CONTROL DEVICE OF ENGINE

• Main Authors: KAMINAGA TAKASHI, NAGATSU KAZUHIRO, XIE MINGZHAO, MIYAMOTO TORU
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• 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

PROBLEM TO BE SOLVED: To provide a control device of an engine capable improving efficiency in compression self combustion by properly controlling an amount of fresh air in the control device of the engine implementing compression self combustion.SOLUTION: A control device of an engine 1 includes an intake valve 21, and an intake variable valve mechanism 71 for controlling an opening/closing timing of the intake valve 21. The intake variable valve mechanism 71 includes a cam 71d rotated in synchronization with rotation of a crank shaft 15, a pressure chamber 71c in which an engine oil is charged and an oil pressure of the engine oil is changed by motion of the cam 71d, and a solenoid valve 71b connected to the pressure chamber 71c and controlling the oil pressure acting on the intake valve 21 by being opened and closed. The intake variable valve mechanism 71 controls the solenoid valve 71b to retard an opening timing of the intake valve 21 in an intake stroke in accordance with lowering of load on the engine 1 in compression self combustion.SELECTED DRAWING: Figure 7 【課題】圧縮自己燃焼を行うエンジン制御装置において、新気の量を適切に制御することにより、圧縮自己燃焼の効率を高めることができるエンジンの制御装置を提供する。【解決手段】エンジン１の制御装置は、吸気弁２１と、吸気弁２１の開閉時期を制御するための吸気可変動弁機構７１とを備え、吸気可変動弁機構７１は、クランクシャフト１５の回転に同期して回転するカム７１ｄと、内部にエンジンオイルが充填され、カム７１ｄの動作によってエンジンオイルの油圧が変化する圧力室７１ｃと、圧力室７１ｃに接続されており、開閉することにより吸気弁２１に作用させる油圧を制御するソレノイドバルブ７１ｂと、を備えており、吸気可変動弁機構７１は、圧縮自己燃焼の際に、エンジン１の負荷が低いほど、吸気行程において吸気弁２１が開く時期を遅くするようにソレノイドバルブ７１ｂを制御する。【選択図】図７