Direct-coupled control for a torque converter including a two st

Details Direct-coupled control for a torque converter including a two st Direct-coupled control for a torque converter including a two st

1984-08-15

1986-12-16

Krizmanich, George H.

Machine element or mechanism

Gearing

With fluid drive

192 331, F16H 4502, B60K 4122

Patent

active

046287671

ABSTRACT:
A direct-coupling controller for a torque converter direct-coupling clutch in an automatic transmission. The controller can include a feedback pilot oil pressure operated reduction valve with a throttling orifice in the signal line and a pilot oil pressure switched vehicle speed response valve in parallel with the reduction valve. The vehicle speed response valve bypasses the reduction valve when vehicle speed is above a predetermined value. Alternatively, the controller includes a single valve which is pilot oil pressure switched depending on vehicle speed which in an open position directly feeds oil pressure to the clutch and which in a closed position feeds the oil pressure to the clutch while throttling the oil pressure through an orifice and permitting some of the working oil to pass the drain through another throttling orifice.

REFERENCES:
patent: 4462490 (1984-07-01), Hattori
patent: 4512212 (1985-04-01), Ishikawa
patent: 4558769 (1985-12-01), Neisen
patent: 4560043 (1985-12-01), Murasugi et al.

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