COOLING SYSTEM OF UREA WATER INJECTION NOZZLE OF INTERNAL COMBUSTION ENGINE, INTERNAL COMBUSTION ENGINE, AND COOLING METHOD OF UREA WATER INJECTION NOZZLE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a cooling system of an urea water injection nozzle of an internal combustion engine, the internal combustion engine, and a cooling method of the urea water injection nozzle of the internal combustion engine, capable of surely controlling a flow rate of urea water by the urea water injection nozzle of the internal combustion engine even under a high temperature.;SOLUTION: An urea water injection nozzle 30 is composed of a two-fluid mixing injection nozzle 30 for mixing and injecting urea water U and air Ap supplied from an air pump 34, and the urea water U is supplied to the two-fluid mixing injection nozzle 30 by an urea water supply device. When an engine 10 is in an operation state, the control to supply the air Ap to the two-fluid mixing injection nozzle 30 at all times, is implemented regardless of presence or absence of injection of the urea water U from the two-fluid mixing injection nozzle 30.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT