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US 6,311,114 B1Granted
Controller for an automatic motor vehicle transmission
AssigneeSiemens Aktiengesellschaft
InventorsFriedrich Graf, Werner Hauptmann, Kai Heesche
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Abstract
A controller has characteristic diagram memories and a fuzzy system which detects operating parameters of a motor vehicle and sets a transmission ratio with the aid of the characteristic diagram memory. A driver inputs plus and minus gear shift instructions via an input device. The driver instructions are evaluated during a driving operation by an adaptation circuit, and the shifting behavior of a transmission is adapted to a desired shifting behavior.
Claims9
A controller for an automatic motor vehicle transmission, comprising:
- characteristic diagram memories for storing a transmission shifting behavior as a function of vehicle operating parameters, the transmission shifting behavior being stored as characteristics including at least one of limit shift points and limit shift characteristic curves;
- a fuzzy system connected to said characteristic diagram memories, said fuzzy system detecting the vehicle operating parameters and a vehicle load state and setting a transmission ratio as a function of the vehicle operating parameters and the vehicle load state using the characteristic diagram memories;
- an input device for inputting driver instructions including plus shift instructions and minus shift instructions;
- and
- an adaptation circuit connected to said input device and to said fuzzy system, said adaptation circuit evaluating the driver instructions during a driving operation for adapting the transmission shifting behavior to a driver-desired transmission shifting behavior, and said adaptation circuit superimposing two of the characteristics stored in said characteristic diagram memories in a weighted fashion for setting a transmission shift point.
2 more elements
Dependencies are inferred from the claim text.