Transmission control with a fuzzy logic controller
First Claim
1. In a control for a motor vehicle transmission, through which transmission gears are automatically shifted as a function of at least a driving pedal position and vehicle speed on the basis of shifting performance graphs stored in a memory, and in dependence on a load state of the motor vehicle and the driving style of the driver, the improvement comprising:
- a fuzzy logic controller with a rule base, for evaluating various signals representing driving states of the motor vehicle, and thereupon generating the following control signals;
a first correcting signal representing the load state of the motor vehicle, and a second correcting signal representing the driving style, bringing about a switchover to corresponding shifting performance graphs, andan inhibit signal preventing shifting events that would produce a dynamically unfavorable driving state.
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Accused Products
Abstract
A control for a motor vehicle transmission automatically shifts transmission gears as a function of at least a driving pedal position and vehicle speed on the basis of shifting performance graphs stored in memory, and takes a load state of the motor vehicle and the driving style of the driver into account. A fuzzy logic controller with a rule base evaluates various signals characterizing driving states of the motor vehicle, and thereupon generates the following control signals: a first correcting signal characterizing the load state of the motor vehicle, and a second correcting signal characterizing the driving style, bringing about a switchover to corresponding shifting performance graphs; and an inhibit signal preventing shifting events that would produce a dynamically unfavorable driving state.
67 Citations
7 Claims
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1. In a control for a motor vehicle transmission, through which transmission gears are automatically shifted as a function of at least a driving pedal position and vehicle speed on the basis of shifting performance graphs stored in a memory, and in dependence on a load state of the motor vehicle and the driving style of the driver, the improvement comprising:
a fuzzy logic controller with a rule base, for evaluating various signals representing driving states of the motor vehicle, and thereupon generating the following control signals; a first correcting signal representing the load state of the motor vehicle, and a second correcting signal representing the driving style, bringing about a switchover to corresponding shifting performance graphs, and an inhibit signal preventing shifting events that would produce a dynamically unfavorable driving state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification