Patent ID: 6474943
Filing Date: 2002-11-05
Classification: F01P,F04D

Abstract:
A fan shroud for a vehicle comprising:air directing means for controlling airflow between a core portion of a heat converter portion and fan blades of a cooling fan, the air directing means covering a side periphery of the fan blades of the cooling fan, the air directing means having an offset portion disposed about an offset section of the fan blades and a non-offset portion disposed about a non-offset section of the fan blades, the offset portion having an offset overlap ratio at the offset section of the fan blades, the non-offset portion having a non-offset overlap ratio at the non-offset section of the fan blades, each of the offset and non-offset overlap ratios being defined as ratios of axial dimensions of the air directing means that axially covers a portion of the fan, blades relative to the overall axial depth of the fan blades, the non-offset portion including a first section disposed adjacent the offset portion and a second section disposed adjacent the first section, the non-offset overlap ratio having a first non-offset overlap ratio at the first section and a second non-offset overlap ratio at the second section, the first non-offset overlap ratio at the first section being greater than the offset overlap ratio at the offset portion, the second non-offset overlap ratio at the second section being greater than the first non-offset overlap ratio at the first section.