Patent ID: 6216778
Filing Date: 2001-04-17
Classification: F01P,F04D,Y10S

Abstract:
In a off-highway-vehicle cooling system including a heat exchanger; a fan mechanism for flowing air along a flow path through the heat exchanger; and an air receiving structure vented to ambient air; the improvement wherein:the fan mechanism is a centrifugal fan mechanism and includes a housing and a fan in the housing;the fan has forward curved blades, thereby to reduce system noise;the system is mounted adjacent to an engine compartment containing an engine;the housing includes a discharge mouth in air flow communication with the receiving structure;the housing and the receiving structure define a first venturi aperture therebetween;the first venturi aperture is in air flow communication with the engine compartment, thereby drawing cooling air through such compartment and across the engine;the engine has a muffler pipe connected thereto for flowing exhaust gas from the engine;the receiving structure has an exhaust stack connected thereto;the exhaust stack and muffler pipe are spaced from one another and define a second venturi aperture therebetween; andair from the discharge mouth flows through the second venturi aperture and along the exhaust stack, thereby drawing exhaust gas through the muffler pipe.