AIR MANAGEMENT SYSTEM FOR UNDER-HOOD HEAT CONTROL

摘要

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.

主权项

1. A vehicle capable of on-road highway travel, the vehicle comprising an operator compartment; an engine compartment, the engine compartment being defined at least in part by a raisable hood having a top and sides; an engine in the engine compartment; a radiator, the radiator receiving coolant from the engine; a first ventilating system downstream of the radiator, the first ventilating system comprising ducting having an exhaust exit to ambient through the hood and at least one electric or hydraulic fan adapted to draw air through the radiator, 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 out of an exhaust exit toward a forward part of the engine compartment through the hood.