Supply unit
AssigneeRobert Bosch GmbH
InventorsPeter Schelhas, Dietmar Schmieder, Willi Strohl, Albert Gerhard
Life of this patent
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AssigneeRobert Bosch GmbH
InventorsPeter Schelhas, Dietmar Schmieder, Willi Strohl, Albert Gerhard
Estimating the term…
In a feed unit for delivering fuel from a supply tank (10) with a filter cup (13) having a central chamber (14) and an annular chamber (15) enclosing the latter, with a filter cover (30) which closes the annular chamber (15) and which contains an inlet duct (36) to the annular chamber (15) and an outlet duct (37) from the annular chamber (15), and with a feed pump (22) which is inserted in the central chamber (14) and which projects with a suction connection piece (26) through an opening (20) into a suction space (19), assembly is simplified and manufacturing costs are reduced in that the clearance diameter of the central chamber (14) is dimensioned so as to be greater than the outer diameter of the pump housing (23), and an axially projecting pressure connection piece (27) is formed at the other end side of the housing (23) remote of the suction connection piece (26) and a mounting cap (38) which engages over the pressure connection piece (27) is formed at the filter cover (30). A flexible sleeve (39, 28) is inserted between the pressure connection piece (27) and the mounting cap (38) on the one hand and the suction connection piece (26) and opening (20) in the cup base (131) on the other hand and serves for the sealing, support and noise decoupling of the feed pump (22) in the filter cup (13).
Feed unit for delivering fuel from a supply tank (10), especially for internal combustion engines, with a filter cup (13) having a central chamber (14) and an annular chamber (15) enclosing the latter, with a filter cover (30) which closes the end side of the annular chamber (15) and which contains an inlet duct (36) to the annular chamber (15) and an outlet duct (37) from the annular chamber (15), which outlet duct (37) is enclosed by an outlet connection piece (40), with an electric fuel feed pump (22) which is inserted in the central chamber (14) and has a housing (23) with a pump inlet and pump outlet (24, 25), wherein the pump inlet (24) communicates with a suction connection piece (26) which is arranged at the end side of the housing and which projects through an opening (46) in the cup base (131) into a suction space (19), characterized in that the clearance diameter of the central chamber (14) is greater than the outer diameter of the housing (23) of the feed pump (22), in that a pressure connection piece (27) which projects axially and communicates with the pump inlet (24) is formed at the end side of the housing (23) remote of the suction connection piece (26) and a mounting cap (38) which communicates with the inlet duct (36) and engages over the pressure connection piece (27) is formed at the filter cover (30), and in that a sleeve (39 and 28, respectively) of elastic material is inserted between the pressure connection piece (27) and the mounting cap (38) on the one hand and the boundary edge of the opening (46) in the cup base (131) and the suction connection piece (26) on the other hand.
Dependencies are inferred from the claim text.