Exhaust volume measurement device
First Claim
1. A vehicle exhaust measurement system comprising:
- a conduit defined by an outer wall and having an conduit inlet and a conduit outlet;
an make-up air tube connected to and in fluid communication with said conduit inlet, said make-up air tube providing make-up air for mixing with an exhaust gas;
a mixed gas tube connected to and in fluid communication with said conduit outlet, said mixed gas tube conveying a mixture of the make-up air and the exhaust gas to analysis equipment; and
an exhaust gas tube extending through said outer wall of said conduit, and a mixing plate disposed in at least one of said conduit and said mixed gas tube with said exhaust gas tube extending to a position adjacent to said mixing plate, said exhaust gas tube conveying the exhaust gas to said mixing plate to mix the exhaust gas and the make-up air at said mixing plate.
4 Assignments
0 Petitions
Accused Products
Abstract
A vehicle exhaust measurement system is provided includes that a conduit having a conduit inlet and a conduit outlet. A make-up air tube is connected to and is in fluid communication with the conduit inlet. The make-up air tube provides make-up air for mixing an exhaust gas. A mixed gas tube is connected to and is in fluid communication with the conduit outlet. The mixed gas tube conveys a mixture of make-up air and exhaust gas to analysis equipment. In the preferred embodiment, the exhaust gas tube extends through an outer wall of the conduit. A mixing plate is arranged in either the conduit or the mixed gas tube with the exhaust gas tube extending to a position adjacent to the mixing plate. The exhaust gas tube conveys the exhaust gas to the mixing plate to mix the exhaust gas and the make-up air at the mixing plate. A correction factor may be applied to the measurements taken by a differential pressure based fluid flow measurement device such as a smooth approach orifice (SAO) to provide an adjusted flow of measurement at the flow measurement device to correct for the pressure pulsations. The correction factor is calculated based upon the intensity of the pulsations of the differential pressure signal, which indicates the flow through the SAO.
19 Citations
10 Claims
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1. A vehicle exhaust measurement system comprising:
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a conduit defined by an outer wall and having an conduit inlet and a conduit outlet;
an make-up air tube connected to and in fluid communication with said conduit inlet, said make-up air tube providing make-up air for mixing with an exhaust gas;
a mixed gas tube connected to and in fluid communication with said conduit outlet, said mixed gas tube conveying a mixture of the make-up air and the exhaust gas to analysis equipment; and
an exhaust gas tube extending through said outer wall of said conduit, and a mixing plate disposed in at least one of said conduit and said mixed gas tube with said exhaust gas tube extending to a position adjacent to said mixing plate, said exhaust gas tube conveying the exhaust gas to said mixing plate to mix the exhaust gas and the make-up air at said mixing plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10-29. -29. (Canceled)
Specification