HOUSING 4N5831 - Caterpillar

Illustration 1 g00810615
Rear view and right side view of the air inlet and exhaust components
High pressure gas
(1) Air cleaner
(2) Air filter service indicator
(3) Turbocharger
(4) Exhaust elbow
(5) Exhaust bypass valve
(6) Air line
(7) Exhaust manifold
(8) Aftercooler
(9) Carburetor
Illustration 2 g00812908
Rear view
Low pressure gas (Deltec)
(1) Air cleaner
(3) Turbocharger
(4) Exhaust elbow
(9) Carburetor
Illustration 3 g01257543
Low pressure gas (IMPCO)
(1) Air cleaner
(3) Turbocharger
(9) Carburetor Air is pulled through the air inlet of air cleaner (1). Air cleaner service indicator (2) indicates the cleanliness of the air filter element.Note: The engine can operate with high pressure gas or low pressure gas. With high pressure gas, the carburetor is located immediately after the aftercooler. The air is mixed with the fuel after the air has been turbocharged and aftercooled. With low pressure gas, the carburetor is located immediately after the air cleaner. The mixture of air and fuel is turbocharged and aftercooled.
Illustration 4 g00810651
Low pressure gas
Flow of air from the air inlet through the carburetor
(3) Turbocharger
(6) Air line
(8) Aftercooler
(10) Throttle body For high pressure gas, the air is compressed by the compressor wheel of turbocharger (3). The warm compressed air flows through air line (6) and into aftercooler (8) for cooling. The air flows into carburetor (9) and the air is mixed with the fuel.For low pressure gas, the mixture of air and fuel is compressed by the compressor wheel of turbocharger (3). The warm compressed mixture flows through air line (6) and into aftercooler (8) for cooling. The mixture flows into throttle body (10).
Illustration 5 g00810657
Flow of air and fuel through the air inlet manifold
The air/fuel mixture enters the air inlet manifold and the mixture is distributed to the cylinder heads. The air/fuel mixture is drawn through the openings of the inlet valves of the cylinders for combustion.
Illustration 6 g00810663
Flow of the exhaust gas out of the cylinder heads through the exhaust system (top view)
(3) Turbocharger
(4) Exhaust elbows
(5) Exhaust bypass valve
(7) Exhaust manifold After combustion, the exhaust gas exits the cylinders through the openings of the exhaust valves into exhaust manifold (7). The exhaust gas enters turbocharger (3) in order to drive the turbocharger's turbine wheel. The turbine wheel drives the compressor wheel. Some of the exhaust gas is diverted away from the turbocharger to exhaust elbow (4) by exhaust bypass valve (5). Exhaust gas from the turbocharger also exits the engine through the exhaust elbow.