Cooling fan system for a motor vehicle
First Claim
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1. A cooling fan system for a motor vehicle having an engine and a radiator, the cooling fan system comprising:
- a first fan adapted to be disposed between the engine and the radiator, said first fan adapted to rotate in a first direction; and
a second fan adapted to be disposed between the engine and the radiator, said second fan disposed in series with said first fan and adapted to rotate in a second direction, said second direction being counter to said first direction;
said first fan mounted for rotation about a first axis of rotation and said second fan mounted for rotation about a second axis of rotation, said first axis of rotation being spaced from said second axis of rotation.
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Abstract
A cooling fan system includes an engine driven mechanical fan and an electrically driven fan. The mechanical fan and the electrical fans are placed in series within a common shroud that directs air between them. In one application, the electrical fan generates an axially directed air flow and the mechanical fan produces a radially directed air flow. The electrical fan is rotated counter to the mechanical fan.
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Citations
18 Claims
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1. A cooling fan system for a motor vehicle having an engine and a radiator, the cooling fan system comprising:
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a first fan adapted to be disposed between the engine and the radiator, said first fan adapted to rotate in a first direction; and a second fan adapted to be disposed between the engine and the radiator, said second fan disposed in series with said first fan and adapted to rotate in a second direction, said second direction being counter to said first direction; said first fan mounted for rotation about a first axis of rotation and said second fan mounted for rotation about a second axis of rotation, said first axis of rotation being spaced from said second axis of rotation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A cooling fan system for a motor vehicle having an engine and a radiator, the cooling fan system comprising:
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an electrically driven fan adapted to be disposed between the engine and the radiator, said electrically driven fan adapted to rotate in a first direction; and a mechanically driven fan adapted to be disposed between the engine and the radiator, said mechanically driven fan disposed in series with said electrically driven fan and adapted to rotate in a second direction, said second direction being counter to said first direction; wherein said electrically driven fan is configured to generate a substantially axially directed flow and said mechanically driven fan is configured to generate a substantially radially directed flow. - View Dependent Claims (8, 9, 10, 11)
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12. A motor vehicle comprising:
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an engine capable of operating at various rotational speeds; a radiator mounted fore of said engine; and a cooling fan system including an electrically driven fan and a mechanically driven fan; a clutch coupling said engine to said mechanically driven fan, said clutch capable of allowing said mechanically driven fan to operate at a rotational speed substantially less than said rotational speed of said engine while said rotational speed of said engine is less than 4000 revolutions per minute; said electrically driven fan disposed between the engine and the radiator, said electrically driven fan adapted to rotate in a first direction; said mechanically driven fan disposed between the engine and the radiator in series with said electrically driven fan, said mechanically driven fan and adapted to rotate in a second direction, said second direction being counter to said first direction; said electrically driven fan mounted for rotation about a first axis of rotation and said mechanically driven fan mounted for rotation about a second axis of rotation, said first axis of rotation being spaced from said second axis of rotation. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification