Patent ID: 6782696
Filing Date: 2004-08-31
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A control device for a diesel engine comprising:a fuel injection part for injecting a fuel into a combustion chamber of an engine; an EGR ratio adjusting part for adjusting a recirculation amount of exhaust gas exhausted from the engine into an intake air system; and a controller for controlling the operation of the fuel injection part and the EGR ratio adjusting part, wherein the controller sets up a fuel injection timing of the fuel injection part at an advance side from an injection timing when a smoke emission characteristic indicates a decreasing tendency after indicating an increasing tendency in accordance with an increase in EGR ratio, and at a lag side from an injection timing when the injected fuel gets out of a cavity formed in a piston and gets to a cylinder wall face, and the controller executes a first control mode for controlling the operation of the EGR ratio adjusting part to reduce a smoke emission amount and a NOx emission amount from the engine.