CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

An object of this invention is, in an internal combustion engine having of in-cylinder direct injection and port injection, to enable the early elimination of a difference between fuel concentrations of fuel injected from different injection valves that can arise when a mixing ratio of different kinds of fuel contained in the fuel that is used changes significantly. To achieve this, the control device of this invention normally controls a fuel injection amount of each injection valve in accordance with the operating state of the internal combustion engine, while a change arose in the mixing ratio of different kinds of fuel contained in the fuel that is used or while there is a possibility for such a change, the control device controls a fuel injection amount of each injection valve so that fuel is temporarily injected from both the in-cylinder injection valve and the port injection valve.

主权项

1. A control device for an internal combustion engine that includes an in-cylinder injection valve which injects fuel directly into a cylinder and a port injection valve which injects fuel into an intake port, and that is capable of using a fuel in which different kinds of fuel are mixed, comprising
injection control means for controlling a fuel injection amount of the in-cylinder injection valve and a fuel injection amount of the port injection valve in accordance with an operating state of the internal combustion engine; and detection means for detecting at least one of a change in a mixing ratio of different kinds of fuel contained in a fuel that is used and a possibility of the change; wherein, in a case where the detection means detects a change in the mixing ratio of different kinds of fuel contained in the fuel that is used or the possibility of the change, the injection control means controls a fuel injection amount of the in-cylinder injection valve and a fuel injection amount of the port injection valve so that fuel is injected from both of the in-cylinder injection valve and the port injection valve.