| 摘要 |
PURPOSE:To always carry out effective judgment by finding out a fuel pressure variable rate based on fuel pressure detected inside a fuel system rauging from a fuel injection pump to a fuel injection nozzle, and judging an environment condition (fuel property, secular change of the fuel system, etc.) inside the fuel system from the variable rate. CONSTITUTION:A fuel pressure detection means M3 for detecting fuel pressure Pi inside a fuel system ranging from a fuel injection pump M2 to a fuel injection nozzle M1 is provided in a diesel engine for injecting fuel pressure-fed from the fuel injection pump M2, from the fuel injection nozzle M1. The detected signal is inputted to a fuel pressure variable rate calculation means M4, and an average fuel pressure variation rate DELTAPA is fournd out from one time differentiated value of the fuel pressure Pi, and then a fuel system environment constant rho is fond out by means of an inter-fuel system envoronment judging means M5 from the average fuel pressure variable rate DELTAPA, etc., and then fuel injection control is corrected based on the inter-fuel system environment constant rho. Consequently, excellent injection control is realized by exerting the influence thereof to the environment condition at the time of every fuel injection. |
