Multi-speed power transmission

Details Multi-speed power transmission Multi-speed power transmission

1998-03-13

1999-10-26

Marmor, Charles A.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural drive ratios other than unity

475218, F16H 344

Patent

active

059718838

ABSTRACT:
A simple planetary gearset and four transfer gear pairs are combined to provide five forward speed ratios and two reverse speed ratios in a power transmission. Three selectively engageable clutches controlling three of the transfer gear pairs are engaged in combination with two selectively engageable friction devices controlling the simple planetary gearset to establish four of the forward speed ratios and the two reverse ratios. A fourth selectively engageable clutch, controlling the fourth transfer gear pair establishes a forward ratio numerically central of the aforementioned four forward ratios.

REFERENCES:
patent: 4614133 (1986-09-01), Nerstad et al.
patent: 5013289 (1991-05-01), Van Maanen
patent: 5149307 (1992-09-01), Malloy et al.
patent: 5520588 (1996-05-01), Hall, III
patent: 5573471 (1996-11-01), Shubinsky et al.

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