5 ARIADNE Design and Features
ARIADNE Knock Control 11
5 ARIADNE Design and Features
ARIADNE monitors up to 20 separate vibration sensors (industry standard wide-band
piezoelectric vibration sensors, Bosch-type or compatible ones) placed on the engine
block or cylinder heads. In most cases one unit can protect a whole engine equipped with
one knock sensor per cylinder. For engines with more than 20 cylinders, 2 units can easily
be connected over CAN-bus.
Figure 4: Typical Knock Sensor, Bosch-Type
ARIADNE makes use of dedicated Digital Signal Processors to suppress all kind of knock
sensor signal corruptions, for instance due to vibrations caused in normal operation by the
different gas engine components. Configurable knock measuring windows, digital ampli-
fiers, band-pass filters and integrators are provided ensuring that the knock level calculat-
ed by ARIADNE fairly reflects the real knock intensity inside the cylinder. Of course all
parameters (limit values, gains …) are configurable and can be made, for instance, speed-
or load-dependant.
Figure 5: ARIADNE functional Overview
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