Sýrefnisskynjar

Súrefnisskynjar, also known as oxygen sensors, are crucial components in modern internal combustion engines. Their primary function is to measure the amount of unburned oxygen in the exhaust gas stream. This information is then relayed to the engine control unit (ECU), which uses it to precisely adjust the fuel-air mixture.

By monitoring oxygen levels, the ECU can optimize combustion for both performance and emissions. If there is too much oxygen, it indicates a lean fuel-air mixture, meaning not enough fuel is being injected. The ECU will then compensate by increasing fuel delivery. Conversely, if there is too little oxygen, it signifies a rich mixture, where too much fuel is present. In this case, the ECU will reduce fuel injection.

The most common type of oxygen sensor is the zirconia sensor, which operates by generating a voltage proportional to the difference in oxygen concentration between the exhaust gas and the ambient air. Another type is the titania sensor. Modern vehicles often employ wideband oxygen sensors, also known as air-fuel ratio sensors, which provide a more linear and accurate measurement of the air-fuel ratio across a wider range.

A malfunctioning súrefnisskynjar can lead to several issues, including poor fuel economy, increased emissions, rough idling, and illumination of the check engine light. Regular maintenance and prompt replacement of faulty sensors are essential for maintaining optimal engine performance and environmental compliance.