CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

• Main Authors: TAKAGI NOBORU, AKIYAMA SHOICHI, TAKAOKA TOSHIO, TANAKA HIROKAZU, AOYAGI TAKAHIKO
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2022
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; CRANKCASE VENTILATING; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

To improve fuel economy by controlling a clearance between a piston and a cylinder bore wall.SOLUTION: A control device of an internal combustion engine is provided, the internal combustion engine comprising a piston cooling device cooling a piston, and a cooling water circulation device circulating cooling water thereby cooling a cylinder bore wall, the control device of the internal combustion engine comprise: a piston cooling device control section causing the piston cooling device to cool the piston when a piston estimation temperature is equal to or higher than a preset threshold of a piston temperature; and a cooling water circulation device control section suppressing the circulation of the cooling water by the cooling water circulation device when a cylinder bore wall temperature is equal to or lower than a preset threshold of a cylinder bore wall temperature.SELECTED DRAWING: Figure 7 【課題】ピストンとシリンダボア壁との隙間を制御することで燃費性能を向上させることを課題とする。【解決手段】内燃機関の制御装置は、ピストンを冷却するピストン冷却装置と、冷却水を循環させてシリンダボア壁を冷却する冷却水循環装置と、を備えた内燃機関の制御装置であって、ピストン推定温度が予め定められたピストン温度に関する閾値以上であるときに前記ピストン冷却装置による前記ピストンの冷却を実行するピストン冷却装置制御部と、シリンダボア壁温度が予め定められたシリンダボア壁温度に関する閾値以下であるときに前記冷却水循環装置による前記冷却水の循環を抑制する冷却水循環装置制御部と、を備える。【選択図】図７