| 摘要 |
A metering pump, especially for feeding fuel to a vehicle heater, comprising a delivery plunger ( 50 ), which can be moved to and fro for delivering liquid medium, a guide sleeve ( 42 ), which partially accommodates the delivery plunger ( 50 ) and guides same for the reciprocating movement, wherein the guide sleeve ( 42 ) with an inner surface ( 46 ) thereof defines a pump ejection chamber ( 48 ) and it defines with an outer surface ( 60 ) thereof a channel arrangement ( 74 ) leading to the pump ejection chamber ( 48 ), wherein the guide sleeve ( 42 ) is carried in a carrier element ( 24 ) and is in contact with the carrier element ( 24 ) by its outer surface ( 60 ) essentially over the entire circumference in a first length area ( 58 ) and is located with its outer surface at a spaced location from the carrier element ( 24 ) in a second length area ( 64 ), wherein the channel arrangement ( 74 ) is provided between the carrier element ( 24 ) and the guide sleeve ( 42 ) in its second length area ( 64 ), is characterized in that in its second length area ( 64 ), the guide sleeve ( 42 ) has at least one support area ( 78, 80, 82, 84 ), with which it is supported in relation to the carrier element ( 24 ).
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