METHOD OF CONTROLLING IGNITION COIL FOR INTERNAL COMBUSTION ENGINE

• Main Authors: ENKAI HIROSHI, FUJII KOJI
• Format: Patent
• Language: English; Japanese
• Published: 26.05.2022
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

To provide a method of controlling an ignition coil suppressed in power consumption and heating.SOLUTION: A method of controlling an ignition coil for an internal combustion engine includes (A) a step of making a predetermined reference energization time T become energization time ta of a primary current of the ignition coil, (B) a step of measuring time tr since the primary current starts to flow until the dropping of power supply voltage of the ignition coil stops while flowing the primary current to the ignition coil during the energization time ta, and (C) a step of updating the energization time ta on the basis of the time tr until the dropping of the power supply voltage stops and the reference energization time T decided from an operation condition of the internal combustion engine at the next energization of the primary current. The updated energization time ta is energization time at the next energization of the primary current.SELECTED DRAWING: Figure 3 【課題】消費電力及び発熱が抑制された点火コイルの制御方法を提供する。【解決手段】この内燃機関用の点火コイルの制御方法は、（Ａ）所定の基準通電時間Ｔを、点火コイルの１次電流の通電時間ｔａとするステップ、（Ｂ）点火コイルに通電時間ｔａの間一次電流を流しつつ、一次電流を流し始めてから点火コイルの電源電圧の降下が止まるまでの時間ｔｒを計測するステップ及び（Ｃ）電源電圧の降下が止まるまでの時間ｔｒと、１次電流の次の通電時の内燃機関の動作条件から決まる基準通電時間Ｔとに基づき、通電時間ｔａを更新するステップを含む。更新された通電時間ｔａが、１次電流の次の通電時の通電時間とされる。【選択図】図３