US 12,276,222 B2
Controllable mechanical motor vehicle coolant pump
Laurent Finidori, Bertrange (FR); Jerome Kremer, Inglange (FR); Gilles Simon, Montois la Montagne (FR); and Gilles Rybicki, Metz (FR)
Assigned to PIERBURG PUMP TECHNOLOGY GMBH, Neuss (DE)
Appl. No. 18/561,295
Filed by PIERBURG PUMP TECHNOLOGY GMBH, Neuss (DE)
PCT Filed May 20, 2021, PCT No. PCT/EP2021/063544
§ 371(c)(1), (2) Date Nov. 16, 2023,
PCT Pub. No. WO2022/242866, PCT Pub. Date Nov. 24, 2022.
Prior Publication US 2024/0247606 A1, Jul. 25, 2024
Int. Cl. F01P 5/10 (2006.01); F04D 13/02 (2006.01); F04D 15/00 (2006.01); F04D 29/42 (2006.01)
CPC F01P 5/10 (2013.01) [F04D 13/02 (2013.01); F04D 15/0038 (2013.01); F04D 29/426 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A controllable mechanical motor vehicle coolant pump comprising:
a drive shaft which extends in an axial pump direction and which is configured to rotate and to be mechanically driven by an engine of a motor vehicle;
a coolant pump wheel which is co-rotatably connected with the drive shaft and which is configured to pump a liquid coolant;
a transverse housing surface which extends substantially transversely with respect to the drive shaft and which radially surrounds the drive shaft;
a cylindrical inner slider support surface which radially surrounds the drive shaft and which is coaxial to the drive shaft, the transverse housing surface and the cylindrical inner slider support surface each being defined by a first housing element;
a control slider which is substantially pot-shaped and which is configured to be axially shiftable with respect to the coolant pump wheel so as to control an effective discharge flow cross-section of the coolant pump wheel, the control slider comprising,
a substantially cylindrical slider side wall which is configured to radially surround the coolant pump wheel, and
a slider bottom wall which extends substantially transversely with respect to the drive shaft and which is arranged axially between the coolant pump wheel and the transverse housing surface, the slider bottom wall comprising a radially inner bottom wall surface which is shiftably supported by the cylindrical inner slider support surface;
a push-out pressure chamber which,
is arranged between the slider bottom wall and the transverse housing surface,
is defined at one axial side by the transverse housing surface and radially inwardly by the cylindrical inner slider support surface, and
is configured to be hydraulically pressurized so as to generate a hydraulic push-out push force which pushes the slider bottom wall toward the coolant pump wheel; and
an auxiliary pumping unit which is configured to hydraulically pressurize the push-out pressure chamber, the auxiliary pumping unit comprising,
an auxiliary pumping unit side channel which is defined by a separate second housing element which is arranged between the coolant pump wheel and the transverse housing surface, and
an auxiliary pumping unit pump wheel which is provided on a back side of the coolant pump wheel facing the separate second housing element.