CVS system sample water vapor management
First Claim
1. An engine emissions test system comprising:
- a sampling conduit configured to receive a diluted exhaust gas comprising a mixture of make-up gas and exhaust from an engine;
at least one sample bag configured to store a sample of the diluted exhaust gas;
a fill circuit configured to communicate the sample of the diluted exhaust gas to the at least one sample bag, the fill circuit including a first gas line having a pump and a flow meter, and the fill circuit further including a second gas line in communication with a fill gas source, the second gas line configured to provide a fill gas to be mixed with the sample of diluted exhaust gas.
3 Assignments
0 Petitions
Accused Products
Abstract
An exhaust sampling system includes a pre-fill gas source having a pre-fill gas. A sampling conduit is configured to collect exhaust gas and make-up gas. A sample bag is fluidly connected to the sampling conduit and the pre-fill gas source. A controller is programmed to run a test procedure in which a sample of exhaust gas and make-up gas is collected in the sample bag. The controller sends a command that fills the sample bag with pre-fill gas prior to the test procedure. The pre-fill gas remains in the sample bag during the test procedure. In one example, the amount of pre-fill gas is selected to prevent the sample from condensing in the sample bag during the test procedure. In another example, the amount of pre-fill gas is selected to provide a sufficient volume of gases for analysis during the test procedure.
-
Citations
14 Claims
-
1. An engine emissions test system comprising:
-
a sampling conduit configured to receive a diluted exhaust gas comprising a mixture of make-up gas and exhaust from an engine; at least one sample bag configured to store a sample of the diluted exhaust gas; a fill circuit configured to communicate the sample of the diluted exhaust gas to the at least one sample bag, the fill circuit including a first gas line having a pump and a flow meter, and the fill circuit further including a second gas line in communication with a fill gas source, the second gas line configured to provide a fill gas to be mixed with the sample of diluted exhaust gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification