| 摘要 |
PROBLEM TO BE SOLVED: To improve the combustion efficiency, and improve the fuel consumption, in a Miller cycle engine which reduces the compression ratio smaller than the expansion ratio, by closing a air feeding valve earler than the bottom dead center, or latter than the bottom dead center, as well as feeds a fuel and a combustion oxide including gas into a cylinder. SOLUTION: This engine is provided with an air feed system passage and an exhaust system passage, and with an air feed supercharging cooling means A to compress and cool the feeding air. The air feed supercharging cooling means A is composed by furnishing a inlet supercharger 6 and a post supercharger 5 by connecting them in series by making the inlet supercharger 6 at the upstream side of the post supercharger 5 in the air feed system passage, and at the same time, by furnishing coolers 7 and 8 to cool the compressed air, at an air feed system intermediate passage between the inlet supercharger 6 and the post supercharger 5 of the air feed system passage, and at an air feed system downstream side passage between the post supercharger 5 and a cylinder, respectively. In this case, an EGR means B to recirculate a part of the exhaust gas of the passage at the upstream side of the post supercharger 5 of the exhaust system passage to the air feed system intermediate passage is also provided. |
