Device and method for determining target value of controllable variable associated with vehicle running state
First Claim
1. A device for determining a target value of a controllable variable associated with a running state of a motor vehicle, so that the controllable variable is controlled so as to coincide with the determined target value, comprising:
- detecting means for detecting a currently required output of an engine of the vehicle;
first determining means for determining a basic value depending upon at least the currently required output of the engine detected by said detecting means, said basic value being used as a basis for determining said target value;
sensing means for sensing at least one parameter representative of a running condition of the vehicle, except the currently required output of the engine;
means for defining a plurality of control rules based on said at least one parameter, said control rules being used for compensating said basic value; and
second determining means for determining a compensation factor based on said plurality of control rules according to a fuzzy set theory, so as to compensate said basic value by the determined compensation factor, for obtaining said target value of said controllable variable.
1 Assignment
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Accused Products
Abstract
Device and apparatus for determining a target value of a controllable variable such as a drive torque associated with a running state of a motor vehicle, so that the variable is controlled so as to coincide with the determined target value. Initially, a basic value used as a basis for determining the target value is determined depending upon at least a currently required output of the vehicle engine which is represented by an accelerator pedal operating amount, for example. Then, control rules for compensating the basic value are defined based on at least one parameter indicative of a running condition of the vehicle, such as a vehicle weight and a road gradient. Finally, a compensation factor for compensating the basic value to obtain the target value is determined based on the control rules according to a fuzzy set theory.
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Citations
14 Claims
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1. A device for determining a target value of a controllable variable associated with a running state of a motor vehicle, so that the controllable variable is controlled so as to coincide with the determined target value, comprising:
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detecting means for detecting a currently required output of an engine of the vehicle; first determining means for determining a basic value depending upon at least the currently required output of the engine detected by said detecting means, said basic value being used as a basis for determining said target value; sensing means for sensing at least one parameter representative of a running condition of the vehicle, except the currently required output of the engine; means for defining a plurality of control rules based on said at least one parameter, said control rules being used for compensating said basic value; and second determining means for determining a compensation factor based on said plurality of control rules according to a fuzzy set theory, so as to compensate said basic value by the determined compensation factor, for obtaining said target value of said controllable variable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of determining a target value of a controllable variable associated with a running state of a motor vehicle, so that the controllable variable is controlled so as to coincide with the determined target value, comprising the steps of:
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detecting a currently required output of an engine of the vehicle; determining a basic value depending upon at least the detected currently required output of the engine, said basic value being used as a basis for determining said target value; sensing at least one parameter representative of a running condition of the vehicle, except the currently required output of the engine; defining a plurality of control rules based on said at least one parameter, said control rules being used for compensating said basic value; and determining a compensation factor based on said plurality of control rules according to a fuzzy set theory, so as to compensate said basic value by the determined compensation factor, for obtaining said target value of said controllable variable.
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Specification