Förfarande och anordning för knackningskontroll

摘要

(57) Abstract The idea of the invention is that a knock control (6) works together with another control entity that is called as safety control (8). In order that cooperation between these units runs efficiently they are constructed in an inventive way. The safety unit (8) provides safety control commands fast in cases where the response of the knock control (6) does not influence to the conditions of the cylinder/s in a desired way. In other words, the invention provides a new arrangement for handling the knocking with fast response characteristics.