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US 12,365,235 B2Granted
Multi-speed hybrid transmission and transmission operating method
AssigneeDana Graziano S.R.L.
InventorEmanuele Rulfi Fertilio
Life of this patent
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Abstract
A hybrid transmission system with a multi-speed gearbox. The multi-speed gearbox is configured to rotationally couple a prime mover and an electric machine to different gear ratios during a hybrid drive mode. The multi-speed gearbox includes an electric drive interface gear positioned coaxial to a first primary shaft and a second primary shaft and idly mounted, free to spin, to the second primary shaft and an output shaft that includes an output shaft gear which is fixedly coupled thereto meshes with a gear on a secondary shaft.
Claims19
A hybrid transmission system comprising:
- a multi-speed gearbox configured to rotationally couple a prime mover and an electric machine to different gear ratios during a hybrid drive mode, the multi-speed gearbox including:
- an electric drive interface gear positioned coaxial to a first primary shaft and a second primary shaft;
- and
- an output shaft that includes an output shaft gear which is fixedly coupled thereto meshes with a first fixed gear that is fixedly coupled to a secondary shaft;
- wherein the electric drive interface gear is axially positioned between a second fixed gear and a third fixed gear that are fixedly mounted to the second primary shaft;
- wherein the electric drive interface gear is idly mounted, free to spin, to the second primary shaft;
- wherein the electric drive interface gear is included in a double gear unit that is idly mounted to the second primary shaft and includes a first idly mounted gear;
- wherein the electric drive interface gear is positioned axially adjacent to the first idly mounted gear;
- wherein the electric drive interface gear meshes with a second idly mounted gear that is idly mounted to the secondary shaft;
- and
- wherein the first idly mounted gear meshes with a third idly mounted gear that is idly mounted to the secondary shaft;
- a first clutch configured to:
- selectively couple the second idly mounted gear to the secondary shaft;
- and
- selectively couple a fourth idly mounted gear to the secondary shaft;
- a second clutch configured to:
- selectively couple the third idly mounted gear to the secondary shaft;
- and
- selectively couple a fifth idly mounted gear to the secondary shaft;
- and
- an electric drive clutch that is configured to:
- selectively couple the first idly mounted gear to the second primary shaft;
- wherein the fourth idly gear meshes with the second fixed gear and the fifth idly mounted gear meshes with the third fixed gear.
20 more elements
A dual-clutch hybrid transmission system, comprising:
- a multi-speed gearbox configured to rotationally couple an internal combustion engine and traction motor to different gear ratios during a hybrid drive mode, the multi-speed gearbox including:
- a traction motor interface gear positioned coaxial to a first primary shaft, a second primary shaft, and the internal combustion engine;
- an output shaft that includes an output shaft gear which is fixedly coupled thereto meshes with a first fixed gear that is fixedly coupled to a secondary shaft;
- and
- a dual-clutch that selectively couples the first and second primary shafts to the internal combustion engine;
- wherein the traction motor interface gear is axially positioned between a second fixed gear and a third fixed gear that are fixedly mounted to the second primary shaft;
- wherein the traction motor interface gear is idly mounted, free to spin, to the second primary shaft;
- wherein the traction motor interface gear is included in a double gear unit that is idly mounted to the second primary shaft and includes a first idly mounted gear;
- wherein the traction motor interface gear is positioned axially adjacent to the first idly mounted gear;
- wherein the traction motor interface gear selectively connects to the second primary shaft and/or the secondary shaft;
- wherein the traction motor interface gear meshes with a second idly mounted gear that is idly mounted to the secondary shaft;
- and
- wherein the first idly mounted gear meshes with a third idly mounted gear that is idly mounted to the secondary shaft;
- a first clutch configured to:
- selectively couple the second idly mounted gear to the secondary shaft;
- and
- selectively couple a fourth idly mounted gear to the secondary shaft;
- and
- a second clutch configured to:
- selectively couple the third idly mounted gear to the secondary shaft;
- and
- selectively couple a fifth idly mounted gear to the secondary shaft;
- and
- an electric drive clutch that is configured to:
- selectively couple the first idly mounted gear to the second primary shaft;
- wherein the fourth idly gear meshes with the second fixed gear and the fifth idly mounted gear meshes with the third fixed gear.
23 more elements
Dependencies are inferred from the claim text.