Delivery pump
AssigneeMannesmann VDO AG
InventorPeter Marx
Life of this patent
Estimating the term…
Abstract
A feed pump (2) designed for feeding fuel in a motor vehicle, with an impeller (7) having vane chambers (10, 10a, 11, 11a) delimited by guide vanes (12, 13), and in casing parts (3, 4) adjacent to the impeller (7) and having part-annular channels (14, 15) arranged in the region of the vane chambers (10, 10a, 11, 11a), has a degassing duct (19), the start of which is arranged downstream of an inlet port (8). Some of the vane chambers (10) are connected to the degassing duct (19) via pockets (20) worked into the impeller (7). By means of this degassing duct (19), gas bubbles present in the fuel are discharged reliably from the feed pump (2).
Claims9
A feed pump with a driven impeller which rotates in a pump casing and in which a ring of guide vanes delimiting vane chambers is arranged in at least one of its end faces, and with a part-annular channel which is arranged in the pump casing in the region of the guide vanes and forms with the vane chambers a feed chamber for feeding a liquid from an inlet port to an outlet port and which has a degassing duct arranged in a radially inner region of the pump casing, as seen from the part-annular channel, and having a degassing bore leading out of the feed pump, wherein only some of the vane chambers (10, 21) have a connection to the degassing duct (19).
Dependencies are inferred from the claim text.