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In April 2014, Honda began an upgraded model of Activa with a 125 cc (7.6 cu in) engine and rebranded the model as Activa 125. Currently, both Activa-i and Activa 125 are sold in India along with traditional Honda Activa. Honda began selling the Activa-i in India, a cheaper and lighter version of the Activa, in December 2013.
Though this does not give wheel speed (as each wheel in an axle with a differential is able to turn at differing speeds, and neither is solely dependent on the driveshaft for its final speed), under typical driving conditions this is close enough to provide the speedometer signal, and was used for the rear wheel ABS systems on 1987 and newer ...
A small permanent magnet affixed to the speedometer cable interacts with a small aluminium cup (called a speedcup) attached to the shaft of the pointer on the analogue speedometer instrument. As the magnet rotates near the cup, the changing magnetic field produces eddy current in the cup, which itself produces another magnetic field.
Radar speed guns use Doppler radar to perform speed measurements.. Radar speed guns, like other types of radar, consist of a radio transmitter and receiver.They send out a radio signal in a narrow beam, then receive the same signal back after it bounces off the target object.
An active suspension is a type of automotive suspension that uses an onboard control system to control the vertical movement of the vehicle's wheels and axles relative to the chassis or vehicle frame, rather than the conventional passive suspension that relies solely on large springs to maintain static support and dampen the vertical wheel movements caused by the road surface.