Machine element or mechanism – Gearing – Interchangeably locked
Patent
1990-05-10
1991-02-05
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
74866, 3644241, B60K 2010, B60K 4118
Patent
active
049894706
ABSTRACT:
A microprocessor controlling a shuttle shift transmission may be programmed while the gearshift lever is in neutral to preselect a forward and reverse gear into which the transmission is shifted when the gearshift lever is moved to a forward or reverse position. The microprocessor may also be programmed so that, in shifting between forward and reverse, the forward and reverse gears selected differ by a pre-programmed amount. The microprocessor may be programmed to control vehicle deceleration by selecting gears in the transmission so that the transmission and/or the vehicle engine become a load for decelerating the vehicle. In the method of decelerating the tractor from relatively high vehicle speeds, the transmission is disconnected from the engine and then locked by simultaneously engaging two clutches for the simultaneous engagement of two gear ratios. A modulation of the final clutch set permits the inertial energy of the tractor to be dissipated.
REFERENCES:
patent: 4425620 (1984-01-01), Batcheller et al.
patent: 4646895 (1987-03-01), Horsch
patent: 4855913 (1989-08-01), Brekkestran et al.
John Deere & Company Sales Brochure for 4-Wheel-Drive Tractors (No Date).
Operators Manual for Versatile Model 936 and 976 Tractors (Pertinent Pages are attached), (No Date).
Ford New Holland Inc.
Wright Dirk
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