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AssigneeRobert Bosch GmbH
InventorsHorst Magenau, Nikolaus Simon, Heins-Erdam Bollhagen, Siegbert Steinlechner, Berthold Wocher
Estimating the term…
A capacitive sensor includes a plurality of individual condenser elements, each of which consist of a first, preferably circular, electrode and a second, preferably surrounding ring-shaped, electrode, which are mounted on one side of a nonconducting support. A common conductor is connected to each of the first electrodes of condenser elements. A signal can be detected separately from each of the condenser elements via conductors connected separately to the individual second electrodes. To increase the sensitivity and to avoid interference, the remote side of the support opposite to the one side is provided with a third additional electrode, which is at ground potential and also acts as a shield for interfering couplings. The sensor is used for measurement of the fuel film thickness in the intake of an internal combustion engine.
In a capacitive sensor for measurement of a thickness of a fuel wall film in an intake duct of an internal combustion engine, said capacitive sensor comprising an insulating support, a plurality of condenser elements, each of the condenser elements having two electrodes and being mounted on one side of the support, each of said two electrodes being spaced laterally from each other on the one side, and a plurality of electrical conductors for connection of the condenser elements to an analyzer unit for determining the thickness of the film, the improvement comprising a third electrode mounted on another side of the support, the other side being opposite and remote from the one side, and the third electrode being formed and connected as a ground electrode for the laterally spaced electrodes of the condenser elements;
In a capacitive sensor for measurement of a thickness of a fuel wall film in an intake duct of an internal combustion engine, said capacitive sensor comprising an insulating support having a central axis, a plurality of pairs of condenser elements mounted on one side of the support, the condenser elements in each pair of condenser elements being positioned on opposite sides of the central axis of the support and each of the condenser elements having two electrodes and, each of said two electrodes being spaced laterally from each other on the one side of the support by a predetermined distance determined by a sensitivity of the sensor;
Dependencies are inferred from the claim text.