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 spark ignition (SI) combustion through flame propagation and then unburned mixture gas to perform compression ignition (CI) combustion by self-ignition, comprising:

• 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;
• a swirl control valve configured to generate a swirl flow inside the combustion chamber;
• and
• a control unit configured to control the spark plug and the fuel injection valve,
• wherein the control unit 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,
• 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, and
• wherein, when a position at which the spray of the first fuel portion reaches the swirl flow is a first position and a position at which the spray of the second fuel portion reaches the swirl flow is a second position, the spray of the first fuel portion reaches the first position and then moves away from the second position by the swirl flow before the spray of the second fuel portion reaches the second position.

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, comprising:

• a fuel injection valve configured to inject fuel into the combustion chamber;
• a swirl control valve configured to generate a swirl flow inside the combustion chamber;
• and
• a control unit configured to control the fuel injection valve,
• wherein the fuel injection valve 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, and
• wherein, when a position at which the spray of the first fuel portion reaches the swirl flow is a first position and a position at which the spray of the second fuel portion reaches the swirl flow is a second position, the spray of the first fuel portion reaches the first position and then moves away from the second position by the swirl flow before the spray of the second fuel portion reaches the second position.