Vehicle platooning systems and methods
Systems and methods for coordinating and controlling vehicles, for example heavy trucks, to follow closely behind each other, or linking, in a convenient, safe manner and thus to save significant amounts of fuel while increasing safety. In an embodiment, on-board controllers in each vehicle interact with vehicular sensors to monitor and control, for example, relative distance, relative acceleration/deceleration, and speed. Additional safety features in at least some embodiments include providing each driver with one or more visual displays of forward and rearward looking cameras. Long-range communications are provided for coordinating vehicles for linking, and for communicating analytics to fleet managers or others.
1. In a computerized vehicular convoying control system, a vehicular convoying method for controlling a first vehicle in a convoy with a second vehicle, the convoying method comprising:
communicating data over a communication link between the first vehicle and the second vehicle;
determining a gap to be established and maintained between the first vehicle and the second vehicle;
determining a brake condition while underway for the first vehicle using the steps of:
a) applying the brakes;
b) detecting vehicle braking data using one or more sensors on the vehicle; and
c) calculating the brake condition using the vehicle braking data;
controlling acceleration and deceleration of the first vehicle to maintain the gap between the first vehicle and the second vehicle, wherein the amount of acceleration and deceleration of the first vehicle is based on the brake condition, wherein the brake condition is determined based in part on detected vehicle deceleration of the first vehicle; and
transmitting the brake condition of the first vehicle to the second vehicle.
2. The method of claim 1 , wherein the vehicle braking data comprises one or more of:
1) detected wheel slip(s), and
2) detected vehicle brake pressure.
3. The method of claim 2 , wherein the vehicle brake pressure is vehicle brake air pressure.
4. The method of claim 1 , additionally comprising communicating the calculated brake condition to the driver.
5. The method of claim 1 , additionally comprising communicating the calculated brake condition to a fleet manager using a long range communication link.
6. The method of claim 1 , additionally comprising adjusting the determination of the gap based on the calculated brake condition.
7. The method of claim 1 , additionally comprising determining whether or not the vehicle should be in a convoy based on the calculated brake condition.
8. The method of claim 1 , additionally comprising:
calculating a brake condition for each of the first vehicle and the second vehicle; and,
based on the two calculated brake conditions, determining which of the two vehicles should be the lead vehicle in a convoy.
9. The method of claim 8 , wherein the first vehicle is the follower vehicle, and the second vehicle is the lead vehicle.
10. The method of claim 1 , wherein the step of controlling the acceleration and deceleration comprises commanding engine torque.
11. The method of claim 10 , wherein the step of controlling the acceleration and deceleration also comprises controlling braking.
12. The method of claim 1 , wherein the communication link is a wireless link using at least two inter-vehicular transceivers.
13. The method of claim 1 , wherein at least two inter-vehicular transceivers are further configured to transmit and receive using one or more of:
a radio frequency, a visible spectrum, an infrared spectrum, or an ultraviolet spectrum.
14. The method of claim 13 , wherein the at least two inter-vehicular transceivers are configured to use one or more radio frequencies in a Dedicated Short Range Communications (DSRC) band using the 802.11 p standard.
15. The method of claim 1 , wherein the communication link is a long range communication system comprising a central server.
16. The method of claim 15 , wherein the central server communicates with both the first vehicle and the second vehicle.
17. The method of claim 15 , wherein the communication link provides a data link.
18. The method of claim 1 , wherein the step of controlling the acceleration and deceleration comprises monitoring the gap between the first vehicle and the second vehicle.
19. The method of claim 18 , wherein the step of monitoring the gap between the first vehicle and the second vehicle comprises using at least one of: a radar system or a lidar system.
20. The method of claim 1 , wherein the first vehicle and the second vehicle are tractor trailer trucks.