A Speed limiter is an engine control device which interfaces with the engine control unit (ECU – some people call it brain box) and speedometer of a vehicle to restrict the engine speed once the vehicle reaches a pre-configured speed. A speed limiter may work by reducing the airflow into the vehicle engine, the fuel supply to the engine or adjust the timing of the engine’s ignition system to keep the vehicle from exceeding the preset speed limit imposed by the limiter.
Speed limiters are common on many types of vehicles and are usually compulsory devices equipment on trucks and commercial vehicles in some jurisdictions. Different government agencies may enact Laws that require speed limiters for use in commercial vehicles. The main reason for installing speed limiters is that limiting the speed of these type of vehicles may improve highway safety. In the scenario of a passenger car, the reason for speed limiters is generally to prevent the vehicle from exceeding speeds that may affect certain design limitations and improve safety of the vehicle.
The Federal Road Safety Commission in line with a resolution reached with National Automotive Design and Development Council of Nigeria (NADDC), Standard Organization of Nigeria (SON) and other stakeholders has made it mandatory for all vehicles in Nigeria with emphasis on commercial vehicles (buses, trailers, tankers and trucks) to install Speed Limiting Device.
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