Reductant dosing manifold

• US 8,393,142 B2
• Filed: 04/30/2010
• Issued: 03/12/2013
• Est. Priority Date: 04/30/2010
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Mupparapu, Shashank, Isada, Raymond Upano, Roozenboom, Stephan D., Errera, Michael R., Tiller, Bryce L.
• Primary Examiner(s): Bomberg, Kenneth
• Assistant Examiner(s): LEE, BRANDON DONGPA
• Application Number:
  US12/771,665
• Publication Number:
  US 20110265459A1
• Time in Patent Office: 1,047 Days
• Field of Search: 602/86, 603/23, 603/03, 602/95, 417/454, 417/313, 417/559, 137/884, 13756501-56536, 222/318
• US Class Current: 60/286
• CPC Class Codes: F01N 2590/00 Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
• CPC Class Codes: F01N 2610/02 the substance being ammonia or urea
• CPC Class Codes: F01N 2610/10 the substance being heated, e.g. by heating tank or supply line of the added substance
• CPC Class Codes: F01N 2610/14 Arrangements for the supply of substances, e.g. conduits
• CPC Class Codes: F01N 3/2066 Selective catalytic reduction [SCR]
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y10T 137/85978 With pump
• CPC Class Codes: Y10T 137/87885 Sectional block structure

Abstract

A reductant dosing manifold is disclosed. The reductant dosing manifold may have a housing with a pump interface configured to directly connect the reductant dosing manifold to a reductant pump, and a reductant supply passage in fluid communication with the pump interface. The housing may also have a reductant outlet port, and a pressurized reductant passage connecting the pump interface to the reductant outlet port.

Claims

1. A power system, comprising:

an engine having an exhaust passage;

a generator driven by the engine to generate electricity;

a battery configured to store electricity generated by the generator;

an air compressor powered by the engine to compress air;

a reductant injector associated with the exhaust passage;

a reductant supply tank; and

a reductant dosing cabinet mounted on a platform, the reductant dosing cabinet including;

a reductant pump mounted on the platform;

a reductant dosing manifold connected to the reductant pump and mounted on the platform, wherein the reductant dosing manifold includes;

an air inlet port connected to the air compressor;

an air outlet port connected to the reductant injector;

a reductant inlet port connected to the reductant tank; and

a reductant outlet port connected to the reductant injector, wherein

each of the air inlet and outlet ports and the reductant inlet and outlet ports is disposed on a same side of the platform.

2. The power system of claim 1, further including:

a frame connected to the platform; and

a plurality of panels connected to the frame to at least partially enclose the reductant pump and the reductant dosing manifold.

3. The power system of claim 2, wherein the plurality of panels includes a connection panel attached to the frame, and each of the air inlet and outlet ports and the reductant inlet and outlet ports extends through the connection panel on a front side of the platform.

4. The power system of claim 3, wherein the plurality of panels includes ventilated side panels attached to the frame.

5. The power system of claim 4, wherein:

the plurality of panels includes a rear panel attached to the frame; and

the reductant dosing cabinet further includes an electronic control module attached to the rear panel and in communication with the reductant pump and the reductant dosing manifold.

6. The power system of claim 1, wherein:

the engine further includes an aftertreatment component located within the exhaust passage downstream of the reductant injector; and

the reductant dosing cabinet is electrically connected to the aftertreatment component.

7. The power system of claim 1, further including a reductant buffer tank in fluid communication with the reductant supply tank.

8. The power system of claim 1, wherein the reductant dosing manifold further includes a control valve mounted in fluid communication with a pressurized reductant passage.

9. The power system of claim 8, wherein the reductant dosing manifold further includes:

a first pressure sensor in fluid communication with the pressurized reductant passage; and

a second pressure sensor in fluid communication with the air outlet port.

10. The power system of claim 8, wherein the reductant dosing manifold further includes a reductant return passage in fluid communication with the control valve.

11. The power system of claim 10, wherein the reductant return passage is located within the platform.

12. The power system of claim 1, wherein the reductant dosing manifold further includes a pressure regulator between the air inlet and outlet ports.

13. The power system of claim 12, wherein the reductant dosing manifold further includes a first valve element and a second valve element, the second valve element configured to selectively allow pressurized air passing through the pressure regulator to move the first valve element.

14. The power system of claim 1, further including a reductant tank adapter configured to be connected to a reductant buffer tank, the adapter extending through the platform.