Abstract:
The invention relates to a fuel injection valve for fuel injection systems of internal combustion engines. The fuel injection valve comprises an electromagnetic actuating element with a solenoid (1), an inner pole (2) and with an outer magnetic circuit component (5), and comprises a moving valve closing body (19), which interacts with a valve seat (16) assigned to a valve seat body (15). The valve seat body (15) and the inner pole (2) are placed inside an inner opening (11) of a thin-walled valve sleeve (6), and the solenoid (1) and the outer magnetic circuit component (5) are placed on the outer periphery of the valve sleeve (6). The valve sleeve (6) comprises an outside section (12) and comprises a bottom section (13) at the downstream end of the valve sleeve. This bottom section extends in a manner that is largely perpendicular to the otherwise axial extension of the valve sleeve (6) at an axial distance to a spraying perforated disk (21). A cavity (60) is formed between the fuel spraying perforated disk (21) and the bottom section (13) of the valve sleeve (6). This cavity exerts a capillary action in a radial outward direction onto the fuel exiting from the at least discharge opening (27).
Abstract:
A fuel injector is described that includes a polymeric housing, a metering assembly, and a closure assembly. The polymeric housing includes a continuous polymeric bore that extends from a first external seal proximate an inlet to a second external seal proximate an outlet of the bore along a longitudinal axis. The metering assembly is disposed proximate the second external seal. The closure assembly is disposed proximate the metering assembly, and a portion of the closure assembly is contiguous to the polymeric bore and disposed between the first and second external seals. A method of maintaining leak integrity is described
Abstract:
A modular fuel injector that includes a coil group subassembly (300) and a valve group subassembly (200). The coil group subassembly is independently testable. The valve group subassembly is independently testable and includes a tube assembly having a longitudinal axis extending between a first tube end and the second tube end. The seat assembly (218) includes a flow portion (219) and a securement portion (219B). The flow portion extends along the longitudinal axis between a first surface and an orifice disk retention (218C) surface at a first length. The flow portion has a seat orifice extending therethrough and an orifice disk (222) coupled to the orifice disk retention surface (218C) so that the orifice plate is aligned in a fixed spatial orientation with respect to the flow portion. The securement portion extends along the longitudinal axis away from the orifice disk retention surface at a second length greater than the first length. A method of maintaining a fixed spatial orientation and dimensional symmetry of at least one of the seat and orifice disk in the valve subassembly is disclosed.
Abstract:
Eine Brennstoffeinspritzanlage (1) zum Einspritzen von Brennstoff in eine Brennkraftmaschine umfasst zumindest ein Brennstoffeinspritzventil (2) und eine ersten Brennstoff verteilerleitung (3), die mit jedem der Brennstoffeinspritz ventile (2) verbunden ist. Eine zweite Brennstoffverteilerleitung (4) ist vorgesehen, welche über jeweils eine Lanze (5) mit jedem der Brennstoffeinspritzventile (2) in Verbindung steht.
Abstract:
Die Erfindung betrifft ein Brennstoffeinspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen. Das Brennstoffeinspritzventil umfasst ein elektromagnetisches Betätigungselement mit einer Magnetspule (1), mit einem Innenpol (2) und mit einem äußeren Magnetkreisbauteil (5) und einen bewegbaren Ventilschließkörper (19), der mit einem einem Ventilsitzkörper (15) zugeordneten Ventilsitz (16) zusammenwirkt. Der Ventilsitzkörper (15) und der Innenpol (2) werden in einer inneren Öffnung (11) einer dünnwandigen Ventilhülse (6) sowie die Magnetspule (1) und das äußere Magnetkreisbauteil (5) am äußeren Umfang der Ventilhülse (6) angeordnet. Die Ventilhülse (6) weist einen Mantelabschnitt (12) und an ihrem stromabwärtigen Ende einen Bodenabschnitt (13) auf, der weitgehend senkrecht zu der ansonsten axialen Erstreckung der Ventilhülse (6) mit einem axialen Abstand zu einer wenigstens eine Abspritzöffnung (27) aufweisenden Spritzlochscheibe (21) verläuft. Zwischen der Spritzlochscheibe (21) und dem Bodenabschnitt (13) der Ventilhülse (6) ist eine Ausnehmung (60) gebildet, die auf den aus der wenigstens einen Abspritzöffnung (27) austretenden Brennstoff eine Kapillarwirkung in radialer Richtung nach außen ausübt.
Abstract:
An assembly for a fuel injector having a metallic armature (172) and a metallic poppet (202) attached to the armature (172) at an interface location. The armature and/or the poppet includes a coating at the interface location, where the coating has a higher resistance to corrosion as compared to the base material of the poppet and/or the base material of the armature.
Abstract:
Ein Brennstoffeinspritzventil (1) weist eine Magnetspule (10) auf, die mit einem von einer Rückstellfeder (23) beaufschlagten Anker (20) zusammenwirkt, der zusammen mit einer Ventilnadel (3) ein axial bewegliches Ventilteil bildet. An der Ventilnadel (3) ist ein Ventilschliesskörper (4) vorgesehen, der mit einem Ventilsitzkörper (5) einen Dichtsitz bildet. Ein Flansch (14), der den Anker (20) durch eine Ausnehmung (19) des Ankers (20) durchgreift, und mit der Ventilnadel (3) kraftschlüssig verbunden ist, weist zumindest einen radialen Brennstoffkanal (11) auf, mittels dem bei Betätigung des Brennstoffeinspritzventils (1) ein Innenraum (29) des Brennstoffeinspritzventils (1) mit einer Ausnehmung (22) der Ventilnadel (3) verbindbar ist.
Abstract:
An air assist fuel injector having an armature (132) and a solenoid for actuating the armature. The armature (132) includes a conduit (150) having a conical portion for delivering liquid fuel and gas to a poppet (134) of the air assist fuel injector. The conduit (150) includes an inlet for receiving the liquid fuel and gas from a cap (102) of the air assist fuel injector. The cap (102) includes a number of channels (104, 106) for delivering the liquid fuel and gas, and the outlets of the channels are located radially inward of the periphery of the inlet to the armature conduit (150). The armature also includes a flow path located between an area upstream of the inlet to the armature and an area downstream of the armature. The flow path may include one or more recesses in the armature or one or more recesses in an armature guide of the air assist fuel injector.
Abstract:
In an electromagnetic type fuel injection valve for internal combustion engines, a valve-driving electromagnetic coil bobbin (15) is made of a synthetic resin containing a filler having good thermal conductivity. The electromagnetic coil includes two kinds of coils (12, 13), different in characteristics from each other, that are axially-separately wound on one bobbin (15). One coil (12) is wound on the bobbin (15) such that it is closer to a movable element (19) than the other coil (13), and the outer diameter of the bobbin in the region where the other coil (13) is wound is smaller than the outer diameter of the bobbin in the region where one coil (12) is wound. Further, the inner diameter of the bobbin in the region where one coil (12) is wound has a level difference to form an annular space in which a seal ring (18) is disposed. The two kinds of coils (12, 13) are connected to a power supply and a switching element through a three-terminal connector.
Abstract:
A fuel delivery injector for a spark-ignition internal combustion engine. The delivery injector forms part of a device (10) which provides a combined fuel injection and ignition means for the engine. The fuel delivery injector comprises means defining a flow path (28) for delivery of a fuel entrained in a gas to a combustion chamber of the engine. The flow path (28) has a delivery port (30) through which the fuel is delivered into the combustion chamber as a spray of fuel droplets and vapour, the delivery port (30) being defined between a valve seat (31) and a valve member (23) movable with respect to the valve seat (31) for opening and closing the delivery port (30). The delivery injector is configured to influence the trajectory of the fuel spray, whereby smaller fuel droplets and vapour in the fuel spray are caused to flow towards a spark gap (49) in close proximity to the downstream end of the delivery port (30) and whereby larger fuel droplets are not so caused to flow towards the spark gap (49). The trajectory of the fuel spray may be so influenced by the presence of a flow control means or the configuration of the delivery port. Where a flow control means is utilized, it may comprise a flow control projection (41) which is provided on the valve member (23) and which extends outwardly therefrom beyond the delivery port (30). Where the device (10) provides a combined fuel injector and ignition means, the device (10) is provided with a primary electrode (48) which cooperates with a secondary electrode (47) to define the spark gap (49). The flow control projection (41) is utilized to define the primary electrode (48). The device (10) providing the combined fuel injection and ignition means is also described and claimed.