24100-1870B Turbocharger Replacement RHC7 Turbo For NH170048 Diesel Engine

The turbocharger for an excavator is an exhaustdriven air compression device installed on the engine. Its essential principle is using waste exhaust energy to pressurize intake air, promoting more thorough diesel combustion, which substantially lifts power, curtails fuel consumption and minimizes black smoke release.

Core Functions

Power BoostingTurbocharging increases power by 30%–50% and torque significantly on samedisplacement engines, providing stronger capability under heavy loads and uphill operation.

FuelSaving & Emission ControlPlenty of intake air guarantees complete fuel combustion, reducing fuel usage by around 5% and lowering black smoke, carbon monoxide and HC emission levels.

LowSpeed Torque GainHigher lowrpm torque delivers greater strength for excavator heavyload startup and digging operations.

Basic Structure (Three Key Subassemblies)

Turbine End (Exhaust Side)Attached to the exhaust manifold, 600–900 ℃ hightemperature exhaust gas strikes the turbine wheel, rotating the central shaft at 100,000–200,000 rpm.

Compressor End (Intake Side)Coaxially powered, the compressor impeller compresses air filtered by the air filter and delivers boosted air into engine cylinders.

Central Hub Assembly (Bearing & Lubrication System)Equipped with floating bearings and engineoil heatexchangelubrication channels, it resists high heat and ultrahigh rotational speed. Engine oil cools bearings to stop sintering failure.

Working Principle (4Phase Process)

Exhaust Gas Energy TransferHot highpressure exhaust enters the turbine housing and spins the turbine impeller rapidly.

Synchronous Coaxial OperationThe turbine shaft turns the compressor wheel at matching ultrahigh speeds.

Intake Air CompressionThe compressor draws in clean fresh air and compresses it to 0.1–0.2 MPa with temperature elevation.

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