Automatic power control for variable power train

Details Automatic power control for variable power train Automatic power control for variable power train

1984-06-14

1987-05-05

Lall, Parshotam S.

Boots, shoes, and leggings

74625, 200 6188, 123361, B60K 4120, F02D 4100

Patent

active

046637133

ABSTRACT:
Microprocessor controlled automatic power control for adjusting the engine power setting in an engine-transmission power train in which the transmission drive reduction is variable in ratio, by step change or continuously so, such as for use in farm tractors. The microprocessor control monitors the position of this automatically moving lever and the desired transmission output speed to keep the setting adjusted so that engine power is set, within a deadband, to maintain a desired engine speed preferably resulting in minimum fuel consumption or in maintaining constant transmission output speed. Preferably, the microprocessor has a higher priority primary function of also automatically adjusting the transmission drive reduction ratio, for the same purpose but with higher sensitivity. The power control lever is specifically designed to automatically return the power setting to manual control as soon as the operator grabs the handle.

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S.A.E. Paper No. 780465 "Hydrostatic Transmission Controls--is There Space for Optimization" Zarotti, Nervegna, and Miotto, Apr. 1978.
"Earth Movers Dig into Computers" Truck and Off-Highway Industries, Jan./Feb., 1983.

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