Fuel injection control method and fuel injection control device for compression self-ignition engine
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United States of America Patent
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Oct 2, 2018
Grant Date -
Jun 29, 2017
app pub date -
Dec 15, 2016
filing date -
Dec 24, 2015
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Abstract
The compression self-ignition engine fuel injection control device is configured to, during one combustion stroke, perform multiple fuel injections to induce multiple combustions in a cylinder. The fuel injection control device comprises a PCM (70) configured to set an interval between a pre-injection and a main injection in the multiple fuel injections, so as to allow valley regions of a curve indicative of a frequency characteristic of a combustion pressure wave generated by the multiple combustions to fall within respective ranges of a plurality of resonant frequency bands of a structure of an engine body of the engine, wherein the PCM is operable to increase a fuel injection amount of the pre-injection more largely as an engine load becomes lower at the same engine speed.
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