Method and device for knock recognition of an internal combustion engine

US10508963B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Matthias Biehl · Krottelbach, DE
• Carsten Kluth · Stuttgart, DE
• Jasmin Dieringer · Stuttgart, DE

Key dates

• Filing date: Sep 19, 2017
• Grant date: Dec 17, 2019
• Expiry date: Mar 29, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L23/227
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and a device are provided for knock recognition of an internal combustion engine, which device Fourier-transforms, weights in frequency-dependent fashion, and sums a signal of a knock sensor in order to produce a first knock signal. Here, from a multiplicity of first knock signals, a concentration point of the multiplicity of the first knock signals is determined, and a first offset value is subtracted from the first knock signal in order to form a second knock signal, the first offset value being ascertained from the concentration point of the multiplicity of the first knock signals, and a second knock signal that has a value below zero being set to the value zero. The further-processed second knock signal is then evaluated as knocking or non-knocking.