Automatic transmission

Details Automatic transmission Automatic transmission

1997-12-01

1999-09-14

Marmor, Charles A.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475269, 475900, F16H 344

Patent

active

059514337

ABSTRACT:
In an automatic transmission, a small-capacity second clutch that does not engage for reverse drive is mounted forward of a counter drive gear, and the other engaging elements of relatively larger capacity, that is, first and third clutches and first to third brakes, are disposed rearward of the counter drive gear, so that an axially extending space is formed between the counter drive gear and the second clutch, which space is utilized to accommodate a parking gear. Such an arrangement of engaging elements allows the counter shaft to be placed closer to the input shaft without the parking gear interfering with the second clutch, thereby enabling a more compact automatic transmission. Furthermore, since there is no need to relocate the counter drive gear rearward, the length of the counter shaft can be reduced, thereby enabling still greater compactness.

REFERENCES:
patent: 4304153 (1981-12-01), Moroto et al.
patent: 4676123 (1987-06-01), Kubo et al.
patent: 5131902 (1992-07-01), Pierce
patent: 5478291 (1995-12-01), Morisawa et al.
patent: 5525117 (1996-06-01), Morisawa et al.
patent: 5700223 (1997-12-01), Park et al.
patent: 5769749 (1998-06-01), Funahashi et al.

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