Patent ID: 8662411
Filing Date: 2014-03-04
Classification: F02M

Abstract:
1. A fuel injection valve for internal combustion engines, for injecting fuel at high pressure, comprising: a nozzle needle which by a longitudinal motion thereof cooperates with a valve seat and thereby opens and closes at least one injection opening, and the nozzle needle, as a result of pressure in a control chamber, experiences a closing force oriented in a direction of the valve seat; and a control valve, embodied in a valve body, by which control valve the pressure in the control chamber is adjustable, and the control valve includes a control valve chamber communicating with the control chamber, in which control valve chamber a control valve member is disposed longitudinally movably and by a longitudinal motion thereof opens and closes a communication of the control valve chamber with a leak fuel chamber, wherein the control valve member is surrounded by pressure in the control valve chamber and is embodied such that by the pressure in the control valve member, no or only a very slight resultant hydraulic force is exerted on the control valve member in a longitudinal direction of motion when the control valve member closes the communication of the control valve chamber with the leak fuel chamber.