Multi-speed power transmission

Details Multi-speed power transmission Multi-speed power transmission

1996-04-19

1998-01-13

Ta, Khoi Q.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475285, 475284, F16H 362

Patent

active

057073120

ABSTRACT:
A power transmission having two simple planetary gear sets produces five forward speed ratios and a reverse ratio. The two highest forward speed ratios, fourth and fifth, are overdrive ratios using the same input member in one of the planetary sets and exchanging output members in the other planetary set. The power transmission also has a continuous input drive to a sun gear of one of the planetary sets and incorporates five clutches and two brakes to establish the five forward speed ratios. The clutches and brakes are disposed in parallel with the clutch and one-way device to permit more control of the shift timing. The continuous input to the sun gear is employed in all the forward ratios and in the reverse ratio.

REFERENCES:
patent: 5069656 (1991-12-01), Sherman
patent: 5129870 (1992-07-01), Pierce
patent: 5435792 (1995-07-01), Justice et al.
patent: 5536220 (1996-07-01), Martin
patent: 5542889 (1996-08-01), Pierce et al.
patent: 5567201 (1996-10-01), Ross
patent: 5599251 (1997-02-01), Beim et al.
patent: 5605517 (1997-02-01), Sherman
U.S. Serial No. 08/561,345, filed Nov. 21, 1995, in the name of James F. Sherman and assigned to the assignee of the present invention.

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