Forward collision risk reduction
First Claim
Patent Images
1. A method for operating a forward collision risk reduction system of a vehicle comprising:
- operating a sensor to detect a foreign object;
operating an electronic control unit to determine, based at least in part upon signals received from the sensor, a type of the foreign object and at least one of a velocity and an acceleration of the foreign object;
establishing a safety zone to be avoided by the vehicle defined relative to and extending from the foreign object and having a width measured relative to the foreign object and approximately perpendicular to a direction of movement of the vehicle, the width set to a first value based on the type of the foreign object;
determining a traffic behavior of the foreign object based on the at least one of the velocity and the acceleration;
determining if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors; and
if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors, modifying the width of the safety zone to a second value in accordance with a predetermined species function corresponding to the species.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for determining a safety zone of a foreign object for a forward collision risk reduction system. The method may include determining the type of the foreign object; setting the safety zone to a predetermined value corresponding to the type of the foreign object; determining the traffic behavior of the foreign object; determining if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors; and if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors, modifying the safety zone in accordance with a predetermined species function corresponding to the species.
-
Citations
20 Claims
-
1. A method for operating a forward collision risk reduction system of a vehicle comprising:
-
operating a sensor to detect a foreign object; operating an electronic control unit to determine, based at least in part upon signals received from the sensor, a type of the foreign object and at least one of a velocity and an acceleration of the foreign object; establishing a safety zone to be avoided by the vehicle defined relative to and extending from the foreign object and having a width measured relative to the foreign object and approximately perpendicular to a direction of movement of the vehicle, the width set to a first value based on the type of the foreign object; determining a traffic behavior of the foreign object based on the at least one of the velocity and the acceleration; determining if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors; and if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors, modifying the width of the safety zone to a second value in accordance with a predetermined species function corresponding to the species. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. For use with a forward collision risk reduction system of a vehicle traveling a roadway, a method comprising the steps of:
-
operating a sensor to detect a foreign object approaching the roadway; operating an electronic control unit to determine a type of the foreign object, and determine a deceleration of the foreign object; establishing a safety zone to be avoided by the vehicle, the safety zone defined relative to and extending from the foreign object and having a width set to be a first value based on the type of the foreign object; modifying the width of the safety zone from the first value to a second value based on the deceleration. - View Dependent Claims (19)
-
-
20. For use with a forward collision risk reduction system of a vehicle, a method comprising the steps of:
-
operating a sensor to detect a foreign object; operating an electronic control unit to determine a type of the foreign object and determine at least one of a velocity and a deceleration of the foreign object; establishing a safety zone to be avoided by the vehicle, the safety zone defined relative to and extending from the foreign object and having a width of a first value based on the type of the foreign object; determining a behavior of the foreign object based on the at least one of the velocity and the acceleration; determining if the traffic behavior corresponds to a plurality of a predetermined group of traffic behaviors; if the traffic behavior corresponds to one of a plurality of a predetermined group of traffic behaviors, modifying the width of the safety zone from the first value to a second value in accordance with the corresponding one of the plurality of predetermined group of traffic behaviors; and determining at least one of; i. if the vehicle can avoid entering the safety zone by determining a braking threat number (BTN), the braking threat number (BTN) being the deceleration (decreq) required to avoid entering the safety zone divided by the maximum available deceleration (decavail) for the vehicle; ii. if the vehicle can avoid entering the safety zone by determining a steering threat number (STN), the steering threat number (STN) being the lateral acceleration (alat,req) required to avoid entering the safety zone divided by the maximum available lateral acceleration (alat,avail) for the vehicle; and iii. if the vehicle can avoid entering the safety zone by determining that the vehicle cannot avoid entering the safety zone when each one of the braking threat number (BTN) and the steering threat number (STN) exceeds a predetermined threat number threshold value (BTNmax, STNmax).
-
Specification