ENGINE SYSTEM

To suppress abnormal combustion generated with water injected into a combustion chamber when an engine load is relatively high.SOLUTION: An engine system 100 comprises: an engine 1; a water injection device 4 which injects heated water into a combustion chamber 11; an accelerator opening sensor SN1...

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Bibliographic Details
Main Authors NAGASAWA TAKESHI, KIYOSUE RYO
Format Patent
LanguageEnglish
Japanese
Published 17.01.2022
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Summary:To suppress abnormal combustion generated with water injected into a combustion chamber when an engine load is relatively high.SOLUTION: An engine system 100 comprises: an engine 1; a water injection device 4 which injects heated water into a combustion chamber 11; an accelerator opening sensor SN1 which detects an accelerator opening; and a controller 10 which controls the water injection device 4 so as to inject water into the combustion chamber 11 during a compression stroke. The controller 10: acquires demand torque to be applied to a vehicle on the basis of the accelerator opening; acquires a demand engine load which is a load of the engine 1 according to the demand torque; and controls the water injection device 4 so as to make a water injection amount smaller when the demand engine load is in a first load region R1 than when the demand engine load is in a second load region R2 which is lower than the first load region R1.SELECTED DRAWING: Figure 5 【課題】エンジン負荷が比較的高いときに水を燃焼室内に噴射することで発生する異常燃焼を抑制する。【解決手段】エンジンシステム100は、エンジン1と、加熱された水を燃焼室11内に噴射する水噴射装置4と、アクセル開度を検出するアクセル開度センサSN1と、圧縮行程中において水を燃焼室11内に噴射させるように水噴射装置4を制御するコントローラ10と、を有する。コントローラ10は、アクセル開度に基づき、車両に付与すべき要求トルクを取得し、要求トルクに応じたエンジン1の負荷である要求エンジン負荷を取得し、要求エンジン負荷が第1負荷領域R1内にある場合に、要求エンジン負荷が第1負荷領域R1よりも低い第2負荷領域R2内にある場合よりも、水噴射量を少なくするように水噴射装置4を制御する。【選択図】図5
Bibliography:Application Number: JP20200113903