Continental has begun producing urea sensors for more efficient exhaust-gas after treatment in diesel engines. The sensors measure the level, quality, and temperature of the aqueous urea solution in the “AdBlue®” tank, and ensure a lasting reduction in nitrogen-oxide emissions.
The sensor-aided denitrification supports fulfillment of the legal requirements and reinforces drivers’ trust that their car emits no more than the minimum permissible level of nitrogen oxides - The urea sensor employs a measuring principle which is already being successfully used by Continental in oil level sensors
Exhaust-gas after treatment is highly instrumental in further reducing motor vehicle emissions. Alongside reducing CO2 emissions, minimizing the level of harmful nitrogen-oxide emissions is one of the greatest challenges for the automotive industry.
That is why the technology company Continental has been driving forward development of selective catalytic reduction (SCR) technology since 2011.
Many passenger cars and commercial vehicles with diesel engines are already equipped with an SCR system. By making an aqueous urea solution (“AdBlue” or urea solution) react with nitrogen oxides in the engine exhaust, it chemically converts (“reduces”) nitrogen oxide to nitrogen (N2) and water.
The efficiency of this process depends on a precise metering of the amount of urea that is injected, which in turn necessitates a measurement of the urea concentration. To support this new control function, the production of a Continental urea sensor is now being launched for the first time. This sensor will help further optimize SCR and document its effectiveness. The innovative urea sensor can measure quality, level and temperature of the urea solution in the tank. Several vehicle manufacturers intend to use the sensor.