Automatic time headway setting for adaptive cruise control system
First Claim
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1. An adaptive cruise control system for a vehicle comprising:
- at least one switch to provide a user input;
a sensor to detect a distance from an object in a path of the vehicle;
a control to determine and maintain a desired headway between the vehicle and the object based upon the user input and the detected distance;
wherein the control calculates an actual headway based upon the user input and the detected distance;
wherein the desired headway is a predetermined minimum value when the actual headway is less than the predetermined minimum value; and
wherein the desired headway is a predetermined maximum value when the actual headway is more than the predetermined maximum value.
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Abstract
An adaptive cruise control system automatically sets a desired headway value upon system initiation. If a preceding vehicle is not detected the desired headway is established at a predetermined value. If a preceding vehicle is detected the control compares the actual headway to a predetermined minimum value and predetermined maximum value to select a desired headway. Following the desired headway value being established, the value is stored in the control and the adaptive cruise control system begins customary operations.
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Citations
14 Claims
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1. An adaptive cruise control system for a vehicle comprising:
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at least one switch to provide a user input; a sensor to detect a distance from an object in a path of the vehicle; a control to determine and maintain a desired headway between the vehicle and the object based upon the user input and the detected distance;
wherein the control calculates an actual headway based upon the user input and the detected distance;
wherein the desired headway is a predetermined minimum value when the actual headway is less than the predetermined minimum value; and
wherein the desired headway is a predetermined maximum value when the actual headway is more than the predetermined maximum value. - View Dependent Claims (2, 3, 4, 5)
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6. A method for setting an adaptive cruise control system on a vehicle comprising:
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initiating the adaptive cruise control system with at least one user input; detecting whether an object is in a path of the vehicle with a sensor; calculating an actual headway between the object and the vehicle based upon data from the sensor when an object is detected in the path of the vehicle; determining a desired headway between the vehicle and the object based upon the actual headway by comparing the actual headway to a predetermined minimum and a predetermined maximum;
wherein the desired headway is the actual headway when the actual headway is more than the predetermined minimum and less than the predetermined maximum; andsetting the desired headway. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for setting a headway in an adaptive cruise control system comprising:
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initiating the adaptive cruise control system with a user input; detecting an object in a vehicle path with a sensor; comparing an actual headway between the object and the vehicle to a predetermined minimum time and a predetermined maximum time; and setting a desired headway to the predetermined minimum when the actual headway is less than the predetermined minimum, setting the desired headway to the predetermined maximum when the actual headway is more than the predetermined maximum, and setting the desired headway to the actual headway when the actual headway is more than the predetermined minimum and less than the predetermined maximum. - View Dependent Claims (13, 14)
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Specification