CONTROL DEVICE OF DIESEL ENGINE

• Main Author: OYAGI HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To improve ignitability at a start, in a diesel engine in which a helical port and a tangential port are connected to the same cylinder.SOLUTION: In a diesel engine 10 comprising: a first intake valve 16 arranged in a helical port 14 connected to a cylinder; a second intake valve 18 arranged at a tangential port 12 connected to the cylinder, and having a larger working angle than the first intake valve 16; and a variable valve mechanism 20 which can independently change opening timing of the first intake valve 16 from the opening timing of the second intake valve 18, the variable valve mechanism 20 is controlled so that the opening timing of the first intake valve 16 is retarded more than the opening timing of the second intake valve 18.SELECTED DRAWING: Figure 6 【課題】ヘリカルポートとタンジェンシャルポートとが同一の気筒に接続されたディーゼルエンジンにおいて、始動時の着火性を向上させられるようにする。【解決手段】気筒に接続されたヘリカルポート１４に配置された第１吸気バルブ１６と、上記気筒に接続されたタンジェンシャルポート１２に配置され、第１吸気バルブ１６よりも作用角の大きい第２吸気バルブ１８と、第１吸気バルブ１６の開き時期を第２吸気バルブ１８の開き時期と独立して変更可能な可変動弁機構２０と、を備えるディーゼルエンジン１０において、始動時に、第１吸気バルブ１６の開き時期が第２吸気バルブ１８の開き時期よりも遅角するように可変動弁機構２０を制御する。【選択図】図６