Dosing pump assembly
AssigneeGrundfos A/S
InventorJan Plougmann
Life of this patent
Estimating the term…
Abstract
A dosing pump assembly (9) is provided which is adapted to admix a liquid reducing agent to an exhaust gas flow. The dosing pump assembly includes an assembly housing (12) that houses an electric drive (15), a transmission (16), a membrane pump (17), and control and/or regulating electronics. The assembly housing (10) further includes a pre-mixing device in which the liquid reducing agent is impinged upon with a pressurized gas flow.
Claims2
A metering pump assembly for admixing a fluid reduction agent into an exhaust gas flow of a combustion engine, comprising:
- an assembly housing containing an electrical drive;
- a transmission;
- a membrane pump;
- at least one of control and regulation electronics;
- and
- at least a portion of a pre-mixer, the membrane pump being fluidly connected between a reduction supply and the pre-mixer, the pre-mixer being in fluid communication with a pressurized air flow and the exhaust gas flow, the pre-mixer including a pre-flushing valve arranged within the assembly housing by which an exit conduit of the pump selectively connects to a conduit which leads to a tank for the reduction agent, or to a conduit leading to one of a first valve and the exhaust gas flow.
A metering pump assembly for admixing a fluid reduction agent into an exhaust gas flow of a combustion engine, comprising:
- an assembly housing containing an electrical drive and a connection for a pressurized air supply conduit;
- a transmission:
- a membrane pump;
- at least one of control and regulation electronics;
- and at least a portion of a pre-mixer, the membrane pump being fluidly connected between a reduction supply and the pre-mixer, the pre-mixer being in fluid communication with a pressurized air flow through a conduit and the exhaust gas flow, the pre-mixer including a shut-off valve disposed within the assembly housing which lies in the conduit leading to the pressurized air.
Dependencies are inferred from the claim text.