Lane change assist system
First Claim
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1. A lane change assist system comprising:
- a host vehicle state detecting device configured to detect a traveling condition of a host vehicle;
a surrounding vehicle detecting device configured to detect a plurality of other vehicles located around the host vehicle;
a lane detecting device configured to detect a lane in which the host vehicle is traveling; and
a processing unit configured toset a target lane for a lane change,determine a start and an ending of a lane change assist,set a predicted period for an evaluation of the lane change to the target lane,determine locations of a plurality of gaps around at least one of the plurality of other vehicles that is located in the target lane,obtain a plurality of appropriate speed ranges, at least one appropriate speed range for each of the plurality of gaps, andselect a target vehicle speed of the host vehicle from the plurality of appropriate speed ranges.
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Abstract
A lane change assist system is comprised of a host vehicle state detecting device that detects a host vehicle traveling condition, a surrounding vehicle detecting device that detects other vehicle located around the host vehicle, a lane detecting device that detects a lane around the host vehicle, and a processing unit. The processing unit is arranged to set a target lane, to determine a period of a lane change assist, to set a predicted period for an evaluation of a lane change to the target lane based on a prediction, to obtain an appropriate speed range during the predicted period for each gap, and to select a target vehicle speed from the appropriate speed range.
62 Citations
16 Claims
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1. A lane change assist system comprising:
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a host vehicle state detecting device configured to detect a traveling condition of a host vehicle; a surrounding vehicle detecting device configured to detect a plurality of other vehicles located around the host vehicle; a lane detecting device configured to detect a lane in which the host vehicle is traveling; and a processing unit configured to set a target lane for a lane change, determine a start and an ending of a lane change assist, set a predicted period for an evaluation of the lane change to the target lane, determine locations of a plurality of gaps around at least one of the plurality of other vehicles that is located in the target lane, obtain a plurality of appropriate speed ranges, at least one appropriate speed range for each of the plurality of gaps, and select a target vehicle speed of the host vehicle from the plurality of appropriate speed ranges. - View Dependent Claims (2, 6, 7, 8, 9, 11, 12, 13)
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3. A lane change assist system comprising:
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a host vehicle state detecting device that detects a traveling condition of a host vehicle; a surrounding vehicle detecting device that detects other vehicle located around the host vehicle; a lane detecting device that detects a lane around the host vehicle; a processing unit arranged to set a target lane, to which the host vehicle changes a traveling lane from the detected lane, to determine a start and an ending of a lane change assist, to set a predicted period for an evaluation of a lane change to the target lane, on the basis of a prediction, to obtain an appropriate speed range in which the host vehicle executes the lane change during the predicted period for each of gaps between other vehicles traveling on the target lane, and to select a target vehicle speed of the host vehicle from the appropriate speed range; and a lane decreased point detecting device that detects a lane decreased point at which a number of lanes ahead of the host vehicle is decreased, the lane decreased point detecting device sends information indicative of a distance between the host vehicle and the lane decreased point and a lane decreased at the lane decreased point, wherein the processing unit sets an adjacent lane as the target lane and starts the lane change assist when the host vehicle is put in a forcible lane change condition in which the distance between the host vehicle and the lane decreased point is smaller than a predetermined distance and the lane on which the host vehicle travels is the decreased lane, and the processing unit is further arranged to terminate the lane change assist when a determination is made that a lane change to the target lane has been completed. - View Dependent Claims (4, 5, 10)
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14. A lane change assist system comprising:
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a host vehicle state detecting device that detects a traveling condition of a host vehicle; a surrounding vehicle detecting device that detects other vehicle located around the host vehicle; a lane detecting device that detects a lane around the host vehicle; and a processing unit arranged to set a target lane, to which the host vehicle changes a traveling lane from the detected lane, to determine a start and an ending of a lane change assist, to set a predicted period for an evaluation of a lane change to the target lane, on the basis of a prediction, to obtain an appropriate speed range in which the host vehicle executes the lane change during the predicted period for each of gaps between other vehicles traveling on the target lane, and to select a target vehicle speed of the host vehicle from the appropriate speed range; wherein the processing unit is further arranged to predict future behaviors of the host vehicle and other vehicle around the host vehicle to mathematically evaluate a control input of the host vehicle from the future behaviors produced by the control input, to obtain a pattern of a recommended acceleration/deceleration manipulation of the host vehicle and a pattern of a lane change operation of the host vehicle from the predicted future behaviors and future vehicle group behaviors and the evaluation of the control input, wherein the processing unit is further arranged to have an evaluation criterion of evaluating a set vehicle speed of a controllable parameter from a smallness of a difference between the host vehicle speed and the set vehicle speed, and to set the set vehicle speed as the target vehicle speed.
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15. A method of assisting a lane change of a host vehicle, comprising:
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detecting a traveling condition of a host vehicle; detecting a plurality of other vehicles located around the host vehicle; detecting a lane in which the host vehicle is traveling; executing a setting of a target lane for a lane change and a determination of a start and an ending of a lane change assist; setting a predicted period for an evaluation of the lane change to the target lane; determining locations of a plurality of gaps around at least one of the plurality of other vehicles that is located in the target lane, obtaining a plurality of appropriate speed ranges, at least one appropriate speed range for each of the plurality of gaps; and selecting a target vehicle speed of the host vehicle from the plurality of appropriate speed ranges.
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16. A lane change assist system comprising:
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host vehicle state detecting means for detecting a traveling condition of a host vehicle; surrounding vehicle detecting means for detecting a plurality of other vehicles located around the host vehicle; lane detecting means for detecting a lane in which the host vehicle is traveling; assist operation controlling means for executing setting a target lane for a lane change determining a start and an ending of a lane change assist; predicted period setting means for setting a predicted period for an evaluation of the lane change to the target lane; appropriate speed range calculating means for determining locations of a plurality of gaps around at least one of the plurality of other vehicles that is located in the target lane, and obtaining a plurality of appropriate speed ranges, at least one appropriate speed range for each of the plurality of gaps; and target speed setting means for selecting a target vehicle speed of the host vehicle from the plurality of appropriate speed ranges.
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Specification