192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1996-01-11
1997-03-25
Lorence, Richard M.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 326, 192 33, 192 333, 192 4R, 192 82T, 747311, B60K 4128
Patent
active
056135815
ABSTRACT:
An electrohydraulic control device for a drive train of a machine including an engine, a transmission, a torque converter, and an impeller clutch is disclosed. A manually operated impeller clutch pedal produces an impeller clutch pedal signal in response to the position of the impeller clutch pedal. An impeller clutch electrohydraulic valve produces fluid flow to the impeller clutch to controllably engage and disengage the impeller clutch. An impeller clutch pressure curve that is responsive to the impeller clutch pedal position is stored in memory. A rotary position switch selects a desired rimpull setting indicative of a desired reduction in rimpull and produces a desired rimpull signal. An electronic controller receives the desired rimpull signal and reconfigures the impeller clutch pressure curve. Thereafter, the electronic controller receives the impeller clutch pedal signal and controllably actuates the electrohydraulic valve to produce a desired impeller clutch pressure defined by the impeller clutch pressure curve.
REFERENCES:
patent: 5040648 (1991-08-01), Mitchell et al.
patent: 5456333 (1995-10-01), Brandt et al.
patent: 5509520 (1996-04-01), Evans et al.
Christensen Steven V.
Fonkalsrud Andrew O.
Grill Thomas L.
McGowan Mitchell J.
Caterpillar Inc.
Lorence Richard M.
Masterson David M.
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