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US 10,883,573 B2Granted
Dual clutch transmission with a reverse countershaft
AssigneeDana Belgium N.V.
InventorsThibault G. Devreese, Benoit Vandevoorde
Life of this patent
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Abstract
Provided herein is a dual clutch transmission including a reverse countershaft that is selectively engaged with at least one primary shaft and provides speed ratio changes without torque interruption and a compact axial arrangement.
Claims14
A dual clutch transmission, comprising:
- an input shaft drivingly connected to an engine;
- an output shaft;
- a first primary shaft having a plurality of gears rotatably mounted thereon;
- a second primary shaft having a plurality of gears rotatably mounted thereon;
- a first clutch directly connected to the second primary shaft and drivingly connected to the input shaft;
- a second clutch directly connected to the first primary shaft and drivingly connected to the input shaft;
- a first countershaft having a plurality of even gears selectively fixed thereto, a plurality of odd gears selectively fixed thereto, a first rigidly fixed gear attached thereto, and a second rigidly fixed gear attached thereto, wherein the plurality of even gears are selectively in driving engagement with the plurality of gears on the first primary shaft, the plurality of odd gears are selectively in driving engagement with the plurality of gears on the second primary shaft, and the first rigidly fixed gear is in driving engagement with the output shaft;
- a second countershaft having a plurality of even gears selectively fixed thereto, a plurality of odd gears selectively fixed thereto, and a first rigidly fixed gear attached thereto, wherein the plurality of even gears are selectively in driving engagement with the plurality of gears on the first primary shaft, the plurality of odd gears are selectively in driving engagement with the plurality of gears on the second primary shaft, and the first rigidly fixed gear is in driving engagement with the output shaft;
- and
- a reverse countershaft having a plurality of odd and even gears selectively fixed thereto and a rigidly fixed gear attached thereto and drivingly engaged with the second rigidly fixed gear on the first countershaft,
- wherein the odd gears on the reverse countershaft are selectively engaged with the plurality of gears mounted on the first primary shaft and the even gears on the reverse countershaft are selectively engaged with the plurality of gears mounted on the second primary shaft.
8 more elements
A dual clutch transmission, comprising:
- an input shaft drivingly connected to an engine;
- a primary shaft having a plurality of gears rotatably mounted thereto;
- a first clutch drivingly engaged with the input shaft and a first countershaft;
- a second clutch drivingly engaged with the input shaft and a second countershaft;
- a first reverse countershaft;
- a second reverse countershaft
- wherein the first countershaft has a plurality of odd gears selectively fixed thereto and a rigidly fixed gear attached thereto, wherein the plurality of odd gears are selectively in driving engagement with the plurality of gears on the primary shaft and the rigidly fixed gear is in driving engagement with the first reverse countershaft,
- wherein the second countershaft has a plurality of even gears selectively fixed thereto and a rigidly fixed gear attached thereto, wherein the plurality of even gears are in selective driving engagement with the plurality of gears on the primary shaft and the rigidly fixed gear is in driving engagement with the second reverse countershaft,
- wherein the first reverse countershaft has a plurality of even gears selectively fixed thereto and in selective driving engagement with the plurality of gears on the primary shaft and a rigidly fixed gear attached thereto drivingly engaged with the rigidly fixed gear on the first countershaft,
- wherein the second reverse countershaft has a plurality of odd gears selectively fixed thereto and in selective driving engagement with the plurality of gears on the primary shaft and a rigidly fixed gear attached thereto drivingly engaged with the rigidly fixed gear on the second countershaft.
7 more elements
Dependencies are inferred from the claim text.