3799504 3799505 Travel Motor Gearbox Turbocharger HE400WG QSL9.3 Engine Excavator Replacement Parts

An exhaust actuated air compressor fitted to the excavator engine, the turbocharger leverages exhaust gas energy to compress intake air. This improves diesel combustion efficiency, greatly raising power output, cutting fuel waste and reducing black smoke release.

Core Functions

Power EnhancementSame displacement engines gain 30%–50% more power and greatly improved torque via turbocharging, supporting stronger heavy load and climbing performance.

Fuel Conservation & Emission CutSufficient air intake guarantees complete combustion, lowering fuel consumption by about 5% and reducing black smoke, carbon monoxide and hydrocarbon emissions.

LowSpeed Torque GainEnhanced low rpm torque offers greater force for excavator heavy load startup and digging operations.

Basic Structure (Three Core Units)

Turbine Section (Exhaust Side)Connected to the exhaust manifold, 600–900 ℃ hightemperature exhaust gas hits the turbine impeller, spinning the main shaft at 100,000–200,000 rpm.

Compressor Section (Intake Side)Coaxially powered, the compressor wheel compresses air filtered by the air cleaner and feeds pressurized air into engine cylinders.

Center Housing Assembly (Bearings & Lubrication)Equipped with floating bearings and engine oil heat dissipation lubrication channels, it resists high temperature and ultra fast rotation. Engine oil cools bearings to prevent sintering damage.

Working Principle (4 Step Operation)

Exhaust Gas ImpulseHigh heat high pressure exhaust flows into the turbine casing and rotates the turbine wheel rapidly.

Synchronous Shaft Driven SuperchargingThe turbine shaft drives the compressor impeller to spin at the same high speed.

Air Compression ProcessThe compressor sucks filtered fresh air and compresses it to 0.1–0.2 MPa with temperature rise.

Intercooler CoolingWarm compressed air is cooled by the intercooler to increase density before entering cylinders, enabling more fuel injection and higher power output.