| 摘要 |
PROBLEM TO BE SOLVED: To maximize a region of compressed self-ignition combustion by using low-octane fuel and high-octane fuel. SOLUTION: An injection valve injecting the low-octane fuel to an intake port and an injection valve directly injecting the high-octane fuel into inside of a cylinder are provided. In a region of predetermined engine load and engine speed, injection amount of the low-octane fuel and a minus overlap period of an engine valve are controlled in accordance with the cylinder temperature in a compression TDC and engine speed, and a flow of gas inside the cylinder is controlled in accordance with the engine load and the cylinder temperature in the compression TDC. In addition, injection amount of the high-octane fuel is controlled in accordance with the engine load and engine speed, and injection timing of the high-octane fuel is controlled in accordance with the engine speed. COPYRIGHT: (C)2006,JPO&NCIPI |
