Controller for a device in a motor vehicle

Details Controller for a device in a motor vehicle Controller for a device in a motor vehicle

1997-12-22

1999-09-28

Mojica, Virna Lissi

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 61, G06F 770, G06F 1900

Patent

active

059579900

ABSTRACT:
A controller for a motor vehicle device, such as a transmission. The transmission ratio is automatically controlled in dependence on at least the accelerator pedal position and the driving speed, using stored characteristic maps. A fuzzy logic circuit has at least one rule base. Various signals, which characterize driving states and the load state of the motor vehicle, are evaluated by the fuzzy logic circuit and control signals are generated in response. The control signals define the transmission ratio. At a predefined dynamic driving state, an additional control signal is generated by the fuzzy logic circuit, by means of which signal a change to the transmission ratio is carried out. That change is independent of the respective characteristic map. Dynamic driving states of this type are, for example, the occurrence of an impermissible wheel brake slip or driving down relatively long downhill gradients.

REFERENCES:
patent: 5036730 (1991-08-01), Sakai et al.
patent: 5366416 (1994-11-01), Roovers et al.
patent: 5620393 (1997-04-01), Minowa et al.
patent: 5638277 (1997-06-01), Nagai

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