FUEL INJECTION VALVE

摘要

A fuel injection valve includes a nozzle needle that opens or closes an injection hole communicating with an internal combustion engine, and a high-pressure fuel is introduced into a control room to urge the nozzle needle to close the injection hole. An orifice body includes a discharge passage through which the fuel is discharged from the control room to a low pressure portion, and an orifice-body sheet surface that is flat and surrounds a downstream end part of the discharge passage. A valve body contacts with or separates from the orifice-body sheet surface to close or open the discharge passage. A chamfered part is provided on a corner part in which the orifice-body sheet surface intersects with the discharge passage.

主权项

1. A fuel injection valve comprising:
a nozzle needle that opens or closes an injection hole through which a fuel is injected into an internal combustion engine; a control room into which a high-pressure fuel is introduced to urge the nozzle needle in a valve closing direction; an orifice body including a discharge passage through which the fuel is discharged from the control room to a low pressure portion, and an orifice-body sheet surface that is flat and surrounds a downstream end part of the discharge passage; a valve body that contacts with or separates from the orifice-body sheet surface to close or open the discharge passage; and a chamfered part provided on a corner part in which the orifice-body sheet surface intersects with the discharge passage.