| 摘要 |
PURPOSE:To improve operability, emissivity, thermal efficiency and the like by controlling operation of a subsidiary fuel supply device so as to reduce or lower supply of said fuel when the output of an exhaust density sensor detecting CO2 density is below a predetermined value. CONSTITUTION:Besides supplying fuel directly from a fuel injection nozzle 10 into a combustion chamber 6, subsidiary fuel, which turned to particles due to operation of an oscillator 17 in a subsidiary fuel supply device 13, is mixed with air in a mixing chamber 14 and supplied into an intake passage 5. In such a Diesel engine, the oscillator 17 is controlled by means of a control device 20. This control device 20 inputs a signal of CO2 density prepared by an exhaust density sensor 19 provided in an exhaust passage 7 and a signal of an engine speed prepared by a rotation sensor 21, while it sends out a driving signal to the oscillator 17 to supply subsidiary fuel when CO2 density (d) exceeds a predetermined value do. On the other hand, in case of d<do, the signal of driving is not given to the oscillator 17 and supply of the subsidiary fuel is stopped. |
