Control of automated following in vehicle convoys
Disclosed herein are a method and apparatus for automated following behind a lead vehicle. The lead vehicle navigates a path from a starting point to a destination. The lead vehicle and the following vehicle are connected via V2V communication, allowing one or more following vehicles to detect the path taken by the lead vehicle. A computerized control system on the following vehicle (a Follow-the-Leader, or FTL, system) allows the following vehicle to mimic the behavior of the lead vehicle, with the FTL system controlling steering to guide the following vehicle along the path previously navigated by the lead vehicle. In some embodiments, the lead vehicle and following vehicle may both use Global Navigation Satellite System (GNSS) position coordinates. In some embodiments, the following vehicle may also have a system of sensors to maintain a gap between the following and lead vehicles.
1. A method for causing a rear vehicle to follow a front vehicle, comprising:
in response to a driver of the front vehicle activating an FTL (Follow-the-Leader) session;
establishing a wireless communication link between a front vehicle and a rear vehicle, wherein the wireless communication link transmits front vehicle information including information about its steering angle, engine torque, and braking system; and
beginning the FTL session, wherein the FTL session comprises:
transmitting, from the first vehicle to the rear vehicle, the information about the front vehicle's steering angle, engine torque, and braking system; and
commanding engine torque, a braking system, and steering at the rear vehicle without input from a driver, wherein the commanding of the engine torque, the braking system, and the steering is based on the information about the front vehicle's steering angle, engine torque, and braking system, and wherein the commanding of the engine torque, the braking system, and the steering eliminates the need for driver input.
2. The method of claim 1 , wherein the rear vehicle transmits information associated with its brakes to the front vehicle via the wireless link.
3. The method of claim 1 , wherein the information about the front vehicle's steering angle, engine torque, and braking system is received from one or more electronic control units (ECUs), abstracted into data that can be provided to a different make of vehicle.
4. The method of claim 3 , wherein the FTL session further comprises:
providing instructions to one or more ECUs located in the rear vehicle, wherein the instructions are at least partially converted in order for the ECUs located in the rear vehicle to operate correctly, and wherein instructions are based at least in part on the abstracted data.
5. The method of claim 1 , wherein the rear vehicle and the front vehicle can switch positions.
6. The method of claim 1 , further comprising:
ending the FTL session.
7. The method of claim 6 , wherein ending the FTL session comprises:
causing the rear vehicle to pull off of a road.
8. The method of claim 6 , wherein ending the FTL session comprises:
causing the rear vehicle to operate in a fully autonomous mode.
9. The method of claim 8 , further comprising:
causing the rear vehicle to travel to a designated location.
10. The method of claim 1 , wherein the commanding of the engine torque, braking system, and steering at the rear vehicle causes the rear vehicle to perform maneuvers differently than if the rear vehicle were operating in a fully autonomous mode.