Motorcycle with device for detecting a vehicle approaching from the rear

A motorcycle comprising

• a frame mounted on wheels and having a front part and a rear part,
• a handlebar being present at the front part,
• detection means on the motorcycle to detect at least the speed and roll angle of the motorcycle when in movement,
• the frame having a longitudinal median plane joining the front part and rear part,
• a device for detecting a vehicle moving towards the rear part of the motorcycle when such motorcycle is in movement,
• said device for detecting comprising a detection device rigidly of one piece with the motorcycle, said detection device comprising a sensor for detecting the speed of the vehicle,
• said detection device being connected to means for evaluating the presence and movement of said vehicle which is moving towards the rear part of the motorcycle, approaching said motorcycle, said evaluation means being capable of activating warning means generating a warning for a rider's attention when said vehicle is detected,
• the evaluation means comprising a component at least capable of determining the speed of a vehicle following the motorcycle,
• wherein the evaluation means operate in relation to the roll angle of the motorcycle, comparing the roll angle of the motorcycle with a threshold value of the angle, the detection means being in particular activated if the roll angle of the motorcycle is less than a predetermined threshold angle value,
• wherein if the motorcycle inclines to a roll angle greater than the threshold value, the sensor is disabled with a consequent warning being provided to the rider;
• wherein the evaluation means define a variable hazard indication which identifies the time to collision between the approaching vehicle and the motorcycle, said indication being defined on the basis of a comparison between the speed of the motorcycle and the speed of the vehicle moving towards the rear part of the motorcycle and a comparison between the relative distances between said motorcycle and said vehicle,
• said warning means being activated whenever the time to collision is less than a predetermined value.