Nine-speed transmissions with four planetary gear sets

Details Nine-speed transmissions with four planetary gear sets Nine-speed transmissions with four planetary gear sets

2007-06-05

2007-06-05

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S286000

Reexamination Certificate

active

11071839

ABSTRACT:
Nine-speed transmissions are provided that include four planetary gear sets having six torque-transmitting mechanisms and various fixed interconnections to provide nine forward speed ratios and a reverse speed ratio. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another of the planetary gear members. The six torque-transmitting mechanisms are operated in combinations of two. Reduced component speeds and improved ratios are achieved.

REFERENCES:
patent: 4070927 (1978-01-01), Polak
patent: 4683776 (1987-08-01), Klemen
patent: 4709594 (1987-12-01), Maeda
patent: 5106352 (1992-04-01), Lepelletier
patent: 5385064 (1995-01-01), Reece
patent: 5497867 (1996-03-01), Hirsch et al.
patent: 5560461 (1996-10-01), Loeffler
patent: 5599251 (1997-02-01), Beim et al.
patent: 5641045 (1997-06-01), Ogawa et al.
patent: 5651435 (1997-07-01), Perosky et al.
patent: 5975263 (1999-11-01), Forsyth
patent: 6053839 (2000-04-01), Baldwin et al.
patent: 6071208 (2000-06-01), Koivunen
patent: 6083135 (2000-07-01), Baldwin et al.
patent: 6176803 (2001-01-01), Meyer et al.
patent: 6217474 (2001-04-01), Ross et al.
patent: 6354416 (2002-03-01), Eo
patent: 6375592 (2002-04-01), Takahashi et al.
patent: 6422969 (2002-07-01), Raghavan et al.
patent: 6425841 (2002-07-01), Haka
patent: 6471615 (2002-10-01), Naraki et al.
patent: 6558287 (2003-05-01), Hayabuchi et al.
patent: 6623397 (2003-09-01), Raghavan et al.
patent: 6634980 (2003-10-01), Ziemer
patent: 2004/0048716 (2004-03-01), Ziemer
patent: 2004/0097324 (2004-05-01), Ziemer
patent: 2004/0147358 (2004-07-01), Biermann
patent: 09-126283 (1997-05-01), None

Affiliated with

Also associated with

Rating

Nine-speed transmissions with four planetary gear sets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nine-speed transmissions with four planetary gear sets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nine-speed transmissions with four planetary gear sets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3817315