US 2010/0132492 A1Published application

Hybrid powertrain and dual clutch transmission

AssigneeGM Global Technology Operation LLC

InventorAlan G. Holmes

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Abstract

An automatic dual clutch transmission includes an input clutch which selectively connects a prime mover to an electric motor. The electric motor output, in turn, drives a pair of gears, one of which is in constant mesh with a first gear on a first quill and a second gear on a second quill, the other being in constant mesh with a third gear on the first quill and a fourth gear on the second quill. On each quill, between each pair of gears driven by the input is a pair of dog clutches which connect one of the two gears to the associated quill. Each of the quills drives an input of a respective pair of friction clutches which drive a respective pair of layshafts or countershafts. A similar arrangement of a second pair of gears flanked by dog clutches connects each layshaft or countershaft through one of a pair of gears which are in constant mesh with a pair of output gears coupled to and driving a differential cage.

Claims19

Dependent claims

A dual clutch automatic transmission comprising, in combination,

a input clutch having an input adapted to be driven by an engine and an output,
an electric motor coupled to said output of said input clutch and having an output shaft,
a first drive gear and a second drive gear coupled to said output shaft,
a first quill having a first input gear rotatably disposed thereon and in constant mesh with said first drive gear and a third input gear rotatably disposed thereon and in constant mesh with said second drive gear,
a first dog clutch for connecting one of said first and third input gears to said first quill,
a second quill having a second input gear rotatably disposed thereon and in constant mesh with first drive gear and a fourth input gear rotatably disposed thereon and in constant mesh with said second drive gear,
a second dog clutch for connecting one of said second and fourth input gears to said second quill,
a first countershaft disposed coaxially with said first quill and a first countershaft clutch for connecting said first quill and said first countershaft,
a second countershaft disposed coaxially with said second quill and a second countershaft clutch for connecting said second quill and said second countershaft, a first output gear disposed on said first countershaft and in constant mesh with a first differential input gear,
a second output gear disposed on said second countershaft and in constant mesh with said first differential input gear,
a third output gear disposed on said first countershaft and in constant mesh with a second differential input gear,
a fourth output gear disposed on said second countershaft and in constant mesh with a said second differential input gear,
a third dog clutch assembly disposed on said first countershaft between said first and said third output gears for selectively connecting said first and third output gears to said first countershaft,
a fourth dog clutch assembly disposed on said second countershaft between said second and said fourth output gears for selectively connecting said second and said fourth output gears to said second countershaft, and
a differential assembly driven by said first and said second differential input gears and having a pair of coaxial outputs.

12 more elements

A dual clutch transmission comprising, in combination,

an input shaft coupled to and driving a first drive gear and a second drive gear spaced from said first drive gear,
a first quill having a first gear rotatably disposed thereon and in constant mesh with said first drive gear,
a second quill having a second gear rotatably disposed thereon and in constant mesh with first drive gear and
a third gear rotatably disposed on said first quill and in constant mesh with said second drive gear,
a fourth gear rotatably disposed on said second quill and in constant mesh with said second drive gear,
a first dog clutch disposed on said first quill between said first gear and said third gear for connecting said first gear or said third gear to said first quill,
a second dog clutch disposed on said second quill between said second gear and said fourth gear for connecting said second gear or said fourth gear to said second quill,
a first countershaft disposed coaxially with said first quill and a first countershaft clutch for connecting said first quill and said first countershaft,
a second countershaft disposed coaxially with said second quill and a second countershaft clutch for connecting said second quill and said second countershaft,
a first output gear rotatably disposed on said first countershaft and in constant mesh with a first differential input gear,
a second output gear rotatably disposed on said second countershaft and in constant mesh with said first differential input gear,
a third output gear rotatably disposed on said first countershaft and in constant mesh with a second differential input gear,
a fourth output gear rotatably disposed on said second countershaft and in constant mesh with a said second differential input gear,
a third dog clutch disposed on said first countershaft between said first and said third output gears for selectively connecting said gears to said first countershaft,
a fourth dog clutch disposed on said second countershaft between said second and said fourth output gears for selectively connecting said gears to said second countershaft, and
a differential assembly driven by said first and said second differential input gears and having a pair of coaxial outputs.

13 more elements

A dual clutch transmission comprising, in combination,

an input shaft coupled to and driving a first drive gear and a second drive gear,
a first quill having a first pair of input gears rotatably disposed thereon, one of said first pair of input gears in constant mesh with each of said first and second drive gears,
a first dog clutch disposed on said first quill between said first pair of input gears for selectively connecting one of said first pair of input gears to said first quill,
a second quill having a second pair of input gears rotatably disposed thereon, one of said second pair of input gears in constant mesh with each of said first and second drive gears,
a second dog clutch disposed in said second quill between said second pair of input gears for selectively connecting one of said second pair of input gears to said second quill,
a first countershaft disposed coaxially with said first quill and a first countershaft clutch for selectively connecting said first quill and said first countershaft,
a second countershaft disposed coaxially with said second quill and a second countershaft clutch for selectively connecting said second quill and said second countershaft,
a first pair of output gears rotatably disposed on said first countershaft, one of said first pair of output gears in constant mesh with a first differential input gear and a second differential input gear,
a third dog clutch disposed on said first countershaft between said first pair of output gears for selectively connecting said gears to said first countershaft,
a second pair of output gears rotatably disposed on said second countershaft, one of said second pair of output gears in constant mesh with said first differential input gear and said second differential input gear,
a fourth dog clutch disposed on said second countershaft between said second pair of output gears for selectively connecting said gears to said second countershaft, and
a differential assembly driven by said first and said second differential input gears and having a pair of outputs.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/327,636Filed 3 Dec 2008
Published: 3 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B60K 6/48
Characterised by the architecture of the hybrid electric vehicle: parallel type
B60K 6/405
Characterised by the assembly or relative disposition of components: housings
F16H 3/006
Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion: power being selectively transmitted by…
B60Y 2400/428
Clutches or brakes: double clutch arrangements; Dual clutches