Method and apparatus for speed-limit following cruise control
First Claim
1. A method of automatically transitioning a cruise control speed from a current speed zone to a next speed zone, the method comprising the steps of:
- determining a location at which the speed zone limit changes from the current speed limit to the next speed limit forward of a driven vehicle;
determining a speed profile for changing the vehicle speed from the current speed limit to the next speed limit, the speed profile including non-linear changes in the vehicle speed between the current speed zone and the next speed zone for eliminating abrupt changes in the vehicle speed;
determining a relative location for initiating the non-linear changes in the speed of the vehicle; and
actuating the non-linear changes in the speed of the vehicle at the relative location for gradually changing the speed to the next speed limit.
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Abstract
A method is provided for automatically transitioning a cruise control speed from a current speed zone to a next speed zone. A location at which the speed zone limit changes from the current speed limit to the next speed limit forward of a driven vehicle is determined. A speed profile is determined for changing the vehicle speed from the current speed limit to the next speed limit. The speed profile includes non-linear changes in the vehicle speed between the current speed zone and the next speed zone for eliminating abrupt changes in the vehicle speed. A relative location is determined for initiating the non-linear changes in the speed of the vehicle. The non-linear changes are actuated in the speed of the vehicle at the relative location for gradually changing the speed to the next speed limit.
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Citations
20 Claims
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1. A method of automatically transitioning a cruise control speed from a current speed zone to a next speed zone, the method comprising the steps of:
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determining a location at which the speed zone limit changes from the current speed limit to the next speed limit forward of a driven vehicle; determining a speed profile for changing the vehicle speed from the current speed limit to the next speed limit, the speed profile including non-linear changes in the vehicle speed between the current speed zone and the next speed zone for eliminating abrupt changes in the vehicle speed; determining a relative location for initiating the non-linear changes in the speed of the vehicle; and actuating the non-linear changes in the speed of the vehicle at the relative location for gradually changing the speed to the next speed limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. The speed control vehicle system comprising:
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a controller adapted to receive a map data signal indicative of a distance to a next speed limit zone, a signal indicative of a current speed limit, a signal indicative of a next speed limit, and a signal indicative of the current vehicle speed; wherein the controller determines a location at which the speed zone limit changes from the current speed limit to the next speed limit forward of a driven vehicle in response to the map data signal, wherein the controller determines a speed profile for changing the speed from the current speed limit to the next speed limit, the speed profile including a non-linear change in the vehicle speed between the current speed zone and the next speed zone to eliminate abrupt changes in the vehicle speed, wherein the controller determines a relative location for initiating the non-linear change in speed of the vehicle, and wherein the controller is configured for actuating the non-linear change of speed of the vehicle at the relative location for the gradually changing in the vehicle speed to the next speed limit. - View Dependent Claims (18, 19, 20)
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Specification