Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1991-05-10
1992-12-01
Bonck, Rodney H.
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
475275, 475288, F16H 362
Patent
active
051675927
ABSTRACT:
An automatic transmission for use with an automotive vehicle having an engine provided with an output shaft, and a differential. The automatic transmission comprises a casing, and first, second and third shafts arranged in the casing. The first shaft is concentrical with the engine output shaft. The second shaft is parallel with the first shaft. The third shaft is concentrical with the second shaft. The third shaft is connected to the differential. A first transfer gear train is provided for transmitting rotation from the first shaft to the second shaft. The automatic transmission also comprises a main transmission unit including planetary gearing having rotary members for providing a plurality of torque delivery paths between the second and third shafts, and friction elements associated with the planetary gearing for selecting one of the torque delivery paths in response to a selected gear position. The planetary gearing is provided on the second shaft. An equivalent rotary member is provided on the first shaft. The equivalent rotary member is equivalent to one of the rotary members. The friction elements includes a first friction element through which the equivalent rotary member is connected to the first shaft and a second friction element through which the equivalent rotary member is connected to the casing. A second transfer gear train is provided for transmitting rotation from the one rotary member to the equivalent rotary member.
REFERENCES:
patent: 3915033 (1975-10-01), Polak
patent: 4774856 (1988-10-01), Hiraiwa
patent: 5013289 (1991-05-01), Van Maanen
Bonck Rodney H.
Jatco Corporation
Kananen Ronald P.
Massey Ryan W.
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