Continuously variable vehicle transmission
AssigneeZF Friedrichshafen AG
InventorGerhard Gumpoltsberger
Life of this patent
Estimating the term…
Abstract
A continuously variable vehicle transmission (1) having one variator (2), for ex., a belt drive transmission, for continuous ratio adjustment and a multi-step transmission (4), for ex., a planetary transmission having at least one input and one output shaft (7, 8) and at least two forward gears and at least one reverse gear. According to the invention a reversal of direction of rotation takes place between the input and the output shaft (7, 8) in the multi-step transmission (4) by means of the two or more gears and the reverse gear(s) is/are designed so that no reversal of direction of rotation occurs between the input and the output shaft (7, 8).
Claims18
A continuously variable vehicle transmission (1) having a variator transmission (2, 3, 23) for continuously variable ratio adjustment and transfer of power sequentially in series along a single power flow path to a multi-step transmission (4) having at least one input shaft (7), an output shaft (8) and at least two forward gears and at least one reverse gear,
- wherein said input shaft (7) and said output shaft (8) rotate in opposite directions of rotation when said multi-step transmission (4) is operating in any of the at least two forward gears and said input shaft (7) and said output shaft (8) rotate in the same direction of rotation when said multi-step transmission (4) is operating in the at least one reverse gear.
A continuously variable vehicle transmission (1) comprising a variator transmission (2, 3, 23), for continuously variable ratio adjustment, sequentially connected with a multi-step transmission (4) having at least one input shaft (7) and an output shaft (8), and the multi-step transmission (4) has at least two forward gears and at least one reverse gear and being sequentially connected with an axial differential (9), whereby driving power passes along a single power flow path sequentially from the variator transmission (2, 3, 23) to the multi-step transmission (4) and from the multi-step transmission (4) the axial differential (9);
- wherein an output shaft (6) of the variator is coaxial with the input shaft (7) of the multi-step transmission (4), and during operation of the multi-step transmission (4) in the at least two forward gears, the input shaft (7) and the output shaft (8) rotate in opposite directions of rotation, and, during operation of the multi-step transmission (4) in the at least one reverse gear, the input shaft (7) and the output shaft (8) rotate in the same direction of rotation.
A continuously variable vehicle transmission (1) comprising a variator transmission (2, 3, 23), for continuously variable ratio adjustment, sequentially connected with a multi-step transmission (4) having at least one input shaft (7) and an output shaft (8), and the multi-step transmission (4) has at least two forward gears and at least one reverse gear and being sequentially connected with an axial differential (9), whereby driving power passes along a single power flow path sequentially from the variator transmission (2, 3, 23) to the multi-step transmission (4) and from the multi-step transmission (4) the axial differential (9);
- wherein the multi-step transmission (4) is a double planetary gear and, during operation of the multi-step transmission (4) in the at least two forward gears, the input shaft (7) and the output shaft (8) rotate in opposite directions of rotation, and, during operation of the multi-step transmission (4) in the at least one reverse gear, the input shaft (7) and the output shaft (8) rotate in the same direction of rotation, and the output shaft (8) of the multi-step transmission (4) supports a gear and an input to the axial differential (9) supports a gear which directly mates with the gear supported by the output shaft (8) so as to reverse the rotational direction of the driving power outputted from the multi-step transmission (4).
Dependencies are inferred from the claim text.