Knock determination device for internal combustion engine

A knock determination device for an internal combustion engine, comprising:

• a crank angle detector detecting a crank angle of said internal combustion engine;
• a waveform detector detecting a waveform of vibration of said internal combustion engine at predetermined crank angle intervals;
• a storage storing in advance a waveform of vibration of said internal combustion engine;
• and
• a determiner determining whether said internal combustion engine knocks, as based on a result of comparing the detected waveform with the stored waveform at timings where a magnitude of vibration decreases in the detected waveform.

A knock determination device for an internal combustion engine, comprising:

• crank angle detecting means for detecting a crank angle of said internal combustion engine;
• waveform detecting means for detecting a waveform of vibration of said internal combustion engine at predetermined crank angle intervals;
• storing means for storing in advance a waveform of vibration of said internal combustion engine;
• and
• determining means for determining whether said internal combustion engine knocks, as based on a result of comparing the detected waveform with the stored waveform at a plurality of timings.

A knock determination device for an internal combustion engine, comprising:

• crank angle detecting means for detecting a crank angle of said internal combustion engine;
• waveform detecting means for detecting a waveform of vibration of said internal combustion engine at predetermined crank angle intervals;
• storing means for storing in advance a waveform of vibration of said internal combustion engine;
• and
• determining means for determining whether said internal combustion engine knocks, as based on a result of comparing the detected waveform with the stored waveform at timings where a magnitude of vibration decreases in the detected waveform.