COMBUSTION STATE DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE AND COMBUSTION STATE DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE

To accurately detect a combustion state of an internal combustion engine by using a detection signal of a resolver.SOLUTION: A combustion state of an internal combustion engine 1 is detected by using damper characteristics of a damper 2 connecting a front end of an electric motor rotating shaft 6 and a rear end of a crank shaft 4 and a detection signal of a resolver 7 mounted to the electric motor rotating shaft 6. The detection signal of the resolver 7 is converted into a signal that is not affected by the damper 2 by using the damper characteristics. Thus, the combustion state of the internal combustion engine 1 can be accurately detected by using the detection signal of the resolver 7 mounted to an electric motor 3.SELECTED DRAWING: Figure 1 【課題】レゾルバの検出信号を用いて内燃機関の燃焼状態を精度良く検出する。【解決手段】電動機回転軸６の前端とクランクシャフト４の後端とを連結するダンパー２のダンパー特性と、電動機回転軸６に取り付けられたレゾルバ７の検出信号と、を用いて内燃機関１の燃焼状態を検出する。レゾルバ７の検出信号は、ダンパー特性を用いることで、ダンパー２の影響がない信号に変換される。これによって、内燃機関１の燃焼状態は、電動機３に取り付けられたレゾルバ７の検出信号を用いて精度良く検出することができる。【選択図】図１