Knock determination device for internal combustion engine
OwnerKiyoshi Iwade, Shuhei Oe +3inventors
InventorsKiyoshi Iwade, Shuhei Oe, Nobuyuki Murate, Rihito Kaneko, Yuichi Takemura
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Abstract
An engine ECU includes: an A/D (Analog/Digital) converter converting an analog signal transmitted from a knock sensor provided at a cylinder block into a digital signal; a bandpass filter passing only a vibration of a third order tangential resonance mode frequency band; and a bandpass filter passing only a vibration of a fourth order tangential resonance mode frequency band. The engine ECU determines whether the engine knocks, as based on the vibration selected by means of the bandpass filter or bandpass filter.
Claims8
A knock determination device for an internal combustion engine, comprising:
- a vibration detector detecting a vibration of the internal combustion engine;
- an extractor extracting from the detected vibration a vibration of at least one of a third order tangential resonance mode frequency band and a fourth order tangential resonance mode frequency band in a cylinder of said internal combustion engine;
- and
- a determiner determining whether said internal combustion engine knocks, as based on the extracted vibration.
A knock determination device for an internal combustion engine, comprising:
- a vibration detector detecting a vibration of the internal combustion engine;
- an extractor extracting from the detected vibration a vibration of at least 14 kHz;
- and
- a determiner determining whether said internal combustion engine knocks, as based on the extracted vibration.
A knock determination device for an internal combustion engine, comprising:
- means for detecting a vibration of the internal combustion engine;
- extracting means for extracting from the detected vibration a vibration of at least one of a third order tangential resonance mode frequency band and a fourth order tangential resonance mode frequency band in a cylinder of said internal combustion engine;
- and
- determining means for determining whether said internal combustion engine knocks, as based on the extracted vibration.
A knock determination device for an internal combustion engine, comprising:
- means for detecting a vibration of the internal combustion engine;
- extracting means for extracting from the detected vibration a vibration of at least 14 kHz;
- and
- determining means for determining whether said internal combustion engine knocks, as based on the extracted vibration.
Dependencies are inferred from the claim text.