| 摘要 |
<p>ENGINE COOLING FAN An automotive engine cooling fan assembly including asymmetrical plastic fan blades and a torsion bar interconnecting each blade to the hub of the assembly, the asymmetrical blades responding to both aerodynamic and centrifugal forces to reduce the pitch thereof at high fan speeds, the entire fan blade subassembly being rotated as a result of the twisting of the torsion bar.</p> |
