6 Application
14 ARIADNE Knock Control
6.1 Stand-alone Knock Control Unit
When used as stand-alone unit, ARIADNE’s analog output can directly be wired to the ig-
nition system, transmitting the knock severity measured on the engine (maximum of all
cylinders knock levels). This 4-20mA or 0-5V signal acts as offset on the engine nominal
spark angle. In case of heavy knocking, the engine stop signal is transmitted over digital
output to the speed/load controller. For more precise knock control, a load signal can be
connected to ARIADNE (for example an electrical load measurement or a boost pressure
sensor). Optionally ARIADNE can provide a load reduction algorithm over digital output
or CAN-bus.
Figure 7: Stand-alone Knock Control Unit
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