High-pressure-proof injector with spherical valve element
AssigneeRobert Bosch GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
The invention relates to an injector for injecting fuel into the combustion chambers of an internal combustion engine. The inlet originating at a high-pressure collection chamber (common rail) discharges into the housing of the injector, in which a control part is received, movable vertically. The motion of the control part is effected via the pressure relief of a control chamber, provided in the housing of the injector, by means of an actuator-actuatable closing element. Upon triggering of the control part via the actuator-actuatable closing element, a seat valve embodied as a spherical control body closes or opens inlets and outlets.
Claims13
In an injector for injecting fuel into combustion chambers of an internal combustion engine, in which an inlet (13) from a high-pressure collection chamber (common rail) discharges into the housing (2) of the injector (1), and a control part (3) is received, vertically movably, in the housing (2) of the injector (1), the motion of the control part (3) being effected via a pressure relief of a control chamber (9) provided in the housing (2), to which chamber an actuator-actuatable closing element (4) is assigned, the improvement wherein the injector includes a nozzle chamber (35) and a leaking oil line (30), and upon triggering of the control part (3) via the actuator-actuatable closing element (4), a spherical control body (19), opens or closes an inlet (25) to the nozzle chamber (35) while an outlet (26) to the leaking oil line (30) is closed or opened.
In an injector for injecting fuel into combustion chambers of an internal combustion engine, in which an inlet (13) from a high-pressure collection chamber (common rail) discharges into the housing (2) of the injector (1), and a control part (3) is received, vertically movably, in the housing (2) of the injector (1), the motion of the control part (3) being effected via a pressure relief of a control chamber (9) provided in the housing (2), to which chamber an actuator-actuatable closing element (4) is assigned, the improvement wherein the injector includes a nozzle chamber (35) and a leaking oil line (30), and upon triggering of the control part (3) via the actuator-actuatable closing element (4), a spherical control body (19)opens or closes an inlet (25) to the nozzle chamber (35) while an outlet (26) to the leaking oil line (30) is closed or opened, said control body (19) being acted upon via a pressure bolt (32) embodied on a stepped control part (3), and said stepped control part (3) being embodied in multiple parts, and between the head region and the pressure bolt (32), there is a spring element (17).
In an injector for injecting fuel into combustion chambers of an internal combustion engine, in which an inlet (13) from a high-pressure collection chamber (common rail) discharges into the housing (2) of the injector (1), and a control part (3) is received, vertically movably, in the housing (2) of the injector (1), the motion of the control part (3) being effected via a pressure relief of a control chamber (9) provided in the housing (2), to which chamber an actuator-actuatable closing element (4) is assigned, the improvement wherein the injector includes a nozzle chamber (35) and a leaking oil line (30), and upon triggering of the control part (3) via the actuator-actuatable closing element (4), a spherical control body (19)-opens or closes an inlet (25) to the nozzle chamber (35) while an outlet (26) to the leaking oil line (30) is closed or opened, said control body (19) being acted upon via a pressure bolt (32) embodied on a stepped control part (3), and said pressure bolt (32) comprises one edge embodied as a leaking oil slide edge (34) which in a leaking oil chamber (26) disconnects the leaking oil line (30) and the nozzle inlet (25) from one another or connects them to one another.
Dependencies are inferred from the claim text.