RHB6 8944183200 Turbocharger EX120-1 EX150W ISUZU 4BD1-T Excavator Machine Parts

Mounted on the excavator engine, the turbocharger is an exhaustgaspowered air compression unit. Its core function principle harnesses exhaust thermal energy to pressurize intake air, enabling more thorough diesel combustion, which greatly boosts power output, curtails fuel waste and reduces black smoke release.

Core Functions

Power BoostingTurbocharging delivers a 30%–50% power increase and significant torque rise for samedisplacement engines, providing robust performance during heavyload work and hill climbing.

FuelSaving & Emission Reduction EffectsSufficient intake air guarantees complete fuel combustion, lowering fuel consumption by around 5% and decreasing black smoke, carbon monoxide and HC pollutant levels.

LowSpeed Torque OptimizationEnhanced lowrpm torque supplies greater strength for excavator heavyload startup and digging tasks.

Basic Structure (Three Indispensable Structural Parts)

Turbine End (Exhaust Side)Connected with the exhaust manifold, 600–900 ℃ highheat exhaust gas impacts the turbine wheel, rotating the central shaft at 100,000–200,000 rpm.

Compressor End (Intake Side)Driven by the same central shaft, the compressor impeller compresses air purified by the air filter and delivers pressurized air into engine cylinders.

Central Hub Assembly (BearingCoolingLubrication System)Equipped with floating bearings and engineoil heatdissipationlubrication ducts, it resists high temperatures and ultrahigh rotation speeds. Engine oil cools bearings to prevent sintering damage.

Working Principle (4Phase Functional Process)

Exhaust Gas Energy Transfer StepHot highpressure engine exhaust enters the turbine housing and spins the turbine impeller at high velocity.

Synchronous Coaxial Rotation StepThe turbine shaft turns the compressor wheel at the same ultrahigh speed.

Air Compression StepThe compressor sucks cleaned fresh air and compresses it to 0.1–0.2 MPa with temperature elevation.

Intercooling StepHot compressed air is cooled by the intercooler to raise density before entering cylinders, allowing more fuel injection and higher power generation.