ENGINE DEVICE

To suppress deterioration of emission in a supercharging region and a scavenging region.SOLUTION: Defining a time required for the fuel injected from a port injection valve to be atomized as an atomization required time, when in a supercharging region and in a scavenging region: timing at which an e...

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Bibliographic Details
Main Authors MURAKAMI SHIGEMI, TSUJI HIROAKI, SUGIMOTO MOTOHIRO, OKA YUSUKE
Format Patent
LanguageEnglish
Japanese
Published 07.03.2024
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Summary:To suppress deterioration of emission in a supercharging region and a scavenging region.SOLUTION: Defining a time required for the fuel injected from a port injection valve to be atomized as an atomization required time, when in a supercharging region and in a scavenging region: timing at which an exhaust valve is closed is set to be start timing to start fuel injection from the port injection valve; timing preceding ignition timing by the atomization required time is set to be final stop timing; a port fuel injection amount by which the fuel is injected from the port injection valve is calculated on the basis of a time from the start timing to the final stop timing; and when the port fuel injection amount is larger than a total fuel injection amount, a fuel injection amount obtained by subtracting the port fuel injection amount from the total fuel injection amount is calculated as a cylinder fuel injection amount to be injected from a cylinder injection valve.SELECTED DRAWING: Figure 3 【課題】過給領域であり且つスカベンジ領域であるときのエミッションの悪化を抑制する。【解決手段】過給領域であり且つスカベンジ領域であるときには、ポート噴射弁から燃料噴射した燃料が霧化するのに必要な時間を霧化必要時間としたときに、排気バルブを閉弁したタイミングをポート噴射弁から燃料噴射を開始する開始タイミングとし、点火時期から霧化必要時間だけ前のタイミングを最終停止タイミングとし、開始タイミングから最終停止タイミングまでの時間に基づいてポート噴射弁から燃料噴射するポート燃料噴射量を計算し、全燃料噴射量よりポート燃料噴射量が大きいときには、全燃料噴射量からポート燃料噴射量を減じて得られる燃料噴射量を筒内噴射弁から燃料噴射する筒内燃料噴射量として計算する。【選択図】図3
Bibliography:Application Number: JP20220135195