Portable emissions measurement adapter device
First Claim
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1. A portable emissions measurement adapter device (PEMAD) selectively connectable to a vehicle;
- wherein the vehicle has a vehicle exhaust system having a first exhaust pipe coupled to a second exhaust pipe, the pipes defining an air inlet opening therebetween, comprising;
an elongated tube having a first and a second end and adapted to fit through the second exhaust pipe and through the air inlet opening to sealingly mate with the first exhaust pipe at the first end to seal the first exhaust pipe from the air inlet opening so that exhaust flows from the first exhaust pipe to the elongated tube without mixing with air at the air inlet opening, and with the second end adapted for coupling to an emissions testing unit.
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Abstract
A portable emissions measurement adapter device (PEMAD) for a vehicle exhaust system having an first exhaust pipe coupled to a second exhaust pipe defining an air inlet opening therebetween, includes an elongated tube having a first and a second end and adapted to fit through the second exhaust pipe to sealingly mate with the first exhaust pipe at the first end. The second end is adapted for operative connection to an emissions testing unit. No modification of the production vehicle is required to use the PEMAD.
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Citations
17 Claims
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1. A portable emissions measurement adapter device (PEMAD) selectively connectable to a vehicle;
- wherein the vehicle has a vehicle exhaust system having a first exhaust pipe coupled to a second exhaust pipe, the pipes defining an air inlet opening therebetween, comprising;
an elongated tube having a first and a second end and adapted to fit through the second exhaust pipe and through the air inlet opening to sealingly mate with the first exhaust pipe at the first end to seal the first exhaust pipe from the air inlet opening so that exhaust flows from the first exhaust pipe to the elongated tube without mixing with air at the air inlet opening, and with the second end adapted for coupling to an emissions testing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- wherein the vehicle has a vehicle exhaust system having a first exhaust pipe coupled to a second exhaust pipe, the pipes defining an air inlet opening therebetween, comprising;
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13. A portable emissions measurement adapter device (PEMAD) for a diesel exhaust system having an exhaust pipe coupled to a passive exhaust cooler pipe to define a venturi flow opening therebetween, comprising:
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an elongated tube having a first and a second end and adapted to fit through the cooler pipe to sealingly mate with the exhaust pipe at the first end with the second end adapted for coupling to an emissions measurement testing device; wherein the tube has a narrowed opening at the first end with a stepped seat configured to abut the exhaust pipe; hook members configured to hook over the end of the cooler pipe when the first end of the tube is sealingly mated with the exhaust pipe; latch members pivotably operatively connected to the tube; arms pivotably connected to the latch members outward of the pivot point; and springs operatively connecting the hooks to the arms; wherein the hooks are tightened to the end of the cooler pipe by the springs and arms when the latch members are pivoted. - View Dependent Claims (14, 15)
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16. A method of measuring diesel exhaust emissions on a vehicle having an exhaust pipe and a cooler pipe, with an outlet of the exhaust pipe spaced from an inlet of the cooler pipe to define a venturi flow opening, comprising:
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extending a tube of an adapter device through the exhaust cooler pipe; abutting a first end of the tube to the exhaust pipe to seal the tube to the exhaust pipe; hooking arms secured to the tube to an end of the cooler pipe so that the adapter device is supported by the cooler pipe; and fitting an emissions measuring unit to second end of the tube. - View Dependent Claims (17)
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Specification