ENGINE SYSTEM

• Main Authors: OKAMURA SATOSHI, YAMAMOTO YUKI, KATAKURA YUICHI, SHIMURA HARUKI
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; 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; WEAPONS

PROBLEM TO BE SOLVED: To reduce the temperature of exhaust gas.SOLUTION: An engine system comprises: a No. 3 exhaust port 31 (first exhaust port) provided in a cylinder head 5 and providing communication between a first cylinder and a first exhaust flow passage; a No. 1 exhaust port 34 (second exhaust port) provided in the cylinder head 5 and providing communication between a second cylinder and a second exhaust flow passage; a twin scroll turbocharger communicating with the first exhaust flow passage and the second flow passage, in the inside of which exhaust gases introduced from the first exhaust flow passage and the second flow passage merge together; and an EGR port 32 that is provided in the cylinder head 5, is opened in the No. 3 exhaust port 31 and communicates with an EGR flow passage for recirculating exhaust gas into an intake flow passage. The cylinder head 5 is provided with a communication hole 30 for providing communication between the No. 3 exhaust port 31 and the second exhaust port 34.SELECTED DRAWING: Figure 3 【課題】排気ガスの温度を低減する。【解決手段】エンジンシステムは、シリンダヘッド５に設けられ、第１気筒と第１排気流路とを連通させる３番排気ポート３１（第１排気ポート）と、シリンダヘッド５に設けられ、第２気筒と第２排気流路とを連通させる１番排気ポート３４（第２排気ポート）と、第１排気流路および第２排気流路と連通し、第１排気流路および第２排気流路から導かれた排気ガスが内部で合流するツインスクロールターボと、シリンダヘッド５に設けられ、３番排気ポート３１に開口し、排気ガスを吸気流路に還流させるＥＧＲ流路と連通するＥＧＲポート３２と、を備え、シリンダヘッド５には、３番排気ポート３１と、第２排気ポート３４とを連通する連通孔３０が設けられている。【選択図】図３