INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE OF CYLINDER-INJECTION TYPE

摘要

A injection control device for an internal combustion engine includes a fuel injection valve directly injecting a fuel into a cylinder of the internal combustion engine, and a drive current setting unit setting a drive current of the fuel injection valve according to a fuel pressure that is a pressure of the fuel supplied to the fuel injection valve, using a drive current profile specifying a relation between the fuel pressure and the drive current. When a compression stroke injection injecting the fuel in a compression stroke or an expansion stroke injection injecting the fuel in an expansion stroke is executed, the drive current setting unit sets the drive current using a predetermined profile having no hysteresis in change characteristics of the drive current with respect to the fuel pressure in a fuel pressure region of the compression stroke injection or the expansion stroke injection, as the drive current profile.

主权项

1. An injection control device for an internal combustion engine of a cylinder-injection type, the injection control device comprising:
a fuel injection valve directly injecting a fuel into a cylinder of the internal combustion engine; and a drive current setting unit setting a drive current for the fuel injection valve according to a fuel pressure, using a drive current profile specifying a relation between the fuel pressure and the drive current, the fuel pressure being a pressure of the fuel supplied to the fuel injection valve, wherein when a compression stroke injection that injects the fuel in a compression stroke or an expansion stroke injection that injects the fuel in an expansion stroke is executed in the internal combustion engine, the drive current setting unit sets the drive current using a predetermined profile having no hysteresis in change characteristics of the drive current with respect to the fuel pressure in a fuel pressure region of the compression stroke injection or the expansion stroke injection, as the drive current profile.