Single path road geometry predictive adaptive front lighting algorithm using vehicle positioning and map data

A system for predictive adaptive front lighting of a vehicle, the system comprising:

• a first headlamp and a second headlamp configured to cooperatively project a beam pattern;
• a first swivel mechanism coupled to the first headlamp to change a swivel angle of the first headlamp;
• a second swivel mechanism coupled to the second headlamp to change a swivel angle of the second headlamp;
• a controller configured to identify a map location of the vehicle, to determine a most likely path of the vehicle based on the map location, and to calculate a desired swivel angle of the first and second headlamps based on the most likely path of the vehicle;
• and
• wherein the controller is configured to determine a kink point position relative to the most likely path of the vehicle;
• and
• calculate a nominal swivel angle such that the kink point is a predefined distance from a center of a host vehicle lane, the nominal swivel angle is calculated according to the relationship:
• ϕ
• =
• -
• ψ
• +
• ρ
• v
• 3
• ⁢
• l
• +
• ρ
• k
• 6
• ⁢
• l
• -
• D
• l
• where, φ is the nominal swivel angle;
• ψ is a heading angle;
• ρv is the curvature at the vehicle position;
• ρk is the curvature at the kink point;
• l is the distance to the kink point from the vehicle;
• and
• l is the distance to the kink point from the vehicle;
• and
• D is a predefined lateral distance from the center of the host vehicle lane.

A system for predictive adaptive front lighting of a vehicle, the system comprising:

• a first headlamp and a second headlamp configured to cooperatively project a beam pattern;
• a first swivel mechanism coupled to the first headlamp to change a swivel angle of the first headlamp;
• a second swivel mechanism coupled to the second headlamp to change a swivel angle of the second headlamp;
• a controller configured to identify a map location of the vehicle, to determine a most likely path of the vehicle based on the map location, and to calculate a desired swivel angle of the first and second headlamps based on the most likely path of the vehicle;
• and
• wherein the controller is configured to determine a kink point position relative to the most likely path of the vehicle;
• calculate a nominal swivel angle such that the kink point is a predefined distance from a center of a host vehicle lane;
• and
• wherein the controller is configured to calculate the maximum swivel angle based on the relationship so as to minimize glare for on coming traffic:
• ϕ
• L
• =
• -
• ψ
• +
• ρ
• v
• 3
• ⁢
• L
• +
• ρ
• L
• 6
• ⁢
• L
• -
• D
• L
• L
• where, φL is the maximum swivel angle;
• ψ is a heading angle;
• ρv is the curvature at the vehicle position;
• ρL is the curvature at the distance L;
• L is the distance to the point of maximum deviation from the vehicle;
• and
• DL is the lateral deviation at the kink point from the center of the host vehicle center lane.

A system for predictive adaptive front lighting of a vehicle, the system comprising:

• a first headlamp and a second headlamp configured to cooperatively project a beam pattern;
• a first swivel mechanism coupled to the first headlamp to change a swivel angle of the first headlamp;
• a second swivel mechanism coupled to the second headlamp to change a swivel angle of the second headlamp;
• a controller configured to identify a map location of the vehicle, to determine a most likely path of the vehicle based on the map location, and to calculate a desired swivel angle of the first and second headlamps based on the most likely path of the vehicle;
• and
• wherein the controller is configured to determine a kink point position relative to the most likely path of the vehicle;
• calculate a nominal swivel angle such that the kink point is a predefined distance from a center of a host vehicle lane;
• and
• wherein the controller is configured to calculate a maximum swivel angle so as to minimize glare for on coming traffic based the relationship:
• |φf|=min(|φL|,|φ|);
• where, φf is the desired swivel angle;
• φ is the nominal swivel angle;
• and
• φL is the maximum swivel angle.

A method for predictive adaptive front lighting of a vehicle, the method comprising:

• receiving a vehicle position;
• identifying a map location of the vehicle;
• determining a most likely path of the vehicle based on the map location;
• calculating a desired swivel angle for vehicle headlamps based on the most likely path;
• wherein the desired swivel angle is calculated such that a kink point position is determined relative to the most likely path of the vehicle;
• and
• calculating a nominal swivel angle such that the kink point is a predefined distance from a center of a host vehicle lane, according to the relationship:
• ϕ
• =
• -
• ψ
• +
• ρ
• v
• 3
• ⁢
• l
• +
• ρ
• k
• 6
• ⁢
• l
• -
• D
• l
• where, φ is the nominal swivel angle;
• ψ is the heading angle;
• ρv is the curvature at the vehicle position;
• ρk is the curvature at the kink point;
• l is the distance to the kink point from the vehicle;
• and
• D is a predefined lateral distance from the center of the host vehicle center lane.