Method and system for knock detection

US8099996B2 · kind B2 · utility

Assignee

• Hoerbiger Kompressortechnik Holding GmbH · AT

Inventors

• Jan Nytomt · Sri Ganganagar, IN
• Anders Göras · Sri Ganganagar, IN
• Jakob Angeby · Karlstad, SE
• Henric Andersson · San Jose, US
• Christian Sörqvist · Hultsfred, SE
• Tomas Carlsson · Åmål, SE

Key dates

• Filing date: Aug 28, 2006
• Grant date: Jan 24, 2012
• Expiry date: Dec 22, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L23/225
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

This invention relates to a method for knock detection in a combustion engine, in which combustion is controlled by a control unit (2), which comprises the steps of, a) obtaining at least one sensor signal (4, 4′) carrying information of knock intensity related within a combustion chamber of the combustion engine (1); (b) processing the sensor signal (4, 4′) to obtain a knock intensity related detection variable (z1), (c) using said detection variable (z1) in said control unit (2) arranged to avoid a knocking condition in said combustion engine (1), if the value (z1) of said detection variable indicates knock when compared with a threshold value (T) wherein using two different computations/processes for said processing (5, 6) of the at least one sensor signal (4, 4′) to obtain two separate sub-values (y1, y2), and thereafter combining said sub-values (y1, y2) to obtain said detection variable (z1).