Patent ID: 6789753
Filing Date: 2004-09-14
Classification: F02M

Abstract:
A fuel injection valve comprising:a nozzle provided with an injection bore and having a needle axially movable for opening and closing the injection bore; a pressure control chamber to which high pressure fuel is supplied, fuel pressure in the pressure control chamber being operative to urge the needle in a direction of closing the injection bore; a fuel flow-out passage provided at an outlet thereof with an orifice, the high pressure fuel of the pressure control chamber being introduced into the fuel flow-out passage and ejected via the orifice; and a control valve arranged so as to be seated on the outlet of the fuel flow-out passage and operative to open and close the fuel flow-out passage, wherein the fuel flow-out passage is further provided with a guide member which, when the outlet thereof is opened by the control valve, guides a flow of the fuel introduced from the pressure control chamber thereto in such. a manner that one of two flow states consisting of a turbulent flow state and a laminar flow state is exclusively formed at first and, then, maintained, always as far as fuel temperature is within a range from âˆ’30 to 80Â° C. and fuel pressure is within 10 to 50 M Pa.