Pump assembly
AssigneeDelphi Technologies Holding S.arl
InventorKeith E. Wright
Life of this patent
Estimating the term…
Abstract
A pump assembly for use in a selective catalytic reduction system, the pump assembly comprising: a pump sub-assembly defining a pump axis; and a housing sub-assembly including a cavity for receiving the pump sub-assembly and comprising an inlet port for receiving a reagent for supply to the pump sub-assembly via a flow path; wherein at least one seal member is provided to seal the pump sub-assembly within the housing sub-assembly, the seal member being provided in a groove in an outer face of the pump sub-assembly, the seal member providing a fluid tight seal.
Claims14
A pump assembly for use in a selective catalytic reduction system, the pump assembly comprising:
- a pump sub-assembly defining a pump axis;
- and
- a housing sub-assembly including a cavity for receiving the pump sub-assembly and comprising an inlet port for receiving a reagent for supply to the pump sub-assembly via a flow path;
- wherein at least one seal member is provided to seal the pump sub-assembly within the housing sub-assembly, the seal member being provided in a groove in an outer face of the pump sub-assembly, the seal member providing a fluid tight seal
- and wherein the pump sub-assembly comprises a pump core, an outer pole member and a solenoid coil, the core, pole member and coil being provided within a coil over-moulding member.
A method of manufacturing a pump assembly comprising manufacturing a pump sub assembly by:
- providing a blank disk member of a material having a relatively high magnetic permeability;
- deep drawing the blank disk member to form an outer pole piece, the outer pole piece defining an internal volume with an opening;
- providing a coil former, the coil former defining an internal volume;
- winding coil wire onto the coil former to form a solenoid coil;
- inserting the solenoid coil into the internal volume of the outer pole piece;
- pressing a back stop plate into the outer pole piece, the back stop plate having at least one drilling through the plate;
- injection moulding an over-mould member to encapsulate the outer pole piece and solenoid coil;
- forming at least one flow port through the over-moulding member, the at least one flow port aligning with the at least one drilling in the back stop plate;
- forming at least one groove in the outer face of the over-mould member.
Dependencies are inferred from the claim text.