Lock-up clutch system for vehicular automatic transmission

Patent · Tue Feb 25 04:00:00 EST 1986

OSTI ID:5910095

Miki, N

This patent describes a lock-up clutch system for vehicular automatic transmission including a lock-up control circuit for controlling a direct coupling clutch of a torque converter. The circuit consists of: (a) a lock-up control valve having a spool which is movably provided between a lock-up position in which the direct coupling clutch is actuated and a release position in which the direct coupling clutch is deactuated; (b) a spring disposed to always urge the spool toward the release position; (c) at least four oil passages each disposed to communicate with the lock-up control valve; (d) first oil passage constantly directing oil pressure in the direction in which the spool moves toward the release position; (e) second oil passage directing oil pressure in the direction in which the spool tends to move toward the lock-up position against the force of the spring in company with shifting gear into a speed position higher than predetermined gear position; (f) third oil passage selectively communicated with fourth and fifth oil passages, in response to the movement of the spool to occupy it at the release and lock-up positions; (g) the first and second oil passages, being individually arranged which inhibit to form a communication except for the position in which the lock-up valve occupies; and (h) an electromagnetic solenoid valve provided in the first oil passage to release the fluid oil thereof exterior upon enerigization so as to move the spool from the release position to the lock-up position to communicate the third oil passage with the fourth passage.

• Assignee: Aisin-Warner Kabushiki Kaisha, Anjo
• Patent Number(s): US 4572338
• OSTI ID: 5910095
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
CONTROL
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETISM
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GEARS
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
MAGNETISM
MECHANICAL TRANSMISSIONS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POSITIONING
PRESSURE CONTROL
SOLENOIDS
TORQUE
VALVES
VEHICLES
VELOCITY