Pierburg Ag

G&uuml;nter Liedtke

Thomas Wienecke

Karl-Heinrich L&ouml;sing

Christian Witty

Rainer Krinitz

An air-mass sensor having an air mass sensor module provided with two temperature sensors ( ) and two heat sensors ( ) which are incorporated into two separately acting bridges (I, II) whose bridge output signals (U , U , U ) are supplied to a microprocessor ( ) incorporated on a common support with the air-mass sensor module. The microprocessor ( ) is calibrated such that crude bridge signals (U , U , U ) measured in a base mode are inscribed in support places (x , x , x ) of support place tables (St , St ). A customer characteristic curve is filed in the form of measurement points (m , m , m ) in the support place tables (St , St ) and are utilized to adjust the crude bridge signals.

Air-mass sensor

A temperature regulator, circuit for an air-mass flow meter in which the temperature regulator circuit includes a bridge circuit one of whose bridge branches contains a temperature resistor of substantially higher resistance than a heating resistor in the other bridge branch. The resistance element of the temperature resistor normally requires a large amount of space on the sensor for this purpose. In order to reduce the size of the resistance element, a voltage divider is provided to reduce the input voltage applied to the temperature resistor. In order to maintain the bridge balance, additional circuit elements are provided in the other bridge branch containing the heating resistor.

Growing community of inventors

Essen, Germany

Günter Liedtke

Growing community of inventors

Essen, Germany

G&uuml;nter Liedtke

Günter Liedtke