US 6,663,529 B1Granted

Planetary manual power transmission

AssigneeGeneral Motors Corporation

InventorRaymond James Haka

Life of this patent

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Abstract

A planetary manual transmission has two planetary gearsets and five synchronizer clutches which are effective to establish at least six forward speed ratios and one reverse speed ratio between a transmission input shaft and a transmission output shaft. One of the planetary gearsets is a compound planetary gearset and the other is a simple planetary gearset. These two planetary gearsets are interconnected through two of the synchronizer clutches. The third of the synchronizer clutches connects one of the planetary gearsets with the input shaft. The fourth of the synchronizer clutches connects the other of the planetary gearsets with an output shaft, and the fifth of the synchronizer clutches selectively connects two members of the planetary gearsets connected with the output shaft to a transmission housing or stationary component. In one embodiment, the planetary gearsets will provide six forward speed ratios and in another embodiment, the planetary gearsets will provide eight forward speed ratios.

Claims8

Dependent claims

A planetary transmission comprising:

an input clutch;
an input shaft drivingly connected with said input clutch;
an output shaft;
a first planetary gearset having at least three members including a first member, a second member, and a third member;
a second planetary gearset having at least three members including a first member, a second member, and a third member;
a first synchronizer clutch selectively connecting said input shaft individually with said first member and said second member of said first planetary gearset;
a second synchronizer clutch selectively connecting said first member and said second member of said first planetary gearset with an output portion of said first planetary gearset;
a third synchronizer clutch drivingly connected with said second synchronizer clutch and being effective to interconnect each of said members of said second planetary gearset with said second synchronizer clutch;
a fourth synchronizer clutch selectively manipulable to engage said first and said second members of said second planetary gearset with a stationary component of said transmission;
a fifth synchronizer clutch selectively manipulable to connect said second member of said second planetary gearset and said third member of said second planetary gearset with said output shaft;
and
said synchronizer clutches being selectively engageable in a plurality of combinations to establish at least six forward speed ratios and one reverse speed ratio through said planetary gearsets between said input shaft and said output shaft.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/184,586Filed 28 Jun 2002
Granted: 16 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16H 3/666
Composed of a number of gear trains without drive passing from one train to another: with intermeshing orbital gears
F16H 2200/0052
Characterised by the number of forward speeds: the gear ratios comprising six forward speeds
F16H 2200/006
Characterised by the number of forward speeds: the gear ratios comprising eight forward speeds
F16H 2200/2007
Characterised by the number of sets of orbital gears: with two sets of orbital gears