Planetary gear transmission systems or components – Nonplanetary variable speed or direction transmission... – Nonplanetary transmission is belt or chain gearing
Patent
1998-04-14
1999-11-09
Estremsky, Sherry L.
Planetary gear transmission systems or components
Nonplanetary variable speed or direction transmission...
Nonplanetary transmission is belt or chain gearing
475219, F16H 3702
Patent
active
059804149
ABSTRACT:
In a multi-range, continuously variable transmission, input engine power is split between a belt-type, continuously variable transmission unit and a system of interconnected planetary gears. This gear system then combines the split power received from the engine and the transmission unit output to produce a transmission output for propelling a vehicle in multiple forward ranges and one reverse range, each range of continuously variable speed produced by stroking the transmission unit. Synchronous shifting between ranges is achieved by selectively clutching or braking elements of the planetary gear sets at appropriate stroke settings of the transmission unit, such that the vehicle may be smoothly accelerated from rest to maximum speed.
REFERENCES:
patent: 3106855 (1963-10-01), Reichenbaecher
patent: 3596535 (1971-08-01), Polak
patent: 4644820 (1987-02-01), Macey et al.
patent: 4754664 (1988-07-01), Dick
patent: 5011458 (1991-04-01), Kumm
patent: 5055094 (1991-10-01), Cataldo
patent: 5730678 (1998-03-01), Larkin
Company Profile and Product Range, Van Doorne's Transmissie b.v., 11 pages, Nov. 1995.
Vahabzadeh, H., et al., "A Split-Torque, Geared-Neutral Infinitely Variable Transmission Mechanism," 10 pages, undated. (approx 1990).
Bedford, H., et al., "The Lever Analogy--A New Tool in Transmission Analysis," No. 0148-7191/81/0223-0102502.50, Copyright 1981, Society of Automotive Engineers, Inc.
Estremsky Sherry L.
General Dynamics Land Systems Inc.
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