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Philips, Siemens sensor system improves fuel efficiency

Posted: 10 Nov 2003 ?? ?Print Version ?Bookmark and Share

Keywords:royal philips electronics? magnetoresistive sensor? siemens vdo automotive? kma200?

Royal Philips Electronics has developed a magnetoresistive sensor that is designed for automotive angular measurement applications including electronic throttle control (EGAS) and variable valve timing (VVT). Jointly developed by Philips and Siemens VDO Automotive AG, the KMA200 sensor will provide car manufacturers with a more reliable and accurate solution for automotive angular measurement.

Based on the same magnetoresistive technology, the product features a self-monitoring function to allow it to automatically detect failures in any part of the sensor system and quickly force the vehicle into fail-safe mode.

The KMA200 includes a variable angular range of up to 180 and precision measurement with accuracy better than 0.6. The device's performance is due to the fact that the sensor varies its resistance straight to the direction of the magnetic field to provide a straight measurement of the angle.

The pre-calibrated product also features 13-bit digital or 2x analog output voltages, which are user configurable to suit the requirements of a number of applications, as well as maximum reverse polarity of 16.5V, an over voltage of up to 32V and a resolution better than 0.1.

Samples of the sensor are available from Philips with mass production starting in Q1 2004. Throttles with the embedded KMA200 are also available from Siemens VDO Automotive.

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