EXHAUST EMISSION RECIRCULATION SYSTEM OF INTERNAL COMBUSTION ENGINE WITH TWIN-SCROLL TURBOCHARGER

• Main Author: KATO KENJI
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2017
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; 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; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; 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 provide an exhaust emission recirculation system of an internal combustion engine with a twin-scroll turbocharger which can make exhaust emission efficiently recirculate to a suction passage by utilizing the pulsation of exhaust pressure while suppressing the generation of a variation of torque in the internal combustion engine.SOLUTION: An exhaust emission recirculation system 40 of an internal combustion engine with a twin-scroll turbocharger comprises: a first EGR passage 41 which is branched from a first exhaust passage 13a for introducing exhaust emission discharged from a first cylinder group to a first scroll part 25, and connected to an intake passage 12; and a second EGR passage 42 which is branched from a second exhaust passage 13b for introducing exhaust emission discharged from a second cylinder group to a second scroll part 26, and connected to the intake passage 12. The first EGR passage and the second EGR passage are individually connected to the intake passage without being merged to each other.SELECTED DRAWING: Figure 1 【課題】内燃機関におけるトルク変動の発生を抑制しつつ、吸気通路に排気を排気圧力の脈動を利用して効率よく還流させることができるツインスクロールターボチャージャ付内燃機関の排気還流システムを提供する。【解決手段】ツインスクロールターボチャージャ付内燃機関の排気還流システム４０は、第１気筒グループから排出された排気を第１スクロール部２５に導く第１排気通路１３ａから分岐して吸気通路１２に接続する第１ＥＧＲ通路４１と、第２気筒グループから排出された排気を第２スクロール部２６に導く第２排気通路１３ｂから分岐して吸気通路１２に接続する第２ＥＧＲ通路４２とを備え、第１ＥＧＲ通路及び第２ＥＧＲ通路は、合流することなく別々に吸気通路に接続していることを特徴とする。【選択図】図１