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Cooling system for an off-highway vehicle

  • US 6,216,778 B1
  • Filed: 12/30/1998
  • Issued: 04/17/2001
  • Est. Priority Date: 12/30/1998
  • Status: Expired due to Term
First Claim
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1. 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; and

    air from the discharge mouth flows through the second venturi aperture and along the exhaust stack, thereby drawing exhaust gas through the muffler pipe.

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