Fuel injection device of engine

A fuel injection device of an engine formed with a combustion chamber having a bottom surface formed by a piston for reciprocating inside a cylinder along a center axis thereof, causing a mixture gas to start SI combustion through flame propagation and then unburned mixture gas to perform CI combustion by self-ignition, comprising:

• a tumble port configured to generate an inclined swirl flow in the combustion chamber flowing obliquely with respect to a center axis of the combustion chamber;
• a spark plug configured to ignite in a center portion of the combustion chamber;
• a fuel injection valve configured to inject the fuel into the combustion chamber from a radial center of a ceiling of the combustion chamber;
• a swirl control valve configured to generate the inclined swirl flow inside the combustion chamber in combination with the tumble port;
• and
• a controller configured to control the spark plug and the fuel injection valve,
• wherein the controller controls the fuel injection valve to inject the fuel at a given injection timing after the swirl flow generation, and controls the spark plug to ignite at a given ignition timing after the fuel injection, and
• wherein the fuel injection valve, when injecting the fuel at the injection timing, injects a plurality of fuel portions at least including a first fuel portion and a second fuel portion of which sprays reach the swirl flow generated by the swirl control valve, the spray of the first fuel portion reaching the swirl flow and then the spray of the second fuel portion reaching a position to which the first fuel portion moves by the swirl flow.