Throttle element with gap filter
AssigneeRobert Bosch GmbH
InventorEberhard Maier
Life of this patent
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Abstract
A throttle element with a gap filter for use in a fuel pump is proposed, which is press-fitted into a conduit in the housing of an injection pump. By means of the press fitting, a good sealing action and at the same time low-cost production and mounting are attained. The throttle element can furthermore be designed economically and compactly.
Claims15
In a throttle element for incorporation into a fuel-carrying conduit (5), having a throttle (15) by which a fluid flow flowing through the throttle element (1) can be limited, the throttle element (1) being embodied as an insert and having a sealing portion (3) that cooperates with the conduit (5), and a passage in fluid communication with the throttle (15) is provided within the sealing portion (3), and a filter collar (9) that with the conduit (5) forms an annular gap (11) is present on the throttle element (1), the improvement wherein said throttle element (1) is press-fitted into the conduit (5), wherein said sealing portion (3) is embodied as a truncated cone, which cooperates with a corresponding sealing seat in the conduit (5).
In a throttle element for incorporation into a fuel-carrying conduit (5), having a throttle (15) by which a fluid flow flowing through the throttle element (1) can be limited, the throttle element (1) being embodied as an insert and having a sealing portion (3) that cooperates with the conduit (5), and a passage in fluid communication with the throttle (15) is provided within the sealing portion (3), and a filter collar (9) that with the conduit (5) forms an annular gap (11) is present on the throttle element (1), the improvement wherein said throttle element (1) is press-fitted into the conduit (5), wherein said throttle element (1) has a centering collar (19) with a fluid passage (21).
In a throttle element for incorporation into a fuel-carrying conduit (5), having a throttle (15) by which a fluid flow flowing through the throttle element (1) can be limited, the throttle element (1) being embodied as an insert and having a sealing portion (3) that cooperates with the conduit (5), and a passage in fluid communication with the throttle (15) is provided within the sealing portion (3), and a filter collar (9) that with the conduit (5) forms an annular gap (11) is present on the throttle element (1), the improvement wherein said throttle element (1) is press-fitted into the conduit (5), wherein said throttle element (1) has a sleeve (26), and that the sleeve (26) is upset in the pressing process.
An injection pump, having a low-pressure region and a high-pressure region, having a conduit (5) for removing leaking oil from the low-pressure region, and having a throttle element with a gap filter in the conduit (5), said throttle element (1) having a throttle (15) by which a fluid flow flowing through the throttle element (1) can be limited, the throttle element (1) being embodied as an insert and having a sealing portion (3) that cooperates with the conduit (5), and a passage in fluid communication with the throttle (15) is provided within the sealing portion (3), and a filter collar (9) that with the conduit (5) forms an annular gap (11) is present on the throttle element (1), the improvement wherein said throttle element (1) is press-fitted into the conduit (5).
Dependencies are inferred from the claim text.