B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
172/20, 296/36
B62D 25/08 (2006.01) B60K 11/06 (2006.01) B60R 13/08 (2006.01)
Patent
CA 1073006
NOISE ATTENUATING ENGINE ENCLOSURE ABSTRACT The internal combustion engine of a tractor is housed within an engine enclosure comprising a top panel and a pair of side panels. Each side panel is provided with a plurality of perforated areas to permit engine cooling air to flow between the inside and -the outside of the enclosure. A secondary panel is pro- vided for each perforated area and is disposed inside the enclo- sure in spaced relationship from its associated wall panel. Each secondary panel is in registry with its associated per- forated area but is larger in area than its associated perfor- ated area, so that the edges of the secondary panel extend beyond the edges of the perforated area. This arrangement permits air to pass in or out of the enclosure in a path other than a straight line and serves to attenuate engine noise originating in the enclosure by preventing sound waves from passing in a direct path from the engine through the perfor- ated areas to the outside of the enclosure. One or more per- forated areas are provided in a fixed portion of the side panel as well as in a movable (hinged) portion of the side panel which opens to afford access to the interior of the engine enclosure.
240656
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