摘要:
A fuel inlet (36) opens at one end between the valve seat (14) and the inner surface of the valve housing (12) on which the globe valve (10) slides. The other end of the fuel inlet (36) opens to the external surface of the valve housing (12). The fuel inlet (36) runs almost in the direction of the central axis of the globe valve (10) so as to prevent the formation of vortex flow around the globe valve (10). Inside the valve housing (12) immedi. ately downstream of the valve seat (14) is fitted under pressure a spiral member (40) which is a rod with a spiral fuel groove (38) to swirl the fuel along the groove. Ano αtlet orifice (42) for fuel metering is formed immediately downstream of and as close as possible to the spiral member (40). In an other embodiment of the invention the valve housting (12) is surrounded by a housing (43) with fuel inlets (36'). This housing (43) is fightly connected to the downstream-end of the valve housing (12) having tangential bores (44) for assisting air-inlet joining with a conical space (45) and blowing the assisting air towards the axis of the outlet orifice (42).
摘要:
Es wird ein elektromagnetisch betätigbares Ventil vorgeschlagen, das insbesondere zur Kraftstoffeinspritzung in das Saugrohr von mit Kraftstoffeinspritzanlagen arbeitenden Brennkraftmaschinen dient. Das Kraftstoffeinspritzventil umfaßt ein Ventilgehaüse (1), einen Schalenkern (7) mit einer Magnetspule (18) und einen Flachanker (29), der mit einem kugelförmig ausgebildeten Ventilteil (30) fest verbunden ist, das eine zentrale Führungsöffnung (31) einer Führungsmembran (11) durchragt und mit einem festen Ventilsitz (32) zusammenwirkt. Die Führungsmembran (11) führt das Ventilteil (30) in radialer Richtung zum Ventilsitz (32). Der Flachanker (29) berührt unter Federspannung mit einer konzentrischen Führungskante (35) die Führungsmembran (11) und wird so planparallel zur Stirnfläche (28) des Schalenkerns (7) geführt. Die Kraftstoffzufuhr zum Ventil erfolgt durch radiale Zuströmöffnungen (68) in der Ventilwand. Der nicht zugemessene Kraftstoff kann nach Durchströmen des Magnetteiles über axial gegenüber den Zuflußöffnungen (68) versetzte und abgedichtete radiale Abflußöffnungen (70) in eine Kraftstoffrückströmleitung (67) gelangen.
摘要:
An electromagnetic fuel injector having an energizable stator means (10) for controlling the movement of a valve member of a valve assembly (10) to open and close the injector and thereby meter fuel, said valve assembly comprising a valve housing (30, 32) including a valve housing bore (92) terminating with a valve seat (56) which is connected to an exit orifice, a valve assembly (60) including a valve (60) reciprocally located in said valve housing bore, operable to close said exit orifice by sealing said valve seat (56) with a ball valve (60), a swirl chamber (43) for imparting to the fuel flow exhausted from the exit orifice a swirl component that is tangential with respect to the spray axis of the injector, and means (40) for supplying fuel from a pressurized source to said swirl chamber, characterized in that said fuel supply means includes means (70) forming a hollow cylinder (42) of fuel between said source and said swirl chamber, and at least one orifice (52) communicating fuel between said fuel cylinder forming means (70) and said swirl chamber (43).
摘要:
A valve assembly (3) for an injection valve (1) comprises - a valve body (4) with a central longitudinal axis (L) comprising a cavity (9) with a fluid inlet portion (5) and a fluid outlet portion (7), - a sealing ball (15) axially moveable in the cavity (9), the sealing ball (15) interacting with a valve seat (17) at the fluid outlet portion (7) to prevent a fluid flow through the fluid outlet portion (7) in a closing position and to release the fluid flow through the fluid outlet portion (7) in further positions, wherein the sealing ball (15) serves as an armature for an electro-magnetic actuator unit (18) of the injection valve (1).
摘要:
The invention relates to a fuel injection valve, especially a high pressure injection valve, for directly injecting fuel into a combustion chamber of a mixture-compressing, spark-injection internal combustion engine. Said fuel injection valve is characterised in that a valve seat element (26) is provided on the downstream end of the valve, a perforated disc (70) used as a flow limiting device being connected downstream from the same. A torsion element (47) is situated upstream of the valve seat (27), the fuel to be injected being displaced in a spray-stimulating rotational movement by means of said torsion element. A longish outlet (32) is embodied downstream from the valve seat (27), in the valve seat element (26), said outlet opening up directly into an opening (73) of the perforated disc (70) fixed to the valve seat element (26). The width of the outlet (32) is larger than the width of the opening (73), at least on the narrowest side thereof, in such a way that the static flow quantity of the valve can be adjusted at the opening (73).
摘要:
The invention concerns a safety valve, designed to equip a system for measured fluid dispensing powered with pressurised fuel by a supply conduit and provided with a projecting rod (4) which forms a discharge valve with a first seat (7). The valve comprises at least two separate parts (9, 10), a first part forming a second seat (9), said second seat (9) being formed at the end of the fuel supply conduit and capable of co-operating with a second part, called mobile part (10), which constitutes closure means, said closure means (10) being mobile under the action of translating means (5) so as to be urged to co-operate with the second seat (9), and seal the supply conduit.
摘要:
In a fuel injection valve body for a direct injection type internal combustion engine, an entire nozzle body tip portion (3a) is formed in a conical shape protruding from a nozzle body outer peripheral surface (3b) covered with a cap (24). Therefore, neither a corner portion nor a recessed portion is formed on a surface of the nozzle body tip portion (3a). This prevents heat generated by combustion from concentrating at a corner portion or a surface area or from enlarging by a recessed portion, which in turn prevents heat generated by combustion from increasing the temperature of the nozzle body tip portion (3a). Moreover, since a foremost portion (3c) of a spherical shape is formed such that it does not form a corner portion or a recessed portion in a peripheral portion of a conical shape, heat generated by combustion does not increase the temperature of the nozzle body tip portion (3a). The temperature of a nozzle hole can therefore be prevented from increasing and accumulation of deposits can be restricted.