US 4,071,009 AGranted

Combined noise suppressing and air flow guide enclosure for engines

AssigneeCaterpillar Tractor Co.

InventorJack H. Kraina

Life of this patent

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Abstract

An internal combustion engine has an enclosure mounted therearound comprising an outer enclosure having a horizontally disposed hood positioned over a top of the engine and a pair of vertically disposed sidewalls positioned on either side thereof. An inner enclosure, disposed within the outer enclosure, comprises a horizontally disposed upper wall which is spaced vertically between the top of the engine and the hood to define first and second airflow passages therewith, the second airflow passage being further defined in part by the sidewalls. The inner enclosure further comprises a vertically disposed forward wall positioned adjacent to the front of the engine. An airflow guide means is secured internally on each of the sidewalls to define a passage therebetween which communicates with the second airflow passage defined about the engine. A first outlet means is defined rearwardly on each of the sidewalls to communicate airflow from the first airflow passage to ambient whereas a second outlet is defined at the bottom of the enclosure and beneath the engine for communicating the second airflow passage to ambient. The hood, sidewalls and upper and forward walls of the inner enclosure each have a layer of sound absorbing material secured thereon.

Claims19

Dependent claims

A combined noise suppressing and airflow guide enclosure mounted on a vehicle in substantial surrounding relationship about an engine thereof, an inlet having a radiator disposed therein forwardly of said engine and a fan rotatably mounted between said engine and said radiator for drawing air into said enclosure, said enclosure comprising

outer enclosure means substantially surrounding said engine comprising a horizontally disposed hood positioned over a top of said engine and a pair of vertically disposed sidewalls positioned on either side of said engine, each of said sidewalls comprising a door movably mounted on said enclosure for exposing said engine directly and having a layer of sound-absorbing material secured internally thereon,
inner enclosure means disposed in substantial isolated relationship within said outer enclosure means comprising a horizontally disposed upper wall comprising a layer of sound-absorbing material and positioned in vertically spaced relationship between said hood and the top of said engine to define a first airflow passage between said hood and said upper wall and to further define, along with said sidewalls, a second airflow passage about the top and sides of said engine and
airflow guide means secured internally on each of said doors to define a passage therebetween communicating air from said radiator to said second airflow passage.

Dependencies are inferred from the claim text.

Facts

Application: 05/700,274Filed 28 Jun 1976
Granted: 31 Jan 1978
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B60R 13/0884
Insulating elements, e.g. for sound insulation: for mounting around noise sources, e.g. air blowers
B60R 13/0838
Insulating elements, e.g. for sound insulation: for engine compartments
F01P 1/02
Air cooling: arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
F01P 11/12
Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00: filtering, cooling, or…