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US 2011/0252864 A1Published application
Emissions Test System And Method
OwnerMark Guenther, Dan Carpenter +6inventors
InventorsMark Guenther, Dan Carpenter, Jarret Zablocki, Fredric Schmidt, Richard Thomas Rooney, Timothy Alfred Nevius, Scott Thomas Porter, Leslie Hill
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Abstract
An emission test system may include at least one controller configured to determine, directly or indirectly, a quantity of diluted exhaust sample in a container at the completion of an emissions test, and to cause additional diluent gas to be added to the container based on the determined quantity.
Claims11
An engine emissions test system comprising:
- a mixing junction configured to mix at least a portion of an exhaust sample from the engine with a diluent gas to form a diluted exhaust sample;
- a container configured to collect at least a portion of the diluted exhaust sample;
- and
- at least one controller configured to determine a quantity of the diluted exhaust sample collected within the container and to cause additional diluent gas to be added to the container based on the determined quantity such that the quantity of gas within the container is increased to at least a target quantity sufficient to flush a gas analyzer configured to analyze the gas collected within the container.
1 more element
A method for emissions testing comprising:
- collecting an exhaust sample from an engine;
- diluting the exhaust sample with a diluent gas to form a diluted exhaust sample;
- collecting at least a portion of the diluted exhaust sample within a container;
- determining a quantity of the diluted exhaust sample within the container;
- and
- causing additional diluent gas to be added to the container based on the determined quantity to increase the quantity of gas within the container to a target quantity.
3 more elements
An emissions test system comprising:
- a container configured to collect diluted or un-diluted exhaust gas from an engine;
- and
- at least one controller configured to (i) determine a parameter that depends on at least one of a quantity of gas within the container and a concentration of gas within the container and (ii) cause diluent gas to be added to the container based on the determined parameter to increase the quantity of gas within the container to at least a target quantity.
An exhaust sampling system comprising:
- a pre-fill gas source having a pre-fill gas;
- a sampling conduit configured to collect exhaust gas and diluent gas;
- a sample container fluidly connected to the sampling conduit and the pre-fill gas source;
- and
- a controller programmed to run a test procedure in which a sample of the exhaust gas and diluent gas is collected in the sample container, the controller configured to (i) send a command that fills the sample container with a desired amount of pre-fill gas prior to the test procedure, with the pre-fill gas remaining in the sample container during the test procedure, (ii) determine a quantity of the pre-fill gas, exhaust gas and diluent gas in the sample container after the test procedure, and (iii) send a command that adds additional gas to the sample container based on the determined quantity to increase the quantity of gas within the sample container to a target quantity.
2 more elements
A method of collecting an exhaust gas sample comprising:
- pre-filling a sample container with a pre-fill gas;
- collecting an exhaust sample in the sample container with the pre-fill gas remaining in the sample container;
- determining a quantity of the pre-fill gas and exhaust sample in the sample container;
- and
- adding post-fill gas to the sample container based on the determined quantity to increase the quantity of gas within the sample container to a target quantity, wherein collecting an exhaust sample in the sample container with the pre-fill gas remaining in the sample container includes collecting a sample that has been diluted based upon a dilution ratio corresponding to:
- prefillconvol
- +
- dilutionvol
- +
- postfillconvol
- samplevol
- +
- 1
- where prefillconvol, dilutionvol, postfillconvol and samplevol respectively correspond to the pre-fill gas, dilution gas, post-fill gas and sample exhaust gas quantities relating to the sample container.
11 more elements
Dependencies are inferred from the claim text.