Arrangement for feeding fuel from supply tank to internal combustion engine of power vehicle

Claim 1

An arrangement for feeding fuel to an internal combustion engine of a power vehicle, comprising a supply tank; a feeding pump having a pump chamber, a rotor rotatable in said pump chamber, a suction side connected with said supply tank, a pressure side connectable with the internal combustion engine, said rotor having two end sides and being provided on at least one of said end sides with a rim-shaped feeding member having a first feeding member rim and a second feeding member rim which are arranged so that said first feeding member rim is surrounded by said second feeding member rim; means forming a wall of said chamber which is adjacent to said feeding member, said wall being provided with two substantially ring-shaped side passages which are located opposite to said feeding member rims and open toward the latter; a suction opening and a pressure opening, one of said side passages being an inner side passage and connected with said suction opening, while the other of said side passages being an outer side passage and being connected with said pressure opening, said inner side passage having an end portion located behind said suction opening, said outer side passage having a partial region located before said pressure opening as considered in a flow direction; means forming an intermediate passage in which said end portion of said inner side passage merges and which merges into said partial region of said outer side passage, said means forming said chamber wall including a member, said member in the region of said intermediate channel being provided with a throughgoing opening wherein said side passages having a predetermined cross-section, said intermediate passage having a cross-section which is greater than said cross-section of said side passages and which diverges in the flow direction starting from said inner side passage and narrows after said outer side passage, said feeding pump having a knee-shaped projection which extends into said intermediate passage, said throughgoing opening being arranged in the flow direction behind said projection.