Abstract:
Ein Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen umfaßt eine Magnetspule (2) und einen durch die Magnetspule (2) erregbaren Anker (7), der mit einem Ventilschließkörper (11) in Wirkverbindung steht, welcher mit einem in einer Ventilhülse (5) angeordneten Ventilsitzkörper (12) einen Dichtsitz bildet. Der Ventilsitzkörper (12) ist mittels einer Klemmhülse (23) in der Ventilhülse (5) fixiert.
Abstract:
A modular fuel injector for an internal combustion engine, including a valve group subassembly and a power group subassembly. The valve group subassembly includes a first stator member (38) defining a fluid passage (41), a second stator member (82), a non-magnetic shell (80) disposed between the first and second stator members, a valve body (12), and an armature member (20). The armature member (20) defines a first working air gap (15) with the first stator member (38) and a second working air gap (86) with the second stator member (82). The armature member includes a closure member (16) proximate an outlet end and contiguous to a seat (22) in a first configuration. The power group subassembly includes an electromagnetic coil (43) surrounding the fluid passage (41), a housing (60) encasing the coil, and an ovemold (45) encapsulating the coil and the housing.
Abstract:
Ein Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen umfaßt einen erregbaren Aktuator (10), eine mit dem Aktuator (10) in Wirkverbindung stehende und in einer Schließrichtung von einer Rückstellfeder (23) beaufschlagte Ventilnadel (3) zur Betätigung eines Ventilschließkörpers (4), der zusammen mit einer an einem Ventilsitzkörper (5) ausgebildeten Ventilsitzfläche (6) einen Dichtsitz bildet, und zumindest eine Abspritzöffnung (7), die in dem Ventilsitzkörper (5) ausgebildet ist. Ein Führungsbereich (37), der in dem Ventilsitzkörper (5) ausgebildet ist und in welchem der Ventilschließkörper (4) geführt ist, ist in einer Strömungsrichtung des Brennstoffs konisch verjüngt ausgebildet.
Abstract:
Ein Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen umfasst einen Aktor, eine von dem Aktor betätigbare Ventilnadel (3) zur Betätigung eines Ventilschliesskörpers (4), der zusammen mit einer an einem Ventilsitzkörper (5) ausgebildeten Ventilsitzfläche (6) einen Dichtsitz bildet, und zumindest einer Abspritzöffnung (7), die in dem Ventilsitzkörper (5) ausgebildet ist. An einem abströmseitigen Ende (42) des Brennstoffeinspritzventils (1) ist ein Flammschutzsieb (37) angeordnet, welches die Abspritzöffnungen (7) gegen den Brennraum der Brennkraftmaschine abschirmt.
Abstract:
A fuel injection valve (1), especially for direct injection of fuel into a combustion chamber of a mixture-compression, spark ignition internal combustion engine, comprises an actuator (10) and a valve needle (3) which is actuated by said actuator (10) and which activates a valve closing body (4). Said valve-closing body forms a sealed seat, together with a valve seat surface (6) which is configured on a valve seat body (5). The inventive valve also comprises several injection openings (7) which are configured in the valve seat body (5), and a damping element (37) is located in a recess (36) of the valve-closing body (4) on the off-flow side.
Abstract:
The invention relates to a fuel injection valve, in particular, a fuel injection valve extending directly into a combustion chamber of an internal combustion engine, with an energisable actuator (10, 11, 12), a valve closing body (7), displaced by said actuator (10, 11, 12), a fixed valve seat (22) with which the valve closing body (7) co-operates to open and close the valve, a fuel outlet formed, in a downstream spray region, from at least one outlet opening (23), arranged downstream of the valve seat (22) and with a dead volume (25), formed upstream of the spray region with at least one outlet opening (23). The dead volume defining surface (33) of the valve closing body (7) comprises a surface structure with at least some pores for the storage of combustion chamber gas having a pore depth of at least 25 mu m.
Abstract:
The invention relates to a fuel injection valve (1), especially for direct injection of fuel into the combustion chamber of a mixture-compressing, externally ignited internal combustion engine, comprising the following elements located upstream from a valve seat surface (6): a turbulence disk (35) with turbulence channels (36) from which the fuel flows into a turbulence chamber (37), also disposed upstream from the valve seat surface (6), at a peripheral velocity when the fuel injection valve is open. Each crossflown point in any direction of the chamber downstream from the turbulence disk is larger than the diameter of the turbulence channels (36).
Abstract:
The invention relates to a method for producing a valve seat body (5) of a fuel injection valve (1) comprising swirl channels (36) that are provided inside a recess (35) for generating swirl. To this end, a valve seating (6) of the valve seat body (5) interacts with a valve closing body (4) of the fuel injection valve (1) in order to form a tight seat, and the recess (35) serves as a guide of the valve closing body (4). The inventive method comprises the following steps: manufacturing a blank of the valve seat body (5); providing the recess (35), the valve seating (6) and at least one spray opening (7) inside the blank of the valve seat body (5) and providing the swirl channels (36) inside the recess (35). A non-cutting processing step is used to provide the swirl channels (36) inside the recess (35).
Abstract:
The invention relates to a fuel injection valve, in particular, a fuel injection valve extending directly into a combustion chamber of an internal combustion engine, with an energisable actuator (10, 11, 12), a valve closing body (7), displaced by said actuator (10, 11, 12), a fixed valve seat (22) with which the valve closing body (7) co-operates to open and close the valve, a fuel outlet formed, in a downstream spray region, from at least one outlet opening (23), arranged downstream of the valve seat (22) and with a dead volume (25), formed upstream of the spray region with at least one outlet opening (23). The dead volume defining surface (33) of the valve closing body (7) comprises a surface structure with at least some pores for the storage of combustion chamber gas having a pore depth of at least 25 mu m.
Abstract:
A fuel injector (1) for a large two-stroke internal combustion engine has an elongated outer housing (2) for mounting in a water-cooled cylinder cover (51). A primary valve seat (18) for opening and closing the fuel injector is positioned in an upper, cooled valve section (1a), while a secondary closing member (32) for the fuel flow to the nozzle holes (24) is positioned in the nozzle (4) in an uncooled valve section (1b). The nozzle bore comprises an upper bore section (22) with a larger diameter than a lower bore section (29) with the nozzle holes. The secondary closing member is positioned at an area (23) with tapering diameter, when the valve slide (15) is in its closed position. On one side the closing member cuts off the majority of the fuel volume in the nozzle bore from the nozzle holes when the valve is closed, and on the other side, the valve slide ends at a distance from the nozzle holes so that the lower section (30) of the slide does not disturb the atomization when the injector is open.