US 6,712,733 B2Granted

Family of five-speed transmission mechanisms having a stationary interconnecting member

AssigneeGeneral Motors Corporation

InventorsMadhusudan Raghavan, Chunhao J. Lee, Patrick Benedict Usoro

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Abstract

The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least five forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets, first and second interconnecting members, and four clutches. The powertrain includes an engine and torque converter that is continuously connected to at least one member of the third planetary gear set and an output member that is continuously connected with another member of the third planetary gear set. The second interconnecting member continuously connects members of the first and second planetary gear sets with the transmission housing. The four clutches provide interconnections between various gear members, the first interconnecting member, and with the input and the output shaft, and are operated in combinations of two to establish at least five forward speed ratios.

Claims11

Dependent claims

A transmission comprising:

an input shaft;
an output shaft;
first, second and third planetary gear sets each having first, second and third members;
said input shaft being continuously interconnected with a member of the third planetary gear set, said output shaft being continuously interconnected with another member of the third planetary gear set;
a first interconnecting member continuously interconnecting said first member of said first planetary gear set with said first member of said second planetary gear set;
a second interconnecting member continuously interconnecting said second member of said first planetary gear set and said second member of said second planetary gear set with a transmission housing;
a first clutch selectively interconnecting said third member of said first planetary gear set with said input shaft, said first member of said third planetary gear set;
a second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set;
a third clutch selectively interconnecting said third member of said third planetary gear set with a member of said second planetary gear set;
a fourth clutch selectively interconnecting third member of said third planetary gear set with a member of said first or second planetary gear set, said members interconnected by said fourth clutch being different from the members interconnected by said first, second and third clutches;
said first, second, third or fourth clutches being engaged in combinations of two to establish at least five forward speed ratios and a reverse speed ratio between said input shaft and said output shaft.

8 more elements

A transmission comprising:

an input shaft;
an output shaft;
first, second and third planetary gear sets each having first, second and third members;
said input shaft being continuously interconnected with a member of the third planetary gear set, said output shaft being continuously interconnected with another member of the third planetary gear set;
a first interconnecting member continuously interconnecting said first member of said first planetary gear set with said first member of said second planetary gear set;
a second interconnecting member continuously interconnecting said second member of said first planetary gear set and said second member of said second planetary gear set with a transmission housing;
first, second, third and fourth clutches being selectively engageable to establish combinations of members joined for common rotation to provide at least five forward speed ratios and a reverse speed ratio between said input shaft and said output shaft, said combinations including either:
an engaged combination with said first clutch selectively connecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of third planetary gear set, and said fourth clutch selectively interconnecting said third member of said second planetary gear set with said third member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said second member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said second member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said first member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said third member of said first planetary gear set with said third member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said second member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said third member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said first planetary gear set with said first member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said first planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said first member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third torque clutch interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said first member of said second planetary gear set with said second member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary sear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said third member of said second planetary gear set with said third member of said third planetary gear set;
or
an engaged combination with said first clutch selectively interconnecting said third member of said first planetary gear set with said first member of said third planetary gear set, said second clutch selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, said third clutch selectively interconnecting said first member of said second planetary gear set with said third member of said third planetary gear set, and said fourth clutch selectively interconnecting said third member of said first planetary gear set with said third member of said third planetary gear set.

25 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/082,462Filed 25 Feb 2002
Published: US 2003/0162628 A128 Aug 2003
Granted: 30 Mar 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16H 3/66
Gearings having three or more central gears: composed of a number of gear trains without drive passing from one train to another
F16H 3/666
Composed of a number of gear trains without drive passing from one train to another: with intermeshing orbital gears
F16H 2200/0047
Characterised by the number of forward speeds: the gear ratios comprising five forward speeds
F16H 2200/201
Characterised by the number of sets of orbital gears: with three sets of orbital gears