Common rail injector
AssigneeRobert Bosch GmbH
InventorsSiegfried Ruthardt, Juergen Hanneke, Holger Rapp
Life of this patent
Estimating the term…
Abstract
The invention relates to a common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, having an injector housing, which communicates with a central high-pressure reservoir and in which a nozzle needle is axially displaceable in order to adjust the injection as a function of the pressure in a control chamber, and having a sealing element, which is disposed in an annular chamber that is provided between a valve element and the injector housing. In addition to the sealing element, a support device is disposed in the annular chamber between the valve element and the injector housing.
Claims15
A common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, comprising an injector housing (1), which communicates with a central high-pressure reservoir and in which a nozzle needle is axially displaceable in order to adjust the injection as a function of the pressure in a control chamber, and an annular sealing ring (6), which is disposed in an annular chamber (3) that is provided between a valve element (2) and the injector housing (1), and in addition to the sealing ring (6), a continuous annular support disc (7) is disposed in the annular chamber (3) between the valve element (2) and the injector housing (1), the support disc (7) engaging and supporting the sealing ring and engaging the valve element around its inner circumference.
A common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, comprising an injector housing (1), which communicates with a central high-pressure reservoir and in which a nozzle needle is axially displaceable in order to adjust the injection as a function of the pressure in a control chamber, and a sealing element (6), which is disposed in an annular chamber (3) that is provided between a valve element (2) and the injector housing (1), an annular support device (7) disposed in the annular chamber (3) between the valve element (2) and the injector housing (1) and engaging the sealing element, and leakage grooves (8, 9, 10, 11) embodied in the annular support device.
Dependencies are inferred from the claim text.