ENGINE

• Main Authors: TERAMOTO JUN, MASUDA YUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To estimate a compression ratio accurately.SOLUTION: An engine comprises: a compression ratio variable mechanism that displaces a top dead center position of a piston; a first sensor Sa that detects a first detection target, which is linked to the operation of a crankshaft and is in a fixed position regardless of the displacement of the top dead center position of the piston; and a second sensor Sb that detects the second detection target, which is linked to the movement of the crankshaft and the displacement of the top dead center position of the piston.SELECTED DRAWING: Figure 5 【課題】圧縮比を精度よく推定する。【解決手段】エンジンは、ピストンの上死点位置を変位させる圧縮比可変機構と、クランクシャフトの動作に連動し、かつ、ピストンの上死点位置の変位に拘らず定位置である第１検出対象を検出する第１センサＳａと、クランクシャフトの動作に連動し、かつ、ピストンの上死点位置の変位に連動する第２検出対象を検出する第２センサＳｂと、を備える。【選択図】図５