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US 2009/0288476 A1Published application
Knock detection device for a cobustion engine and a method for a combustion knock detection
AssigneeRobert Bosch GmbH
InventorsFederico BUGANZA, Carsten KLUTH, Oskar TORNO, Werner HAEMING
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Abstract
In the field of knock detection in a combustion engine, a method and a device detects and controls the knock by adapting the gain of an amplifier which amplifies the knock sensor signal. The gain of the amplifier is adapted based on analysis of a set of samples from the knock sensor so that the amplification of the knock sensor signal across the entire measuring window is optimum and the complete ADC evaluation range can be utilized better.
Claims11
A knock detection device for a combustion engine, comprising:
- an amplifier having a variable gain adapted to amplify an analog signal from a knock sensor;
- an analog-to-digital converter adapted to receive the amplified signal from the amplifier and convert the received signal to a digital;
- a signal evaluation device adapted to analyze the digital samples to control the gain of the amplifier;
- and
- a knock detection device adapted to analyze the digital samples to detect a knock in the combustion engine.
2 more elements
A method for knock detection, comprising:
- receiving a knock sensor signal in analog form;
- converting the knock sensor signal from analog form to digital samples;
- analyzing the digital samples;
- based on the analysis of the digital samples, adapting a gain of an amplifier for a next cycle of combustion;
- and
- evaluating the digital samples to find whether a knock occurred or not in the combustion engine.
3 more elements
Dependencies are inferred from the claim text.