Cooling fan system for automotive vehicle

By adopting a fan design with an annular fixed hub and movable blades in the internal combustion engine cooling system, the problem of the fan blades and hub blocking the air flow is solved, achieving more efficient air flow and cooling effects, reducing energy consumption, and adapting to different conditions. Cooling requirements under speed conditions.

Inactive Publication Date: 2012-07-18
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the vane arrangement in the '228 patent is not in the center of the radiator where the cooling air would have the most beneficial effect
At the same time, such a blade arrangement does not solve the problem of blocking air caused by the fan hub

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Such as figure 1 As shown, cooling system 10 includes a radiator 12 having a fan shroud 14 mounted thereon. The axial fan element 22 is mounted in a circular hole 30 formed in the fan case 14 . The fan element 22 includes a number of fan blades 26 mounted to a circular bearing surface 24, which is an annular structure on which each fan blade 26 is mounted. Bearing surface 24 defines the inner surface of fan element 22 . Bearing surface 24 and fan element 22 are journalled to hub 18 with bearings 32, while hub 18 is stationary. Hub 18 may be mounted to fan shroud 14, or to another stationary engine or vehicle component. It is important that the hub 18 does not rotate. Instead, fan element 22 rotates on hub 18 . By virtue of being mountable to a rotating engine shaft, such as the crankshaft 80, or the fan motor 112 ( Figure 4 ) on the pulley 74, belt 78 and pulley 76 provide power for this rotation. The belt 78 thus acts as an elastic power transmission member pul...

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PUM

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Abstract

A cooling system for an internal combustion engine mounted within a vehicle includes a radiator for rejecting heat to ambient air and an axial fan mounted within a fan shroud associated with a radiator. The fan has a stationary hub equipped with louvers which may be controlled so as to either block off or allow airflow through the hub, and consequentially through the radiator. In this manner, theairflow past the fan may be greatly increased when the vehicle is operated at a higher groundspeed, while decreasing the amount of power consumed by the fan.

Description

technical field [0001] The invention relates to a fan system for drawing ambient air through a radiator in a cooling system of an internal combustion engine. Background technique [0002] Both engine-driven and hydraulically or electrically driven radiator cooling fans have been used in internal combustion engines for nearly a century. These cooling fans typically comprise a multi-bladed element mounted on a centrally located motor. US Patent No. 5,660,149 and US Patent No. 6,342,741, and published application publication No. US2004 / 0223845 all disclose typical radiator cooling fans in which the motor is mounted in the center of the fan array. This type of fan configuration has one major disadvantage. Namely, if the car is running at high or even moderate ground speeds, the ram air entering the car in front of the radiator builds up enough pressure to force the surrounding air through the radiator, but the fan blades and hubs severely block the air flow. While some fans h...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F01P5/04F04D19/00F04D29/38F04D25/04F04D25/06F01P7/12
CPCF04D29/582F04D29/329F01P7/10F01P5/06F04D27/003F04D29/059F04D29/563
OwnerFORD GLOBAL TECH LLC