HE211W 3772742 Turbocharger ISF3.8 Engine Turbo Parts Components

The excavator turbocharger is an air compression device mounted on the engine and powered by exhaust gas. Its fundamental principle is utilizing waste exhaust energy to compress intake air, promoting more complete diesel combustion, thus markedly lifting power, curbing fuel burn and reducing black smoke release.

Core Functions

Power ElevationTurbocharging raises power by 30%–50% and torque significantly on samedisplacement engines, providing superior performance under heavyload working and uphill conditions.

FuelSaving & Emission MitigationPlenty of intake air supports full fuel combustion, cutting fuel consumption by about 5% and minimizing black smoke, carbon monoxide and HC emissions.

LowSpeed Torque EnhancementGreater lowrpm torque supplies higher power for excavator heavyload startup and digging activities.

Basic Structure (Three Key Component Groups)

Turbine End (Exhaust Side)Joined to the exhaust manifold, it is impacted by 600–900 ℃ hot exhaust gas, spinning the central shaft at 100,000–200,000 rpm via the turbine impeller.

Compressor End (Intake Side)Coaxially driven, the compressor wheel compresses air cleaned by the air filter and delivers pressurized air into engine cylinders.

Central Bearing Housing (CoolingLubrication Assembly)Incorporating floating bearings and engineoil lubricationcooling channels, it tolerates extreme heat and ultrahigh rotational speeds. Engine oil removes heat to avoid bearing sintering damage.

Working Principle (4Phase Working Mechanism)

Exhaust GasPowered RotationHot highpressure engine exhaust enters the turbine housing and spins the turbine wheel rapidly.

ShaftDriven Synchronous OperationThe turbine shaft turns the compressor impeller at matching ultrahigh rotational velocity.

Fresh Air PressurizationThe compressor inhales purified ambient air and compresses it to 0.1–0.2 MPa with temperature increase.

Intercooling Treatment ProcessHeated compressed air is cooled by the intercooler to boost density, then enters cylinders for more fuel injection and greater power production.