CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD

• Main Author: MIWA JUNICHI
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To effectively suppress corrosion of a nozzle hole portion facing a cylinder inner side of a cylinder inner injector.SOLUTION: A control device for an internal combustion engine includes: a temperature estimation section 110 for estimating a temperature of a nozzle hole portion of an injector 15 on the basis of an operating state of the internal combustion engine 10; a humidity estimation section 120 for estimating humidity in a cylinder faced by the nozzle hole portion of the injector 15 on the basis of intake air state amount of the internal combustion engine 10; a corrosion estimation section 130 for estimating corrosion of at least the nozzle hole portion of the injector 15 on the basis of the estimated temperature and humidity; and a control section 140 for performing corrosion suppression control for lowering the humidity of a cylinder inner side C in accordance with the estimated corrosion.SELECTED DRAWING: Figure 4 【課題】筒内インジェクタの筒内に臨む噴口部の腐食を効果的に抑制する。【解決手段】内燃機関１０の運転状態に基づいてインジェクタ１５の噴口部の温度を推定する温度推定部１１０と、内燃機関１０の吸気状態量に基づいて、インジェクタ１５の噴口部が臨む筒内の湿度を推定する湿度推定部１２０と、推定される温度及び、湿度に基づいて、少なくともインジェクタ１５の噴口部の腐食を推定する腐食推定部１３０と、推定される腐食に応じて筒内Ｃの湿度を低下させる腐食抑制制御を実施する制御部１４０とを備えた。【選択図】図４