with a line pressure to form another v-shaped opening between the another movable member and the another fixed member and an endless belt member spanning the pulleys so that an effective diameter of the pulleys can be varied with regard to each other so that different speed ratios can be obtained. The apparatus comprises: a first torque sensing means for detecting an input torque on the input shaft of the driving pulley generated by the power stroke of the engine and for outputting an input torque signal. The first torque sensing means is in communication with the input shaft; a second torque sensing means for detecting an output torque on the output shaft of the driven pulley generated by the power stroke of the engine and for outputting an output torque signal. The second torque sensing means is in communication with the output shaft; and a control circuit.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Aichi
• Patent Number(s): US 4631043
• OSTI ID: 6812236
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
COMPUTER CALCULATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
CYLINDERS
ENGINES
EQUIPMENT
FLUIDS
HYDRAULIC CONTROL DEVICES
HYDRAULIC FLUIDS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MEMORY DEVICES
MOTION
ROTATION
SHAFTS
SIGNALS
TORQUE
VEHICLES
VELOCITY
WORKING FLUIDS