lambdareglering

Lambdaregulering, also known as lambda control or oxygen control, is a system used in internal combustion engines to optimize the air-fuel mixture for combustion. It relies on a lambda sensor, commonly called an oxygen sensor, which is typically located in the exhaust system. This sensor measures the amount of unburned oxygen in the exhaust gases.

The engine control unit (ECU) uses the data from the lambda sensor to adjust the amount of fuel injected into the engine. If the lambda sensor detects too much oxygen, it indicates a lean mixture (too much air, not enough fuel). The ECU then enriches the mixture by injecting more fuel. Conversely, if the sensor detects too little oxygen, it indicates a rich mixture (too much fuel, not enough air). The ECU then leans out the mixture by reducing fuel injection.

The goal of lambdaregulering is to maintain the air-fuel ratio at or very close to the stoichiometric ratio. This is the ideal ratio where all the fuel can be completely burned with the available air, resulting in the most efficient combustion and lowest emissions. By constantly monitoring and adjusting the air-fuel mixture, lambdaregulering helps to improve fuel economy, reduce harmful exhaust emissions like carbon monoxide and nitrogen oxides, and ensure optimal engine performance across various operating conditions. Modern vehicles employ sophisticated multi-point lambda sensing systems to further refine this process.