At the Sensor+Test trade fair, Infineon Technologies is presenting the new XENSIV absolute pressure sensor series KP276. It addresses applications such as the measurement of manifold air pressure (MAP) in aspirated or turbo (Turbo MAP) diesel and gasoline engines as well as exhaust gas recirculation.
The digital sensor covers a pressure range of 10 to 400kPa, achieves a very high accuracy, and provides fast measurement and communication.
The MAP is an important parameter to calculate the air-fuel ratio provided to the engine. Precise measurement helps increase combustion efficiency and thus reduce harmful emissions. In addition, manifold pressure data can be used to compute diagnostics of leakages and malfunctions of the exhaust gas recirculation valve.
With an accuracy error of 0.77% (full scale span, FSS) over lifetime, XENSIV KP276 products are the most accurate digital Turbo MAP sensors in Infineon’s portfolio. An even more precise (0.5% FSS) product version is already planned. Furthermore, this version will be ISO26262 ready, providing all the analyses and documentation necessary for safety-critical applications.
XENSIV KP276 sensors integrate the signal processing for an external NTC temperature sensor. This allows to provide both the pressure and the temperature signal on only one digital interface. The devices have a SENT interface with a short frame length of 846 µs and a short NTC start-up time of typically 10ms. This leads to a faster measurement and transmission of the data compared to previous Infineon products.
The sensors come in a robus SMD-8 package and are suitable for the harsh conditions in engine management applications. They are qualified for a temperature range from -40 to +150°C and protected against aggressive media like iodine and exhaust gas condensate.