192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1988-09-08
1990-09-18
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 33, 192 331, F16H 4502, B60K 4102
Patent
active
049571940
ABSTRACT:
A torque converter slip control device used in an automatic transmission of an internal combustion engine of a vehicle has a torque converter to transfer engine torque to an input shaft of the automatic transmission. A feed-forward slip control subroutine controls a hydraulic circuit in a feed-forward control to vary the coupling efficiency of a lockup clutch to cause the torque converter to allow slippage at a rate suitable for cancelling a fluctuation of engine torque when the internal combustion engine is at rotational speeds higher than a preselected rotational speed higher than a predetermined fuel injection recovery speed at which an injection of fuel by a fuel system is recovered during the detection of the deceleration state of the vehicle by a deceleration senser. A feed-back slip control subroutine controls the hydraulic circuit in feed-back control to vary the coupling efficiency of the lockup clutch to make a difference of rotational speed between input and output shafts of the torque converter suitable for cancelling a fluctuation of engine torque when the internal combustion engine is at rotational speeds lower than the preselected rotational speed during the detection of the deceleration state of the vehicle by the deceleration sensor.
REFERENCES:
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Bota Keiji
Kuromida Susumu
Sawa Kenji
Bonck Rodney H.
Mazda Motor Corporation
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