ENGINE DEVICE

• Main Authors: IDOGAWA MASANAO, SUGIMOTO MOTOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 13.12.2021
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To further properly determine a finish of the warmup of an engine which is intermittently stopped.SOLUTION: A finish of the warmup of an engine is determined when an integrated value of a suction air amount after an intermittent stop of the engine when intermittently stopping the engine reaches a threshold or larger which is obtained by using a threshold setting relationship for setting the threshold to a tendency in which the integrated value becomes larger as an intermittent stop time is longer. When the engine is intermittently stopped when the finish of the warmup of the engine is determined by the integrated value of the suction air amount after the intermittent stop, the finish of the warmup of the engine is determined by using a larger value of a value which is obtained by subtracting the integrated value of the suction air amount after the last intermittent stop up to a this-time intermittent stop from the threshold which is used for the determination of the finish of the warmup of the engine after the last intermittent stop, and the threshold which is obtained from the threshold setting relationship with respect to a this-time intermittent stop time.SELECTED DRAWING: Figure 3 【課題】間欠停止されるエンジンの暖機完了をより適正に判定する。【解決手段】エンジンを間欠停止した際に間欠停止後の吸入空気量の積算値が間欠停止時間が長いほど大きくなる傾向に閾値を設定する閾値設定用関係を用いて得られる閾値以上に至ったときにエンジンの暖機完了を判定する。間欠停止後の吸入空気量の積算値によってエンジンの暖機完了が判定されるにエンジンを間欠停止したときには、前回の間欠停止後のエンジンの暖機完了の判定の際に用いた閾値から前回の間欠停止から今回の間欠停止までの吸入空気量の積算値を減じた値と、今回の間欠停止時間に対して閾値設定用関係により得られる閾値と、のうち大きい方の値を閾値として用いてエンジンの暖機完了を判定する。【選択図】図３