| 摘要 |
PURPOSE:To improve fuel consumption performance by reducing pump loss through layer combustion in a partial load state, and to increase an output through premix combustion in a maximum output state. CONSTITUTION:An ignition source 14 is provided in the vicinity of a fuel injection valve 13, and air-fuel mixture is ignited after fuel injection, in a partial load state. Frame thus formed is diffused into a cylinder by the injected fuel to cause layer combustion. When the load is increased, soot or the like is generated under the layer combustion. Then, fuel injection is performed several times. Premixture is formed in the cylinder through the initial injections. Frame thus formed is injected into a cylinder, and the premixture is burned in a shor time. Combustion time is thus reduced, and knocking generation is prevented. A compression ratio of an engine, thermal efficiency, and fuel consumption performance are improved. Generation of combustible hydrocarbon is prevented by layered intake. Responsiveness of fuel and operability are improved by inner- cylinder fuel injection. |
