Aprilia SRV 850 conquers another first: after being deservedly crowned as the most powerful, fastest and technological scooter on the market today, it has also become the first (and one of the only) in the maxi sport segment to have the double ABS/ATC system, thus reaching a level of technical sophistication until now reserved for the most exclusive motorcycles on the market.
The ABS system keeps the wheels from locking up during braking or on wet asphalt; ATC ensures maximum rear tyre grip, even during the bolder type acceleration permitted by the plentiful power of the twin cylinder 90° V mounted on the SRV 850. Safety and control are at the service of all in urban commuting as well as during sport riding outside of the city environment.
The ABS and ATC systems installed on the SRV 850 each use a dedicated electronic control unit, directly connected to the two sensors located on both wheels which read motion by means of specific tone wheels. Therefore, despite the fact that they use the same sensors, the activity directed toward two systems is different: for the ABS, the detection systems located on the wheels measure their speed instantaneously. When deceleration of one is greater than that of the other, the system is activated. The electronic control unit sends the signal to another hydraulic type control unit through a servo valve which removes or restores pressure to the hydraulic system until reaching a value which allows grip to be recovered, preventing the tyres from locking up. This way the best braking performance possible is obtained, depending on the conditions of the asphalt, guaranteeing stability for the vehicle and safety for the rider.
For the ATC system, the two speed sensors allow the control unit to determine the vehicle's speed of progress at any given time, informing the engine ECU through the sophisticated CAN-bus communication system. When the rotation speed of the traction wheel is found to be greater than that of the front wheel, the control unit determines the slippage of the rear wheel and intervenes on the ignition advance and injection timing to limit the driving torque produced by the engine, thereby preventing loss of grip. This way the rider can focus on the task at hand with the guarantee of always having the best possible transfer of power to the ground. The Aprilia SRV 850 ABS/ATC traction control system, in addition to being turned on or off, can also be adjusted to one of two positions. The sensitivity in Sport mode (indicated by the special warning light on the instrument panel) is less intrusive and therefore perfect for providing the most satisfying sport ride experience possible for the more adventurous rider possible, with the certainty that the ATC system will intervene if absolutely necessary. The goal of the operating logic in standard mode, on the other hand, is to keep the rider, no matter how experienced, safe in any conditions, both weather and asphalt and it is the ideal solution for day to day city riding.
The presence of sensors on the wheels, the sliding button on the right hand electrical block (which controls the ATC operating mode) and the adhesive decals, distinguish the Aprilia SRV 850 ABS/ATC version.