Abstract: A fuel injection valve for internal combustion engines, having a valve body (1) in which a bore (3) is embodied that is defined on its end toward the combustion chamber by a valve seat (18) at which at least one injection opening (20) originates. The hollow valve needle (8) is located longitudinally displaceably in the bore (3) and has a valve sealing face (35) on its end oriented toward the valve seat (18). A first sealing region (31; 34) and a second sealing region (32; 46; 48) are embodied on the valve sealing face (35), and upon contact of the hollow valve needle (8) with the valve seat (18), the first sealing region (31; 34) upstream of the at least one injection opening (20) and the second sealing region (32; 46; 48) downstream of that injection opening effect sealing between the valve sealing face (35) and the valve seat (18) (FIG. 1).

Abstract: A fuel injection valve for internal combustion engines having a valve seat at which at least one injection opening originates. A valve needle with a valve sealing face embodied thereon cooperates with the valve seat to close and open the at least one injection opening. First and second sealing edges are embodied on the valve sealing face; in the closing position of the valve needle the first sealing edge rests sealingly on the valve seat upstream of the at least one injection opening and the second sealing edge rests sealingly on the valve seat downstream of the at least one injection opening. On its face end toward the valve seat the valve needle has a recess such that a sealing lip is formed which can be deformed elastically or plastically inward by the contact of the valve needle on the valve seat and at which the second sealing edge is embodied.

Abstract: A fuel injection valve, having a valve body that contains a bore whose combustion chamber end is delimited by a valve seat from which at least two injection openings lead. The bore contains outer and inner concentric valve needles whose ends oriented toward the combustion chamber each open and close the injection openings. A pressure chamber between the outer valve needle and the valve body bore can be filled with fuel. The inner valve needle is guided in a longitudinal bore of the outer needle by first and second sections between which an annular chamber is formed, which is delimited by the inner valve needle and the wall of the longitudinal bore. A throttle connection is capable of connecting the annular chamber to the pressure chamber and the diameter of the first guide section is greater than the diameter of the second guide section.

Abstract: A fuel injection valve for internal combustion engines, having a valve body (1) in which a bore (3) is embodied that is defined on its end toward the combustion chamber by a valve seat (18) at which at least one injection opening (20) originates. The hollow valve needle (8) is located longitudinally displaceably in the bore (3) and has a valve sealing face (35) on its end oriented toward the valve seat (18). A first sealing region (31; 34) and a second sealing region (32; 46; 48) are embodied on the valve sealing face (35), and upon contact of the hollow valve needle (8) with the valve seat (18), the first sealing region (31; 34) upstream of the at least one injection opening (20) and the second sealing region (32; 46; 48) downstream of that injection opening effect sealing between the valve sealing face (35) and the valve seat (18) (FIG. 1).

Abstract: An apparatus for cleaning hydraulic fluid includes a centrifugal fluid-spinning disk arranged in a housing, of which an upper portion forms a vapor chamber and a lower portion forms a fluid collecting basin. A vacuum pump is connected to the housing through an oil mist separator, such that water vapor is vacuumed away and hydraulic fluid collects in the oil mist separator to then be pumped away. The apparatus further includes preferably a single container that contains both the contaminated hydraulic fluid that is to be cleaned and the cleaned hydraulic fluid. A flexible inlet line and a flexible outlet line with respective hydraulic quick connectors are provided to connect the apparatus and particularly the oil container to a hydraulic system of an aircraft, for example. A high pressure pump connected to the outlet line pumps the cleaned hydraulic fluid into the aircraft hydraulic system and a pressure maintaining valve in the inlet line maintains the system pressure.