Nopeusrajoitinjärjestelmät

Nopeusrajoitin, often translated as speed limiter or governor, is a device or system designed to restrict the maximum speed of a vehicle. These devices are common in various types of vehicles, from commercial trucks and buses to some passenger cars and even specialized machinery. The primary purpose of a nopeusrajoitin is to enhance safety by preventing drivers from exceeding predetermined speed limits, which can reduce the severity of accidents and improve overall road safety.

In commercial vehicles, speed limiters are frequently mandated by law to ensure compliance with national and international regulations regarding maximum permissible speeds. This helps to standardize traffic flow and reduce the risk of high-speed collisions. For passenger cars, speed limiters can be a feature of advanced driver-assistance systems (ADAS), sometimes linked to adaptive cruise control or as a standalone function that alerts the driver or intervenes to cap the speed.

The implementation of a nopeusrajoitin can vary. In older vehicles, it might be a mechanical device that limits fuel delivery or throttle opening once a certain engine speed is reached. In modern vehicles, these systems are typically electronic, controlled by the vehicle's engine control unit (ECU) or dedicated software. The driver is usually informed when the speed limiter is active, often through a dashboard indicator. While primarily a safety feature, nopeusrajoittimet can also contribute to fuel efficiency by promoting more consistent and moderate driving speeds.