Vehicle control system and method therefor
First Claim
1. A method for controlling vehicle operation, which comprises:
- assigning operating conditions of the vehicle on a scale in advance in accordance with a predetermined first principle while establishing degrees thereof;
identifying a position on the scale to determine the degree and carrying out a predetermined calculation with respect to the degree;
selecting or averaging the calculation result in accordance with a predetermined second principle so as to determine a control value corresponding to the selected or averaged value; and
controlling the vehicle operation on the basis of the value.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for electronically controlling vehicle operation vehicle and a method therefor applied to a cruise control, which utilizes fuzzy logic or approximate reasoning in determining a control output. Namely, vehicle operating conditions are assigned on a scale called a universe of discourse having degrees of 0 to 1.0 called membership functions or degrees. The detected conditions are identified on the universe and are then defined by fuzzy labels which are in turn used for retrieving control rules expressed in similar labels. Pertinent control rules are composed in fuzzy relation so as to obtain a scaled or universe value which is then converted into a real numerical value. The value is finally sent to a pulse motor control device which opens or closes a throttle valve in order to maintain the vehicle at a predetermined cruising speed.
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Citations
12 Claims
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1. A method for controlling vehicle operation, which comprises:
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assigning operating conditions of the vehicle on a scale in advance in accordance with a predetermined first principle while establishing degrees thereof; identifying a position on the scale to determine the degree and carrying out a predetermined calculation with respect to the degree; selecting or averaging the calculation result in accordance with a predetermined second principle so as to determine a control value corresponding to the selected or averaged value; and controlling the vehicle operation on the basis of the value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for controlling vehicle operation, which comprises:
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means for detecting operating conditions of the vehicle disposed at an appropriate part of the vehicle; means for receiving the output of the detecting means and for calculating a control value required for vehicle operation; and means for receiving the output of the calculating means and for driving a device required for vehicle operation; said calculating means identifying a current position on a scale onto which operating conditions have been assigned with a degree and calculating a control value with respect to the degree in accordance with a predetermined principle. - View Dependent Claims (10, 11, 12)
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Specification