Drive train comprising an auxiliary engine which is connected to a countershaft of the transmission
AssigneeRENAULT s.a.s.
InventorMichel Raoul
Life of this patent
Estimating the term…
Abstract
A drive train for a motor vehicle including a main engine, an auxiliary engine, and a parallel shaft transmission. The transmission includes: at least one input shaft connected to the main engine by a clutch device, at least one output shaft including a drive pinion that engages with a differential ring gear, a countershaft that is not coaxial with the input and output shafts, and a plurality of synchronizers configured to connect the input shaft to the output shaft selectively in rotation. The countershaft is fitted with a drive wheel connected to the auxiliary engine and that is permanently rotatably linked to the input shaft.
Claims20
A drivetrain for a motor vehicle, including a main engine, an auxiliary engine, and a parallel shaft transmission, which transmission includes at least one primary shaft connected to the main engine by a clutch device, at least one secondary shaft including a drive pinion meshing with a differential ring gear, an intermediate shaft that is not coaxial with the primary and secondary shafts, and a plurality of synchromeshes configured to selectively cause the primary shaft to rotate as one with the secondary shaft, the drivetrain comprising:
- a main primary shaft and an auxiliary primary shaft each selectively connected to the main engine by the clutch device;
- and
- an intermediate shaft including a drive wheel connected to the auxiliary engine and permanently connected in terms of rotation to the primary shafts,
- in which the drive wheel is fixedly mounted on the intermediate shaft, which intermediate shaft includes a pair of fixed step-down pinions, one of the step-down pinions meshing with a fixed pinion belonging to the main primary shaft, and the other step-down pinion meshing with a fixed pinion belonging to the auxiliary primary shaft.
A drivetrain for a motor vehicle, including a main engine, an auxiliary engine, and a parallel shaft transmission, which transmission includes at least one primary shaft connected to the main engine by a clutch device, at least one secondary shaft including a drive pinion meshing with a differential ring gear, an intermediate shaft that is not coaxial with the primary and secondary shafts, and a plurality of synchromeshes configured to selectively cause the primary shaft to rotate as one with the secondary shaft, the drivetrain comprising:
- a main primary shaft and an auxiliary primary shaft each selectively connected to the main engine by the clutch device;
- and
- an intermediate shaft including a drive wheel connected to the auxiliary engine and permanently connected in terms of rotation to the primary shafts,
- in which the intermediate shaft includes an intermediate reverse-gear pinion in mesh with a reverse-gear pinion mounted on the secondary shaft, a reverse-gear synchromesh being mounted on the secondary shaft.
A drivetrain for a motor vehicle, including a main engine, an auxiliary engine, and a parallel shaft transmission, which transmission includes at least one primary shaft connected to the main engine by a clutch device, at least one secondary shaft including a drive pinion meshing with a differential ring gear, an intermediate shaft that is not coaxial with the primary and secondary shafts, and a plurality of synchromeshes configured to selectively cause the primary shaft to rotate as one with the secondary shaft, the drivetrain comprising:
- a main primary shaft and an auxiliary primary shaft each selectively connected to the main engine by the clutch device;
- an intermediate shaft including a drive wheel connected to the auxiliary engine and permanently connected in terms of rotation to the primary shafts;
- a double dog-clutch synchromesh mounted on the secondary shaft contributing to reverse-gear ratios and to a first-gear ratio;
- and
- a freewheel interposed between a sliding gear of the synchromesh and a first-gear idler pinion, the first-gear pinion being the closest pinion on the secondary shaft to the drive pinion.
A drivetrain for a motor vehicle, including a main engine, an auxiliary engine, and a parallel shaft transmission, which transmission includes at least one primary shaft connected to the main engine by a clutch device, at least one secondary shaft including a drive pinion meshing with a differential ring gear, an intermediate shaft that is not coaxial with the primary and secondary shafts, and a plurality of synchromeshes configured to selectively cause the primary shaft to rotate as one with the secondary shaft, the drivetrain comprising:
- a main primary shaft and an auxiliary primary shaft each selectively connected to the main engine by the clutch device;
- an intermediate shaft including a drive wheel connected to the auxiliary engine and permanently connected in terms of rotation to the primary shafts;
- and
- a double synchromesh and a single synchromesh of friction cone type mounted on one of the primary shafts, the double friction-type synchromesh contributing to at least three forward-gear ratios.
Dependencies are inferred from the claim text.