Fan shroud for vehicle mounted heat converter

摘要

A fan shroud (3) is provided for a cooling fan (2) that is partially offset relative to a core portion (1a) of a vehicle mounted heat converter (1). The fan shroud (3) has a ring portion (3a) that is offset from the core portion (1a). The fan shroud (3) also has a ring portion (3b) and a connection portion (3c) that are not offset from the core portion (1a). The fan shroud (3) has an overlap ratio defined as a ratio of the portion of the fan blades covered by the fan shroud (3) in the cooling fan (2) to the axial depth (front end to rear end) of blades. The overlap ratio at the offset ring portion (3a) is set smaller than the overlap ratio at the other ring portion (3b) and the connection portion (3c). <IMAGE>