Shift device for an automatic transmission of a vehicle
AssigneeZF Friedrichshafen AG
InventorsMarkus Henneken, Friedemann Jauch, Franz-Josef Schuler, Thomas Mauz, Michael Kiefer
Life of this patent
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Abstract
A shift device for an automatic transmission of a vehicle, particularly of a motor vehicle, is proposed in which the request to change the current ratio of the automatic transmission upon reaching preset operating states of the vehicle can be automatically generated or by manual input in a manual shifting mode. A pulse counter is here provided by way of successive pulses and manual input can be functionally interlinked wherein a shift signal can be generated depending on the linkage.
Claims12
A shift device for an automatic transmission of a vehicle, particularly of a motor vehicle, in which a command to change a current ratio of said automatic transmission (3) upon reaching preset operating states of the vehicle can be generated automatically or by manual input in a manual shifting mode, the shift device comprising:
- a pulse counter (18) for functionally interlinking a plurality of successive pulses in a manual input by adding up pulses for the upshift (+) or working off pulses for the downshift (−);
- a counter value determined by said pulse counter (18) being increased during a pulse for the upshift (+) and decreased during a pulse for the downshift (−), a shifting signal is generated according to the interlinkage of the plurality of successive pulses;
- and
- wherein a shifting signal for a multiple upshift can be issued while the vehicle is parked and said shifting signal for multiple upshift can be issued while the vehicle is parked when a load pedal position is less than a maximum threshold value.
A shift device for an automatic transmission of a vehicle, particularly of a motor vehicle, in which a command to change a current ratio of said automatic transmission (3) upon reaching preset operating states of the vehicle can be generated automatically or by manual input in a manual shifting mode, the shift device comprising:
- a pulse counter (18) for functionally interlinking a plurality of successive pulses in a manual input by adding up pulses for the upshift (+) or working off pulses for the downshift (−);
- a counter value determined by said pulse counter (18) being increased during a pulse for the upshift (+) and decreased during a pulse for the downshift (−), a shifting signal is generated according to the interlinkage of the plurality of successive pulses;
- a shifting signal for a multiple upshift can be issued while the vehicle is parked;
- and
- wherein a request to start off from a vehicle stoppage to a higher ratio step is stored when after starting off to the higher ratio step within a preset time window a vehicle stoppage is detected before an applicable speed limit and a preset maximum load pedal position are reached.
Dependencies are inferred from the claim text.