Turbo manifold air pressure sensor is more accurate

June 18, 2019 //By Peter Clarke
Turbo manifold air pressure sensor is more accurate
The KP276 manifold air pressure (MAP) sensor from Infineon Technologies AG is suitable for both normally-aspirated and turbo diesel engines and exhaust gas recirculation.

The KP276 digital sensor covers a pressure range of 10 to 400kPa and follows on from the KP275 and has a reduced accuracy error.

The MAP is an important parameter for the calculation of 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 percent (full scale span, FSS) over lifetime, The XENSIV KP276 products are the most accurate digital Turbo MAP sensors in Infineon’s portfolio and will be ISO26262-ready. The KP275 had worst case accuracy error of about 1.5 percent FSS.

The 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 frame length of 846 microseconds and a NTC start-up time of typically 10ms.

The sensors come in an SMD-8 package and are suitable for the harsh conditions in engine management applications. They are qualified for a temperature range from -40°C to 150°C and protected against aggressive media like iodine and exhaust gas condensate.

The XENSIV KP276 series sensors are now available.

Related links and articles:

www.infineon.com

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