oksygensensoren

An oksygensensor, also known as an oxygen sensor or lambda sensor, is a device used to measure the amount of oxygen in a fluid, most commonly the exhaust gases of an internal combustion engine. Its primary function in automotive applications is to optimize fuel combustion for better engine performance, fuel efficiency, and reduced emissions. By detecting the oxygen content in the exhaust, the sensor provides feedback to the engine control unit (ECU). The ECU then adjusts the air-fuel mixture accordingly, ensuring it remains within the ideal stoichiometric range.

There are two main types of oxygen sensors: zirconia and titania. Zirconia sensors are the most prevalent and operate based on the difference in oxygen concentration between the exhaust gas and the ambient air. They generate a voltage signal proportional to the oxygen level. Titania sensors, while less common, work by changing their electrical resistance based on the oxygen content. Modern vehicles often employ heated oxygen sensors (HO2S), which are equipped with a heating element to bring them to their optimal operating temperature quickly after a cold start, thus improving their responsiveness and accuracy.

The proper functioning of an oxygen sensor is crucial for emissions control systems. A malfunctioning sensor can lead to increased fuel consumption, rough engine idling, the illumination of the "check engine" light, and elevated levels of pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides. Regular inspection and, if necessary, replacement of oxygen sensors are important maintenance tasks for ensuring an engine operates efficiently and environmentally responsibly.