Pre-ignition determining apparatus for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNorihito Hanai, Masanori Toya
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Abstract
A pre-ignition determining apparatus for an internal combustion engine using hydrogen as fuel is configured to determine an occurrence of pre-ignition based on an output value of a vibration sensor provided in the internal combustion engine. The pre-ignition determining apparatus includes processing circuitry that is configured to execute an accumulation process of calculating an accumulated value of the output value within a prescribed period prior to an ignition timing of an air-fuel mixture, and a determination process of determining the occurrence of pre-ignition based on the accumulated value.
Claims10
An apparatus configured to determine an occurrence of pre-ignition based on an output value of a vibration sensor provided in an internal combustion engine using hydrogen as fuel, the apparatus comprising:
- processing circuitry,
- wherein the processing circuitry is configured to execute:
- a filtered signal generation process of receiving an output signal of the vibration sensor in a detection period, which is a predetermined period prior to an ignition timing of an air-fuel mixture, and generating a filtered signal by performing a filtering process on the output signal;
- an absolutizing process of generating an absolute value signal obtained by converting the filtered signal into an absolute value;
- an accumulation process of calculating an accumulated value of the absolute value signal within the detection period;
- and
- a determination process of determining the occurrence of pre-ignition based on the accumulated value.
Dependencies are inferred from the claim text.