Fuel injection detecting device
AssigneeDenso Corporation
InventorsMinoru Imai, Naoyuki Yamada
Life of this patent
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Abstract
A fuel injection detecting device computes an actual fuel-injection-end timing based on a rising waveform of the fuel pressure detected by a fuel sensor during a period in which the fuel pressure increases due to a fuel injection rate decrease. The rising waveform is modeled by a modeling formula. A reference pressure Ps(n) is substituted into the modeling formula, whereby a timing “te” is obtained as the fuel-injection-end timing.
Claims14
A fuel injection detecting device detecting a fuel injection condition, the fuel injection detecting device being applied to a fuel injection system in which a fuel injector injects a fuel accumulated in an accumulator, the fuel injection detecting device comprising:
- a fuel pressure sensor provided in a fuel passage fluidly connecting the accumulator and a fuel injection port of the fuel injector, the fuel pressure sensor detecting a fuel pressure which varies due to a fuel injection from the fuel injection port;
- and
- a fuel-injection-end timing computing means for computing an actual fuel-injection-end timing based on a rising waveform of the fuel pressure during a period in which the fuel pressure increases due to a fuel injection rate decrease.
Dependencies are inferred from the claim text.