CVS System Sample Water Vapor Management

• US 20150338320A1
• Filed: 08/03/2015
• Published: 11/26/2015
• Est. Priority Date: 09/15/2006
• Status: Active Grant

• Current Assignee: AVL Test Systems, Inc.
• Original Assignee: AVL Test Systems, Inc.
• Inventors: SILVIS, William Martin, WILLIAMSON, James Patrick
• Granted Patent: US 10,151,670 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01M 15/102 by monitoring exhaust gases
• CPC Class Codes: G01N 1/2252 in a vehicle exhaust
• CPC Class Codes: G01N 2001/2255 with dilution of the sample
• CPC Class Codes: G01N 2001/2264 with dilution

Abstract

An engine emissions test system according to the principles of the present disclosure includes a sampling conduit, at least one sample bag, a read circuit, and a fill circuit. The sampling conduit is configured to receive exhaust from an engine. The at least one sample bag is configured to store a sample of exhaust. The read circuit is configured to communicate the stored sample of exhaust between the at least one sample bag and an analyzer. The fill circuit includes a fill gas line configured to provide a fill gas to be mixed with the sample of exhaust. The fill gas line extends between a fill gas source and the read circuit.

Claims

1. An engine emissions test system comprising:

a sampling conduit configured to receive exhaust from an engine;

at least one sample bag configured to store a sample of exhaust;

a read circuit configured to communicate the stored sample of exhaust between the at least one sample bag and an analyzer; and

a fill circuit including a fill gas line configured to provide a fill gas to be mixed with the sample of exhaust, the fill gas line extending between a fill gas source and the read circuit.

2. The system of claim 1, wherein the read circuit includes first and second read line sections, wherein the first read line section doubles as a portion of the fill circuit configured to communicate the sample of exhaust between the sampling conduit and the at least one sample bag.

3. The system of claim 2, wherein the fill circuit further includes a pump and a flow meter.

4. The system of claim 3, wherein the second read line section includes a pump and a flow meter, the pump and flow meter of the second read line section each being provided between the first read line section and the analyzer.

5. The system of claim 4, wherein the second read line section includes a valve between the pump of the second read line section and the flow meter of the second read line section.

6. The system of claim 2, wherein the fill circuit includes a sample gas line extending between the sampling conduit and the first read line section for communicating the sample of exhaust from the sampling conduit to the at least one sample bag.

7. The system of claim 1, wherein the fill gas is nitrogen.

8. An engine emissions test system comprising:

at least one sample bag configured to store a sample of exhaust from an engine;

a first gas line configured to communicate the sample of exhaust from the at least one sample bag to an analyzer; and

a second gas line extending between a fill gas source and the first gas line for providing a fill gas to be mixed with the sample of exhaust.

9. The system of claim 8, further comprising a sampling conduit configured to receive exhaust from the engine.

10. The system of claim 9, further comprising a third gas line extending between the sampling conduit and the first gas line for providing the sample of exhaust to the at least one sample bag.

11. The system of claim 10, wherein the first gas line includes first and second sections, the first section being configured to (i) communicate the sample of exhaust from the third gas line to the at least one sample bag, and (ii) communicate the stored sample of exhaust from the at least one sample bag to the second section, the second section being configured to communicate the sample of exhaust from the first section to the analyzer.

12. The system of claim 10, wherein the sampling conduit is configured to receive a dilution gas to be mixed with exhaust from the engine.

13. The system of claim 12, wherein the first and third gas lines are configured to communicate a portion of the diluted exhaust from the sampling conduit to the at least one sample bag.

14. The system of claim 12, wherein the dilution gas is different than the fill gas.

15. An engine emissions test system comprising:

a sampling conduit configured to receive exhaust from an engine;

at least one sample bag configured to store a sample of exhaust;

a first gas line configured to communicate exhaust from the sampling conduit to the at least one sample bag; and

a second gas line extending between a fill gas source and the first gas line for providing a fill gas to the at least one sample bag.

16. The system of claim 15, further comprising a third gas line extending between the first gas line and an analyzer for communicating the stored sample of exhaust from the at least one sample bag to the analyzer.

17. The system of claim 16, wherein the first gas line includes a first pump and a first flow meter.

18. The system of claim 17, wherein the second gas line includes a second pump and a second flow meter.

19. The system of claim 18, wherein the third gas line includes a third pump and a third flow meter.

20. The system of claim 15, wherein exhaust from the engine is diluted with a dilution gas in the sampling conduit, and the first gas line is configured to communicate the diluted exhaust from the sampling conduit to the at least one sample bag.