FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

摘要

A fuel injection control device controls fuel injection of a spark-ignition internal combustion engine for direct injection into a cylinder and independently controls circulation of a coolant in a head-side cooling channel and in a block-side cooling channel. The fuel injection control device is provided with a controller that sets a fuel injection timing for cooling the inside of the cylinder such that an intake valve closing timing occurs during a reduction in gas temperature inside the cylinder due to evaporative latent heat of the injected fuel, while the coolant circulates in the head-side cooling channel and the circulation of the coolant in the block-side cooling channel is stopped. The controller injects the fuel based on the fuel injection timing for cooling the inside of the cylinder.

主权项

1. A fuel injection control device for controlling fuel injection to directly inject fuel into a cylinder of a spark-ignition internal combustion engine including a head-side cooling channel that cools a cylinder head, a block-side cooling channel that cools a cylinder block, and for independently controlling circulation of coolant in the head-side cooling channel and in the block-side cooling channel, comprising:
a controller programmed to set a fuel injection timing for cooling the inside of the cylinder such that an intake valve closing timing occurs during a reduction in gas temperature inside the cylinder due to evaporative latent heat of the injected fuel, while the coolant circulates in the head-side cooling channel and the circulation of the coolant in the block-side cooling channel is stopped, the controller being further programmed to inject the fuel based on the fuel injection timing set for cooling the inside of the cylinder.