Headlight control device and method for vehicles
First Claim
1. A headlight control device for vehicles comprising:
- means for manually switching an illumination state of a headlight between a first illumination state and a second illumination state where the amount of illumination to a distance is larger than that in the first illumination state;
means for detecting a traveling condition of the vehicle; and
an electronic control unit including means for automatically switching the illumination state of the headlight and means for learning a threshold value;
whereinthe automatically switching means is configured to switch the illumination state of the headlight between the first illumination state and the second illumination state based on the threshold value depending upon the traveling condition detected by the detecting means;
the learning means is configured to learn a new threshold value for determining switching between the first illumination state and the second illumination state based on the traveling condition detected by the detecting means when the illumination state of the headlight is manually switched by the manually switching means, andthe automatically switching means is configured to determine the switching between the first illumination state and the second illumination state by using the new threshold value for determining the switching over learned by the learning means.
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Accused Products
Abstract
If a beam state of headlight is manually switched over in a manual control mode, threshold values of vehicle speed, steering angle or the like, are learned for determining the switching over to the low-beam state or to the high-beam state based on the results detected by a speed sensor, illumination sensor, steering angle sensor and weather sensor, and are stored in a nonvolatile memory. In an automatic control mode, a CPU determines the switching over to the low-beam state or to the high-beam state based on the traveling condition detected by the illumination sensor by using the threshold values for determining the switching over learned in the manual control mode. The CPU automatically switches over the state of the beam of the headlight based upon the determination result.
19 Citations
15 Claims
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1. A headlight control device for vehicles comprising:
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means for manually switching an illumination state of a headlight between a first illumination state and a second illumination state where the amount of illumination to a distance is larger than that in the first illumination state; means for detecting a traveling condition of the vehicle; and an electronic control unit including means for automatically switching the illumination state of the headlight and means for learning a threshold value;
whereinthe automatically switching means is configured to switch the illumination state of the headlight between the first illumination state and the second illumination state based on the threshold value depending upon the traveling condition detected by the detecting means; the learning means is configured to learn a new threshold value for determining switching between the first illumination state and the second illumination state based on the traveling condition detected by the detecting means when the illumination state of the headlight is manually switched by the manually switching means, and the automatically switching means is configured to determine the switching between the first illumination state and the second illumination state by using the new threshold value for determining the switching over learned by the learning means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A headlight control method for vehicles comprising:
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detecting a traveling condition of a vehicle; automatically switching an illumination state of a headlight between a first illumination state and a second illumination state depending upon a comparison of a detected traveling condition with a threshold value, the amount of illumination to a distance being larger in the second illumination state than that in the first illumination state; and learning a new threshold value for determining automatic switching between the first illumination state and the second illumination state based on the traveling condition detected when the illumination state of the headlight is manually switched over by a manual switch. - View Dependent Claims (12, 13, 14)
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15. A headlight control device for vehicles comprising:
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means for manually switching an illumination state of a headlight between a first illumination state and a second illumination state where the amount of illumination to a distance is larger than that in the first illumination state; means for detecting a traveling condition of the vehicle; and an electronic control unit including means for automatically switching the illumination state of the headlight and means for changing a threshold value;
whereinthe automatically switching means switches the illumination state of the headlight between the first illumination state and the second illumination state based upon the threshold value and depending upon the traveling condition detected by the detecting means; the changing means changes the threshold value for determining switching between the first illumination state and the second illumination state based on the traveling condition detected by the detecting means when the illumination state of the headlight is manually switched by the manually switching means, and the automatically switching means determines the switching between the first illumination state and the second illumination state by using the changed threshold value for determining the switching changed by the changing means.
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Specification