Aggregate for feeding fuel from supply tank to internal combustion engine of motor vehicle

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being inclined relative to a radial plane of said impeller and opposite to a rotary direction of said impeller.

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being inclined relative to a radial plane of said impeller and opposite to a rotary direction of said impeller, said recesses being formed as inclined recesses extending radially outwardly in a peripheral surface of said outer ring.

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being inclined relative to a radial plane of said impeller and opposite to a rotary direction of said impeller, said recesses being formed as inclined recesses extending radially inwardly in a region of said feeding passage.

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being inclined relative to a radial plane of said impeller and opposite to a rotary direction of said impeller, said inclined recesses including recesses which extend radially outwardly in a peripheral direction of said outer ring and radially inwardly in a region of said feeding passage, said radially inwardly extending recesses and said radially outwardly extending recesses being distributed alternatingly.

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being inclined relative to a radial plane of said impeller and opposite to a rotary direction of said impeller, said inclined recesses having a cross-section which increases in a rotary direction of said impeller.

Aggregate for feeding fuel from a supply tank to an internal combustion engine of a motor vehicle, comprising a feeding pump formed as a flow pump and including a disc-shaped rotatable impeller having an axis, axial end faces, and a plurality of radially extending vanes;

• means forming a cylindrical pump chamber and including two oppositely located end walls limiting said pump chamber in an axial direction of said impeller and a ring wall limiting said pump chamber in a peripheral direction of said impeller;
• means forming an inlet opening and an outlet opening, said end walls each having a partial ring shaped groove extending around said axis of said impeller at a height of said vanes of said impeller and forming together with said impeller a feeding passage, said feeding passage extending from said inlet opening to said outlet opening;
• means forming a hydraulic buffer between said impeller and said end walls of said pump chamber and including recesses provided in a structure selected from said axial end faces of said impeller and said end walls of said pump chamber, so that said recesses are fillable with fuel during operation of said feeding pump and form said hydraulic buffer which acts in an axial direction of said impeller and stabilizes said impeller;
• and an outer ring which connects said vanes of said impeller at their radially outer ends and limits said impeller in a peripheral direction, wherein said recesses being arranged in a region of said outer ring, said recesses being formed as angled recesses with a first region directed radially toward said impeller and a second region leading away from said first region opposite to a rotary direction of said impeller and in a peripheral direction of said impeller.