DEVICE FOR RESTRICTING THE THROUGHFLOW QUANTITY AT A PUMP, AND PUMP ARRANGEMENT HAVING A DEVICE OF THIS TYPE

A device (2) for restricting the throughflow quantity at a pump (3), in particular at a suction-throttled delivery pump for fuel injection systems of air-compressing, self-igniting internal combustion engines, has a feed channel (4) on the suction side of the pump (3), which feed channel (4) is conn...

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Bibliographische Detailangaben
1. Verfasser: LANGENBACH, Christian
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A device (2) for restricting the throughflow quantity at a pump (3), in particular at a suction-throttled delivery pump for fuel injection systems of air-compressing, self-igniting internal combustion engines, has a feed channel (4) on the suction side of the pump (3), which feed channel (4) is connected on an outlet side (8) to an inlet (9) of a pump (3), a cut-off channel (6) which can be connected on its inlet side (10) at least indirectly to an outlet (12) of the pump (3) and which opens on its outlet side (13) laterally at an opening point (14) into the feed channel (4), and a pressure control valve (7) which is arranged in the cut-off channel (6). Furthermore, a throttle (5) is provided which is arranged in the feed channel (4) between the opening point (14) and the outlet side (8) of the feed channel (4). A transverse flow is caused at the opening point (14) by a cut-off quantity which is discharged via the cut-off channel (6), which transverse flow is superimposed with a main flow through the feed channel (4). As a result, a lateral incident flow of the throttle (5) can be achieved, as a result of which the effective throttle diameter is reduced. A given pressure difference at the pump (3) can therefore be reduced. Furthermore, Furthermore, a pump arrangement (1) with the pump (3) and the device (2) for restricting the throughflow quantity is disclosed.