Direct-coupling control device for torque converter for automati

Details Direct-coupling control device for torque converter for automati Direct-coupling control device for torque converter for automati

1984-10-17

1987-04-28

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 333, 192103F, F16H 4502, F16D 3316

Patent

active

046606904

ABSTRACT:
A direct-coupling control device for a torque converter for an automatic vehicular transmission in which a valve controlling the locking force of a direct-coupling mechanism is provided with two independently-formed pressure chambers pushing a valve body in a direction in which a locking force is increased. The device is also provided with a first fluid pressure output connected to one of the pressure chambers, and a second fluid pressure output connected to the other. When the first fluid pressure is higher than the second fluid pressure, the first fluid pressure acts on the sum of the individual working areas of the first and second fluid pressures on the valve body. A reliable speed change control can be provided by the two fluid pressures, and the capacity characteristics of the direct-coupling mechanism can be selected optimally with respect to these fluid pressures. The locking force of the direct-coupling mechanism can be increased quickly in proportion to increasing vehicle speed, and fuel costs can be reduced very effectively.

REFERENCES:
patent: 2728427 (1955-12-01), Lucia
patent: 2756851 (1956-07-01), Collins
patent: 3237734 (1966-03-01), Jania
patent: 3810531 (1974-05-01), Edmunds
patent: 4253553 (1981-03-01), Yamada et al.
patent: 4290513 (1981-09-01), Nishimura et al.

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