Exhaust flow directional device

Details Exhaust flow directional device Exhaust flow directional device

1977-12-22

1979-03-13

Peters, Jr., Joseph F.

Motor vehicles

Power

Hoods

180 1FV, F01N 720

Patent

active

041437314

ABSTRACT:
An airfoil is mounted on the exhaust pipe of a tractor trailer vehicle generally forward the exhaust pipe opening so as to be upstream of the exhaust pipe in the airflow deflected by a drag reducer mounted on the tractor roof forward the exhaust pipe. The airfoil splits the deflected airflow around the exhaust pipe. The airfoil has a pervious portion located generally below the exhaust pipe opening to allow airflow therethrough to prevent a low pressure buildup in the area generally below the exhaust pipe opening. The airfoil also has an airflow impervious portion located generally above the exhaust pipe opening to create a low pressure behind the impervious portion and generally above the exhaust opening to thereby draw the exhaust flow upwardly into the deflected airflow.

REFERENCES:
patent: 572415 (1896-12-01), Dunmore
patent: 1738279 (1929-12-01), Barries
patent: 2582905 (1952-01-01), Harmon
patent: 2630748 (1953-03-01), Brockelsby
patent: 3788072 (1974-01-01), Burger
patent: 3952823 (1976-04-01), Hinderks
patent: 4018472 (1977-04-01), Mason

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