2674A027 2674A152 Excavator Turbocharger S2A Turbo Diesel Engine Excavator Machine Components

The turbocharger installed on an excavator engine is an air compressor powered by engine exhaust. Its key principle is utilizing waste exhaust energy to compress intake air, enabling more complete diesel combustion, which noticeably boosts power output, curbs fuel consumption and diminishes black smoke emissions.

Core Functions

Power UpgradingFor engines with equal displacement, turbocharging increases power by 30%–50% with remarkable torque growth, providing robust performance under heavy loads and climbing scenarios.

Fuel Efficiency & Emission MitigationPlenty of intake air ensures full fuel combustion, reducing fuel use by around 5% and lowering black smoke, CO and HC discharge levels.

Torque Boost at Low SpeedsHigher low rpm torque delivers greater power for excavator heavy load startup and digging activities.

Basic Structure (Three Critical Modules)

Turbine End (Exhaust Side)Attached to the exhaust manifold, it receives 600–900 ℃ hot exhaust gas that pushes the turbine impeller, rotating the central shaft at 100,000–200,000 rpm.

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

Central Hub (Bearing & Lubrication System)Featuring floating bearings and engine oil cooling lubrication ducts, it withstands high heat and ultra high rotational velocity. Engine oil removes heat to stop bearing seizure.

Working Principle (4 Phase Cycle)

Exhaust Gas Driving ForceHot high pressure engine exhaust enters the turbine housing and spins the turbine wheel at high velocity.

Coaxial Supercharge OperationThe turbine shaft turns the compressor impeller synchronously at high speed.

Intake Air PressurizationThe compressor draws in purified fresh air and compresses it to 0.1–0.2 MPa, increasing air temperature.

Intercooling TreatmentHot compressed air is cooled by the intercooler to raise density, then enters cylinders for extra fuel injection and higher power generation.