Fuel injection control device for internal combustion

摘要

The purpose of the present invention is to suppress, in an internal combustion engine in which two injectors are disposed in a line upstream and downstream in an intake pipe, adhesion of deposits to the downstream-side injector. In order to suppress such adhesion, a fuel injection control device according to one embodiment of the present invention operates both injectors together when a required fuel injection amount is equal to or greater than a reference value. The reference value is set to a value equal to or greater than the sum of lower limit injection amounts of the injectors. In such case, the fuel injection control device adjusts the proportion of fuel injected from the injector disposed downstream in the intake pipe to be greater than the proportion of fuel injected from the injector disposed upstream in the intake pipe.

主权项

1. A fuel injection control device for an internal combustion engine comprising a first injector that is disposed at an upstream position in an intake pipe and a second injector that is disposed at a downstream position in the intake pipe,
wherein when a requested fuel injection quantity is equal to or greater than a reference value that is set to a value that is equal to or greater than a sum of lower limit injection quantities of the respective injectors, both of the injectors are actuated together while making a proportion of fuel that is injected by the second injector larger than a proportion of fuel that is injected by the first injector and increasing the proportion of fuel that is injected by the first injector in accordance with an increase in an intake air quantity.