Planetary gear transmission systems or components – Plural power paths to planetary gearing – Plural planetary units
Patent
1991-03-18
1992-08-25
Lorence, Richard
Planetary gear transmission systems or components
Plural power paths to planetary gearing
Plural planetary units
475780, 475313, 475319, F16H 366, F16H 362
Patent
active
051414775
ABSTRACT:
A multistage automatic transmission has input and output shafts which are coaxially arranged, a first planetary gearset, a second planetary gearset, a plurality of clutches, and first and second brakes. The first planetary gearset includes mutually meshed paired pinions that mesh with a first sun gear and a first ring gear, and a carrier that rotatably carries the mutually meshed paired pinions. The second planetary gearset includes a single type pinion meshed with a second sun gear and a second ring gear, and a second carrier that rotatably carries the single type pinion. The first and second gearset are coaxially aligned between the input and output shafts. The arrangement of the clutches is such that when shifting to any particular neighboring gear, the condition of no more than two of the clutches needs to be changed.
REFERENCES:
patent: 1454578 (1923-05-01), Towler
patent: 2838960 (1958-06-01), Simpson
patent: 2865230 (1958-12-01), Simpson
patent: 2873624 (1959-02-01), Simpson
patent: 2873625 (1959-02-01), Simpson
patent: 3031001 (1962-05-01), Simpson
patent: 3486398 (1969-12-01), Waclawek
patent: 4483215 (1984-11-01), Ishimaru et al.
patent: 4638688 (1987-01-01), Hirawa
Lorence Richard
Nissan Motor Co,. Ltd.
Ta Khoi O.
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