Powertrain for a five-speed automatic transmission

Details Powertrain for a five-speed automatic transmission Powertrain for a five-speed automatic transmission

1997-12-29

1999-08-24

Marmor, Charles A

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475325, F16H 362

Patent

active

059417919

ABSTRACT:
A powertrain for a five-speed automatic transmission includes a first planetary gear unit comprising a first simple planetary gearset having first, second and third operating elements, a second planetary gear unit comprising second, third and fourth simple planetary gearsets having fourth, fifth, sixth, seventh, and eighth operating elements, clutches for selectively connecting the first and second operating elements to the fifth and sixth operating elements, respectively, and brakes for selectively connecting the second and eighth operating elements to a transmission housing so that the second and eighth operating elements can selectively operate as reacting elements. The seventh operating element is connected to the third operating element of the first planetary gear unit, and the fifth and sixth operating elements are connected to the first and second operating elements, respectively.

REFERENCES:
patent: 4395925 (1983-08-01), Gaus
patent: 5133697 (1992-07-01), Hattori
patent: 5542889 (1996-08-01), Pierce et al.

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