ENGINE DEVICE

• Main Author: DOI MASAYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 15.03.2018
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To diagnose failure of a pilot injection device.SOLUTION: This embodiment includes: an engine device 21 that can respond to both of a premixed combustion mode of supplying premixed fuel obtained by premixing gas fuel with air into a cylinder 36 and burning the premixed fuel and a diffusion combustion mode of supplying liquid fuel into the cylinder 36 and burning the liquid fuel; a gas supply device 98 for supplying gas fuel into the cylinder 36 in the premixed combustion mode; a pilot injection device 82 for injecting the liquid fuel into the cylinder 36 in the premixed combustion mode; and a main injection device 79 for supplying the liquid fuel into the cylinder 36 in the diffusion combustion mode. In the diffusion combustion mode, by injecting the liquid fuel from the main injection device 79 and injecting the liquid fuel from the pilot injection device 82, a failure diagnosis of the pilot injection device 82 is made.SELECTED DRAWING: Figure 8 【課題】パイロット噴射装置の故障を診断する。【解決手段】ガス燃料を空気に予め混合させた予混合燃料を気筒３６内に供給して燃焼させる予混合燃焼モード並びに液体燃料を気筒３６内に噴射して燃焼させる拡散燃焼モードの両方に対応可能なエンジン装置２１と、予混合燃焼モードで気筒３６内にガス燃料を供給するガス供給装置９８と、予混合燃焼モードで気筒３６内に液体燃料を噴射するパイロット噴射装置８２と、拡散燃焼モードで気筒３６内に液体燃料を噴射するメイン噴射装置７９とを備え、拡散燃焼モードでは、メイン噴射装置７９から液体燃料を噴射すると共にパイロット噴射装置８２から液体燃料を噴射することによって、パイロット噴射装置８２の故障を診断する。【選択図】図８