Patent ID: 11867132
Assignee: DENSO CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 1:
2. A drive control device for an internal combustion engine, the internal combustion engine including a fuel injection valve, which is configured to inject fuel, an intake timing varying mechanism, which is configured to control opening/closing of an intake valve provided at an intake port, and an exhaust timing varying mechanism, which is configured to control opening/closing of an exhaust valve provided at an exhaust port, the drive control device comprising:
a valve timing control unit configured to execute a wet reduction control to control at least one of the intake timing varying mechanism or the exhaust timing varying mechanism to reduce a fuel wet amount, which is a quantity of fuel adhering to a wall surface of the internal combustion engine facing to an injection field where the fuel is to be injected, by a counterflow blowing back toward the intake port, when a request is made to reduce the fuel wet amount in a startup of the internal combustion engine, and
a cycle determination unit configured to determine whether a current cycle is a first cycle after startup of the internal combustion engine,
a counterflow generation period determination unit configured to determine whether an injection period is equal to or greater than an actual counterflow generation period; and
an injection control unit, wherein
the valve timing control unit is configured to execute, as the wet reduction control, a control to advance a valve closing timing of the exhaust valve ahead of an exhaust top dead center of the internal combustion engine on determination of the cycle determination unit that the current cycle is the first cycle after the startup of the internal combustion engine;
the injection control unit is configured to
to perform a split injection on determination of the counterflow generation period determination unit that the injection period is equal to or greater than the actual counterflow generation period, and
not to perform the split injection on determination of the counterflow generation period determination unit that the injection period is less than the actual counterflow generation period.