Miller cycle engine

Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 燃料と燃焼用酸素含有ガスとをシリンダ内に 給気するとともに、給気弁を下死点よりも早く若しくは 遅く閉じて圧縮比を膨張比よりも小さくするミラーサイ クルエンジンにおいて、さらに燃焼効率を向上させ、燃 費の改善を実現することを目的とする。 【解決手段】 給気系流路と排気系流路を備え、給気を 圧縮して冷却する給気過給冷却手段Ａを備え、給気過給 冷却手段Ａは、前段過給機６と後段過給機５を、給気系 流路において前段過給機６を後段過給機５の上流側とし て直列に接続して備えるとともに、圧縮された給気を冷 却する冷却器７，８を、給気系流路の前段過給機と後段 過給機の間の給気系中間流路と後段過給機とシリンダの 間の給気系下流側流路にそれぞれ備えて構成され、排気 系流路の後段過給機の上流側の流路の排気の一部を給気 系中間流路へ還流するＥＧＲ手段Ｂを備えた (57) Abstract: A mirror for supplying a fuel and an oxygen-containing gas for combustion into a cylinder, and closing a supply valve earlier or later than a bottom dead center to make a compression ratio smaller than an expansion ratio. It is an object of the cycle engine to further improve the combustion efficiency and improve the fuel efficiency. SOLUTION: The air conditioner includes an air supply system flow path and an exhaust system flow path, and includes an air supply supercharging cooling means A for compressing and cooling air supply. The post-stage supercharger 5 is provided with the pre-stage supercharger 6 connected in series as an upstream side of the post-stage supercharger 5 in the air supply system flow path, and the coolers 7, 8 for cooling the compressed air supply are provided. An air supply system intermediate flow path between the pre-supercharger and the rear-stage supercharger of the air supply system flow path, and an air supply system downstream flow path between the rear-stage supercharger and the cylinder are provided and configured, respectively. EGR means B for recirculating a part of the exhaust gas in the flow path on the upstream side of the post-stage supercharger of the system flow path to the air supply system intermediate flow path is provided.

Inventors

• 👤 Hiroshi Fujimoto
• 👤 洋 藤本
• 👤 Takao Fujiwaka
• 👤 貴生 藤若
• 👤 Shojiro Matsumura
• 👤 章二朗 松村
• 👤 Masahiro Tsurusaki
• 👤 将弘 鶴崎

Bibliographic Details