초록 ▼

In dual fuel engines, it is desirable to have injection of two distinct quantities of liquid fuel. Engines with these operating requirements have typically used two separate fuel injectors, or two separate nozzle assemblies, to satisfy this need. However, these systems can be rather complex and diff

In dual fuel engines, it is desirable to have injection of two distinct quantities of liquid fuel. Engines with these operating requirements have typically used two separate fuel injectors, or two separate nozzle assemblies, to satisfy this need. However, these systems can be rather complex and difficult to control. In addition, engineers have learned that fuel injectors having direct control have better performance which can increase engine efficiency. Therefore, the present invention addresses the needs of engines desiring injection of two distinct quantities of fuel, such as dual fuel engines, by utilizing a direct control fuel injector having a dual concentric check having separate orifices for the pilot and main injections.

대표청구항 ▼

In dual fuel engines, it is desirable to have injection of two distinct quantities of liquid fuel. Engines with these operating requirements have typically used two separate fuel injectors, or two separate nozzle assemblies, to satisfy this need. However, these systems can be rather complex and diff

In dual fuel engines, it is desirable to have injection of two distinct quantities of liquid fuel. Engines with these operating requirements have typically used two separate fuel injectors, or two separate nozzle assemblies, to satisfy this need. However, these systems can be rather complex and difficult to control. In addition, engineers have learned that fuel injectors having direct control have better performance which can increase engine efficiency. Therefore, the present invention addresses the needs of engines desiring injection of two distinct quantities of fuel, such as dual fuel engines, by utilizing a direct control fuel injector having a dual concentric check having separate orifices for the pilot and main injections. -6009709, 20000100, Bailey; US-6012424, 20000100, Meistrick; US-6170474, 20010100, Israel; US-6354254, 20020300, Usko, 123/568.14; US-6439195, 20020800, Warner, 123/321; US-6510824, 20030100, Vorih et al., 123/321; US-20010027773, 20011000, Janak et al., 123/321; US-20020023619, 20020200, Janak et al., 123/321; US-20020056435, 20020500, Yang et al., 123/321 eparate radially inwardly directed first medial opening communicating with the central cylindrical bore at a third selected axial position disposed between the first and the second axial positions, the third axial position closer to the first axial position than to the second, each of the working cylinders further having a separate radially inwardly directed second medial opening communicating with the central cylindrical bore at a fourth selected axial position disposed between the first and the second axial positions, the fourth axial position closer to the second axial position than to the first; each of the working cylinders further comprising a respective axial cam follower slot extending outwardly through the outer wall of the cylindrical block; the selected number