Air management system for heavy duty truck under-hood heat control
First Claim
1. A vehicle capable of on-road highway travel, the vehicle comprising:
- an operator compartment,a windshield forming a part of a front wall of the operator compartment,an engine compartment,an engine in the engine compartment,a radiator in front of the engine, the radiator receiving coolant from the engine,a first ventilating system attached behind the radiator and forming an enclosure behind the radiator, the enclosure preventing air drawn through the radiator from entering the engine compartment, the first ventilating system comprising at least one fan,a duct attached to the first ventilating system, the duct forming a smooth channel guiding air exhausted from the first ventilating system rearwardly along an exterior surface of the vehicle, the air exhausted from the duct being directed into the ambient slip stream of the vehicle when the vehicle is moving forward, anda second ventilating system arranged to flow air through the engine compartment, the second ventilating system comprising an induction cowl cooperative with the windshield to flow ambient air into the engine compartment when the vehicle is moving forward and an exhaust exit into a low pressure area of the duct forward of the cowl and downstream of the fan.
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Accused Products
Abstract
A system for removing heat from the engine compartment (9) of a heavy duty truck. A first ventilating system removes heat from the radiator. It is isolated from a second ventilating system that removes heat from the engine compartment. The first system takes heat from the radiator through a plenum by centrifugal squirrel cage blowers, and is directs it out to ambient by ductwork. The second system draws ambient air generally from back to front of the engine compartment, preferably by cowl induction, without the use of ram air from the vicinity of the radiator. The exits of the two systems are into a slip stream of the heavy duty truck, and the exit of the second ventilating system is into a slip stream of the first, to scavenge air out of the engine compartment.
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Citations
19 Claims
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1. A vehicle capable of on-road highway travel, the vehicle comprising:
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an operator compartment, a windshield forming a part of a front wall of the operator compartment, an engine compartment, an engine in the engine compartment, a radiator in front of the engine, the radiator receiving coolant from the engine, a first ventilating system attached behind the radiator and forming an enclosure behind the radiator, the enclosure preventing air drawn through the radiator from entering the engine compartment, the first ventilating system comprising at least one fan, a duct attached to the first ventilating system, the duct forming a smooth channel guiding air exhausted from the first ventilating system rearwardly along an exterior surface of the vehicle, the air exhausted from the duct being directed into the ambient slip stream of the vehicle when the vehicle is moving forward, and a second ventilating system arranged to flow air through the engine compartment, the second ventilating system comprising an induction cowl cooperative with the windshield to flow ambient air into the engine compartment when the vehicle is moving forward and an exhaust exit into a low pressure area of the duct forward of the cowl and downstream of the fan. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle capable of on-road highway travel, the vehicle comprising:
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an operator compartment, a windshield forming a part of a front wall of the operator compartment, an engine compartment, an engine in the engine compartment, a radiator in front of the engine, the radiator receiving coolant from the engine, a first ventilating system attached behind the radiator and forming an enclosure behind the radiator, the enclosure preventing air drawn through the radiator from entering the engine compartment, the first ventilating system comprising at least one fan and a duct attached to the first ventilating system downstream of the fan, the duct forming a smooth channel guiding air exhausted from the first ventilating system rearwardly along an exterior surface of the vehicle, and a second ventilating system arranged to flow air through the engine compartment, the second ventilating system comprising an induction cowl cooperative with the windshield to draw air into the engine compartment when the vehicle is moving forward and an exhaust exit into a low pressure area of the duct. - View Dependent Claims (8, 9, 10)
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11. A vehicle capable of on-road highway travel, the vehicle comprising an operator compartment;
- an engine compartment;
an engine in the engine compartment;
a radiator in front of the engine, the radiator receiving coolant from the engine;a first ventilating system behind the radiator, the first ventilating system comprising a plenum attached to the radiator forward of the engine, at least one fan mounted to the plenum, and ducting having an exhaust exit to ambient, said at least one fan being arranged to draw air through the radiator, and to push air through the ducting and out the exhaust exit of the first ventilating system, the first ventilating system being constructed to prevent air drawn through the radiator from entering the engine compartment; and a second ventilating system constructed to remove heat from the engine compartment, the second ventilating system being constructed to flow ambient air into a rear part of the engine compartment and to exhaust air heated by the engine compartment toward an exit in a forward part of the engine compartment, the system being so constructed and arranged that exhaust air from the first ventilating system draws air out the exit of the second ventilating system into a low pressure area created by the first ventilating system downstream of the fan at the forward part of the engine compartment. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
- an engine compartment;
Specification