Hoerbiger Kompressortechnik Holding Gmbh

Henric Andersson

Jakob Olofsson Ängeby

Jan Nytomt

Tomas Carlsson

Anders Göras

Christian Sörqvist

This invention relates to a method for knock detection in a combustion engine, in which combustion is controlled by a control unit (), which comprises the steps of, a) obtaining at least one sensor signal (') carrying information of knock intensity related within a combustion chamber of the combustion engine (); (b) processing the sensor signal (&#x2032;) to obtain a knock intensity related detection variable (z), (c) using said detection variable (z) in said control unit () arranged to avoid a knocking condition in said combustion engine (), if the value (z) of said detection variable indicates knock when compared with a threshold value (T) wherein using two different computations/processes for said processing () of the at least one sensor signal (&#x2032;) to obtain two separate sub-values (y, y), and thereafter combining said sub-values (y, y) to obtain said detection variable (z).

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Karlstad, Sweden

Henric Andersson