11. Tagung "Der Arbeitsprozess des Verbrennungsmotors"
Glow Plug with Integrated Pressure Sensor: A Key Component for Closed-Loop-Combustion Control
Authors
Dipl.-Ing. Hans Houben, Dr. Bernd Last, Frank Pechhold, Christian Pottiez, Entwicklung, BERU AG, Ludwigsburg, Michael Weißbäck, AVL List GmbH, Graz
Year
2007
Summary
BERU has developed a Pressure Sensor Glow Plug (PSG) which will go into mass production in 2007. The measuring principle is a piezo-resistive process in which the heating rod is used as a transmission element to the sensor in the rear area of the glow plug. The measuring sensor detects the cylinder pressure which the engine control unit then uses to regulate combustion. It is the pressure sensor glow plug which has made closed-loop combustion control possible for the first time in a serial engine. This glow plug controls primarily the start of combustion and the centre point by evaluation of the heat release process. As a result the emission regulations which will become stricter in future, especially with regard to NOx, can be satisfied and at the same time fuel consumption can be reduced. Other conceivable applications also include the dynamic determination of TDC, peak pressure control as well as the modelbased assessment of EGR, NOx and the air mass.
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