Intelligent bag filling for exhaust sampling system
First Claim
1. An exhaust sampling system for an engine, the exhaust sampling system comprising:
- a source of exhaust gas;
an exhaust collection unit including at least one collection bag that selectively receives at least one of said exhaust gas, a diluent gas, and a mixture of said exhaust gas and said diluent gas;
a sample probe in fluid communication with said source of exhaust gas and operable to selectively supply said at least one collection bag with at least one of said exhaust gas, said diluent gas, and said mixture at an extraction rate; and
a controller operable to permit the flow of at least one of said exhaust gas, said diluent gas, and said mixture from said sample probe to said at least one collection bag in a first state of said controller and operable to prevent the flow of at least one of said exhaust gas, said diluent gas, and said mixture from said sample probe to said at least one collection bag in a second state of said controller, said controller determining said extraction rate of said sample probe during a test phase based on a time during said test phase at which the engine is switched to an ON state.
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Accused Products
Abstract
An exhaust sampling system for an engine is provided. The exhaust sampling system may include a source of exhaust gas, an exhaust collection unit including at least one collection bag that selectively receives the exhaust gas, and a sample probe in fluid communication with the source of exhaust gas that selectively supplies the at least one collection bag with the exhaust gas. The exhaust sampling system may also include a controller that permits flow of the exhaust gas from the sample probe to the at least one collection bag in a first state and prevents flow of the exhaust gas from the sample probe to the at least one collection bag in a second state. The controller may determine an extraction rate of the sample probe based on an ON time of the engine during a test phase.
56 Citations
30 Claims
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1. An exhaust sampling system for an engine, the exhaust sampling system comprising:
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a source of exhaust gas; an exhaust collection unit including at least one collection bag that selectively receives at least one of said exhaust gas, a diluent gas, and a mixture of said exhaust gas and said diluent gas; a sample probe in fluid communication with said source of exhaust gas and operable to selectively supply said at least one collection bag with at least one of said exhaust gas, said diluent gas, and said mixture at an extraction rate; and a controller operable to permit the flow of at least one of said exhaust gas, said diluent gas, and said mixture from said sample probe to said at least one collection bag in a first state of said controller and operable to prevent the flow of at least one of said exhaust gas, said diluent gas, and said mixture from said sample probe to said at least one collection bag in a second state of said controller, said controller determining said extraction rate of said sample probe during a test phase based on a time during said test phase at which the engine is switched to an ON state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A controller for an exhaust sampling system that includes a dilution tunnel in which exhaust gas from an engine is mixed with a dilution gas, at least one sample probe configured to extract a sample of the diluted exhaust gas from the dilution tunnel, a sample collector configured to collect the sample of the diluted exhaust gas, at least one sample line configured to deliver the sample of the diluted exhaust gas from the at least one sample probe to the sample collector, and at least one control valve disposed in the at least one sample line and configured to regulate the rate at which the sample probe extracts the sample of the diluted exhaust gas from the dilution tunnel, the controller being configured to:
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determine when the engine is switched to an ON state; and determine a target extraction rate of the sample probe during a test phase based on a time during said test phase at which the engine is switched to the ON state; and control the position of the at least one control valve to achieve the target extraction rate. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method for controlling an exhaust sampling system that includes a dilution tunnel in which exhaust gas from an engine is mixed with a dilution gas, at least one sample probe configured to extract a sample of the diluted exhaust gas from the dilution tunnel, a sample collector configured to collect the sample of the diluted exhaust gas, at least one sample line configured to deliver the sample of the diluted exhaust gas from the at least one sample probe to the sample collector, and at least one control valve disposed in the at least one sample line and configured to regulate the rate at which the sample probe extracts the sample of the diluted exhaust gas from the dilution tunnel, the method comprising:
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determining when the engine is switched to an ON state; and determining a target extraction rate of the sample probe during a test phase based on a time during said test phase at which the engine is switched to the ON state; and controlling the position of the at least one control valve to achieve the target extraction rate. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification