Shifting device for a motor vehicle continuously variable transmission
AssigneeZF Friedrichshafen AG
InventorsWolfgang Runge, Walter Frei, Anton Welte
Life of this patent
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Abstract
In a shifting device such as generally used in automatic transmissions, a regulating device (15) is provided by the swiveling of which to a shifting gate (13) the automatic multiplication stages can be preselected. Besides, the regulating device can be transferred to a second shifting gate (14) via a transverse gate (17). According to the invention, in the second shifting gate (14) a characteristic field (1) is influenced by a continuously variable incremental or decremental change of individual operation parameters or a combination of at least two parameters. The operation parameters consist of the engine speed, the transmission ratio and the output speed.
Claims8
A shifting device (11) for a continuously variable transmission (10) of a motor vehicle, said shifting device (11) including a manually actuatable regulating device (15) for, during an operating mode, automatically selecting and adjusting a ratio of said continuously variable transmission (10), depending on operational parameters of the motor vehicle and, during an additional operating mode, allowing manual actuation of said regulating device (15);
- wherein said operational parameters of the motor vehicle consist of the engine speed (nM), the transmission ratio (U) and the output speed (n.sub.AB) and, during said additional mode of operation, a characteristic field (1) is influenceable by a change of at least one individual operational parameter of the motor vehicle, and actuation of said regulating device (15) supplies at least one of an analog and a digital output signal to an electronic control unit (12) coupled to said regulating device (15).
A shifting device (11) for a continuously variable transmission (10) of a motor vehicle, said shifting device (11) including a manually actuatable regulating device (15) for, during an operating mode, automatically selecting and adjusting a ratio of said continuously variable transmission (10), via signals, depending on operational parameters of the motor vehicle and, during an additional operating mode, allowing manual actuation of said regulating device (15);
- wherein said operational parameters of the motor vehicle consist of the engine speed (nM), the transmission ratio (U) and the output speed (n.sub.AB) and, during said additional mode of operation, a characteristic field (1) is influenceable by a change of at least one individual operational parameter of the motor vehicle and, during manual actuation of said regulating device (15), a working point within the characteristic field (1) is one of incrementally adjustable and continuously variable adjustable.
Dependencies are inferred from the claim text.