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88 results about "Platoon" patented technology

In transportation, platooning or flocking is a method for driving a group of vehicles together. It is meant to increase the capacity of roads via an automated highway system. Platoons decrease the distances between cars or trucks using electronic, and possibly mechanical, coupling. This capability would allow many cars or trucks to accelerate or brake simultaneously. This system also allows for a closer headway between vehicles by eliminating reacting distance needed for human reaction.

Method for determining a dynamic vehicle distance between a following vehicle and a preceding vehicle of a platoon

The invention relates to a method for determining a dynamic vehicle distance (Adyn) between a following vehicle (FF) and a preceding vehicle (VF) of a platoon, wherein a V2V signal (S1) can be wirelessly transferred between the following vehicle (FF) and the preceding vehicle (VF), comprising at least the following steps: determining a current maximum following-vehicle deceleration (zMax_FF) of the following vehicle (FF); determining a current transfer time for transferring to the following vehicle (FF) the information that the preceding vehicle (VF) has initiated an emergency braking operation (N); determining a current maximum preceding-vehicle deceleration (zMax_VF) of the preceding vehicle (VF); and determining the dynamic vehicle distance (Adyn) from a transfer distance (s) and from abraking distance difference (sB), wherein the transfer distance (s) indicates the distance traveled by the following vehicle (FF) between the initiation of an emergency braking operation (N) by the preceding vehicle (VF) and the initiation of an emergency braking operation (N) by the following vehicle (FF), wherein the transfer distance (s) depends on the current transfer time, and wherein the braking distance difference (sB) indicates a difference between a preceding-vehicle braking distance (w_VF) defined by the maximum preceding-vehicle deceleration (zMax_W) and a following-vehicle brakingdistance (w_FF) defined by the maximum following-vehicle deceleration (zMax_FF).
Owner:WABCO EURO BVBA SPRL

Intelligent energy management method for autonomous platoon driving of parallel type hybrid electric vehicles

The invention discloses an intelligent energy management method for autonomous platoon driving of parallel type hybrid electric vehicles. The method comprises the following steps that a vehicle platoon is established, and the models of the parallel type hybrid electric vehicles in the vehicle platoon and the motion system parameters of the whole vehicles are determined; the working mode of the parallel type hybrid electric vehicles is analyzed to obtain all the driving working modes of the parallel hybrid electric vehicles; according to the vehicle dynamics theory, the dynamic equation of thetransmission system of the whole vehicles is established, and the system efficiency calculation formula under different driving working modes is obtained; the energy management strategy model under the optimal system efficiency condition is established; the headstock distance and the driving vehicle speed requirements of the vehicle platoon are set, and the longitudinal dynamics model of the parallel type hybrid electric vehicle platoon is established; and based on a simulation platform, simulation analysis is carried out. The method has the beneficial effects that the purposes of improving the running safety and the passing efficiency and the fuel economy of the vehicle platoon are effectively improved.
Owner:CHONGQING UNIV OF TECH

A vehicle platoon building map and its adaptive following distance calculation method

The invention discloses a vehicle queue mapping method and a calculation method thereof for an adaptive distance to a following vehicle. The vehicle queue mapping method comprises the following steps:acquiring GPS points on a travel path of a vehicle queue by a map acquisition vehicle, and constructing a characteristic map; numbering each vehicle in the vehicle queue from 1 to n; and enabling each vehicle in the vehicle queue to execute the operations of acquiring own location and speed information, finding the nearest point on the characteristic map according to the own location information,taking displacement of the point in the characteristic map as own displacement, wirelessly sending own number, displacement and speed information to the other vehicles, defining an expected adaptivedistance to the following vehicle according to the own number and speed as well as the received numbers and speeds of the other vehicles and then calculating an error of the distance to the followingvehicle by combining the own displacement and the received displacements of the other vehicles. The vehicle queue mapping method disclosed by the invention can improve accuracy of collaborative calculation of the distance to the following vehicle as well as flexibility of the vehicle queue and gives consideration to traffic flow density and safety of the following vehicle.
Owner:CENT SOUTH UNIV
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