Pressure-controlled injector for injecting fuel
AssigneeRobert Bosch GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
An injector for injecting fuel into the combustion chambers of an internal combustion engine in which a movable control part is contained in the housing of the injector and is guided in this injector housing to unblock the inlet to an injection nozzle when a closing element relieves the pressure in a control chamber or closes the inlet when a pressure is built up in the control chamber. The nozzle needle of the injector is associated with a piston element which encourages the closing movement of the nozzle needle and counteracts its opening movement.
Claims12
An injector for injecting fuel into the combustion chambers of an internal combustion engine, comprising an injector housing (2) containing a movable control part (3) having a slide valve (16), which is supported in the housing (2) and unblocks an inlet (13) to an injection nozzle (27) when the pressure of a control chamber (9) is relieved by means of a control element (4) or closes said inlet (13) when there is pressure built-up in the control chamber (9), wherein a nozzle needle (26) is associated with a piston element (18), having an upper end face (21), which encourages its closing movement and resists its opening movement, said upper end face (21) being arranged within a leakage oil chamber (17), being connectable, via said slide valve (16) with an inlet (12) and a bore (30) from nozzle chamber (28).
Dependencies are inferred from the claim text.