Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1981-02-18
1983-12-27
Braun, Leslie A.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74866, 3644241, F16H 344
Patent
active
044223501
ABSTRACT:
The time required for shifting gears from an old to a new gear and the jolt created by the shift is decreased by initiating a known overlap of disengagement of the friction elements of the old gear and engagement of the friction elements of the new gear at the time the hydraulic unit operating the friction elements of the new gear is completely filled. Since a voltage pulse occurs across the solenoid winding of the pressure regulator when the hydraulic unit is completely filled, the solenoid valve is monitored by a threshold circuit which responds to the pulse. The output of the threshold circuit sets a flipflop. The flipflop is reset in response to a gear shift initiation signal furnished by a microprocessor. The microprocessor samples the flipflop output to determine whether the hydraulic unit is completely filled and initiates the overlap portion of the gear shift when this is so.
REFERENCES:
patent: 3741042 (1973-06-01), Ravenel
patent: 4228700 (1980-10-01), Espenschied et al.
patent: 4262335 (1981-04-01), Ahlen et al.
patent: 4290322 (1981-09-01), Huitema
Eschrich Gerhard
Muller Alfred
Schreiber Achim
Braun Leslie A.
McKenzie, Jr. Frank H.
Robert & Bosch GmbH
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