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14:30 ics Saal 4
Smart control of electromagnetically driven dosing pumps
Thomas Kramer, TU Dresden, IFD, Germany
Martin Petzold, TU Dresden, IFD
Jürgen Weber, TU Dresden, IFD
Olaf Ohligschläger, Thomas Magnete GmbH
Axel Müller, Thomas Magnete GmbH
Electromagnetically driven dosing pumps are suitable for metering any kind of liquid in motor vehicles in a precise manner. Due to the working principle and the pump design, an undesired noise occurs when the armature reaches the mechanical end stops. The noise can be reduced by an adequate self-learning control of the supply energy using a position estimation and velocity control. Based on preliminary investigations /1/, a method for noise reduction is realised by using a user-friendly, tiny and cost-efficient hardware, which enables a use in series manufacturing. The method requires only a voltage and current measurement as input signals. The core of the hardware is an 8-bit microcontroller with 8 kilobyte flash memory including necessary peripherie. A smart software development enables an implementation of the entire noise reduction method onto the tiny flash memory.