Fuel control system of engine

A fuel control system of an engine, the fuel control system controlling, by using a tumble flow, a behavior of fuel directly injected into a combustion chamber formed inside a cylinder of the engine, the fuel control system comprising:

• a fuel injector for directly injecting the fuel into the combustion chamber;
• an ignition plug provided in a center portion of a ceiling of the combustion chamber;
• a piston having a crown face formed with an inclined surface extending along an extending direction pointing obliquely upward from an end portion of the crown face on an opposite side from the fuel injector and extending toward a side where the fuel injector is provided;
• a cavity formed at a center of the crown face of the piston;
• an intake port of the engine configured to generate the tumble flow within the combustion chamber;
• and
• a processor configured to cause the fuel injector to inject the fuel at a first injection timing and then inject a smaller amount of fuel than an amount injected at the first injection timing, in a direction opposing a positive direction of the tumble flow, at a second injection timing, the first injection timing designed to be in an intake stroke of the cylinder, the second injection timing designed to be in a latter half of a compression stroke of the cylinder,
• wherein a length of the inclined surface of the crown face from the end portion of the crown face to the center of the crown face is longer than a diameter of the cavity.

A fuel control system of an engine, the fuel control system controlling, by using a tumble flow, a behavior of fuel directly injected into a combustion chamber formed inside a cylinder of the engine, the fuel control system comprising:

• a fuel injector for directly injecting the fuel into the combustion chamber;
• an intake port of the engine configured to generate the tumble flow within the combustion chamber;
• and
• a processor configured to cause the fuel injector to inject the fuel at a first injection timing and then inject a smaller amount of fuel than an amount injected at the first injection timing, in a direction opposing a positive direction of the tumble flow, at a second injection timing, the first injection timing designed to be in an intake stroke of the cylinder, the second injection timing designed to be in a latter half of a compression stroke of the cylinder,
• wherein the second injection timing is set at a timing when the tumble flow mixes the injected fuel to form rich mixture gas near a tip of an ignition plug.