Dual clutch powershifting transmission
AssigneeEaton Corporation
InventorsBenjamin Morris, Thomas Joseph Stoltz
Life of this patent
Estimating the term…
Abstract
A dual clutch transmission is provided with first and second coaxial input shafts, at least one mainshaft, and an output shaft that are coaxial with one another. The transmission has a countershaft offset from the first input shaft that supports seven countershaft gear elements drivably connected to respective gear elements on the first and second input shafts and the at least one mainshaft thereby forming seven forward gear meshes for the transmission. The seven forward gear meshes provide at least nine forward gear ratios for the transmission. The transmission is powershiftable between consecutive gear ratios of the at least nine gear ratios such that no torque interrupt occurs during sequential shifts.
Claims20
A dual clutch transmission comprising:
- a first input shaft supporting a first headset gear element and a second headset gear element;
- a second input shaft concentric with the first input shaft and supporting a third headset gear element, a fourth headset gear element, and a fifth headset gear element;
- a mainshaft coaxial with the first input shaft and supporting a pair of mainshaft gear elements;
- and
- a countershaft offset from the first input shaft and supporting seven countershaft gear elements drivably connected to respective gear elements on the first and second input shafts and the mainshaft thereby forming seven forward gear meshes for the transmission, the seven gear meshes providing at least nine forward gear ratios;
- and an output shaft coaxial with and connected to the mainshaft for rotation therewith;
- wherein the transmission is powershiftable between consecutive gear ratios of the at least nine gear ratios such that no torque interrupt occurs during sequential shifts.
A dual clutch transmission comprising:
- a first input shaft supporting a first headset gear element and a second headset gear element;
- a second input shaft concentric with the first input shaft and supporting a third headset gear element, a fourth headset gear element, and a fifth headset gear element;
- a mainshaft coaxial with the first input shaft and supporting a pair of mainshaft gear elements;
- and
- a countershaft offset from the first input shaft and supporting seven countershaft gear elements drivably connected to respective gear elements on the first and second input shafts and the mainshaft thereby forming seven forward gear meshes for the transmission, the seven gear meshes providing at least nine forward gear ratios;
- wherein the transmission is powershiftable between consecutive gear ratios of the at least nine gear ratios such that no torque interrupt occurs during sequential shifts.
Dependencies are inferred from the claim text.