Generation of nitrogen dioxide for use with burner-based exhaust replication system
AssigneeSouthwest Research Institute
InventorsRyan Hartley, Robert T. Henderson, III, Cary Henry
Life of this patent
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Abstract
A method of using a burner-based exhaust replication system to generate exhaust that contains nitrogen dioxide (NO2). An example of such as system is a system used to test automotive exhaust aftertreatment devices. A fluid that decomposes to generate NO2 as one of its decomposition products is selected. The fluid is heated thereby generating NO2, with the amount and duration of heating is controlled to result in a desired decomposition extent of NO2 from the fluid. The fluid is then delivered to an exhaust stream of the system.
Claims14
A method of using a burner-based exhaust replication system to generate exhaust that contains nitrogen dioxide (NO2), comprising:
- selecting a fluid that decomposes to generate NO2 as one of its decomposition products;
- heating the fluid, thereby generating NO2;
- wherein the amount and duration of heating is controlled to result in a desired decomposition extent of NO2;
- delivering the NO2 to an exhaust stream of the test system;
- and
- metering the fluid prior to the heating step, or metering the NO2 delivered to the exhaust stream, to provide a desired amount of NO2 into the exhaust stream.
An improved burner-based exhaust replication system, the exhaust replication system having an exhaust line that carries an exhaust stream as output of the test system, the improvements comprising:
- a decomposition reactor, operable to receive a fluid that decomposes to generate NO2 as one of its decomposition products and to heat the fluid, thereby generating NO2;
- a controller operable to control the amount and duration of heating to result in a desired decomposition extent of NO2;
- a conduit for delivering the NO2 from the decomposition reactor to the exhaust stream of the test system;
- and
- a meter upstream or downstream the decomposition reactor, operable to provide a desired amount of NO2 into the exhaust stream.
Dependencies are inferred from the claim text.