RHC62C 1144002720 Excavator Turbo 6BD1 Turbo For Hitachi EX200-2 EX200-3 Excavator

The turbocharger fitted on an excavator engine is an exhaustgasdriven air compression device. Its fundamental operational concept is harnessing exhaust gas energy to pressurize intake air, making diesel fuel burn more thoroughly and efficiently, thus substantially enhancing power output, curbing fuel waste and lowering black smoke emission concentrations.

Core Functions

Power Boosting EffectSamedisplacement engines obtain a 30%–50% power increase and notable torque growth with turbocharging, supporting strong performance under heavyload construction and hillclimbing conditions.

Fuel Efficiency & Emission Regulation EffectSufficient intake air guarantees full fuel combustion, cutting fuel consumption by about 5% and reducing black smoke, CO and hydrocarbon pollutant release amounts.

LowEnd Torque Gain EffectImproved lowspeed torque supplies greater working strength for excavator heavyload startup and digging operational activities.

Basic Structure (Three Key Functional Assemblies)

Turbine Side (Exhaust Assembly Component)Attached to the exhaust manifold unit, it receives 600–900 ℃ hightemperature exhaust gas that propels the turbine impeller wheel, spinning the main shaft at 100,000–200,000 rpm.

Compressor Side (Intake Assembly Component)Coaxially powered by the turbine shaft, the compressor wheel impeller compresses air cleaned by the air cleaner filter and feeds boostedpressure air into engine cylinder assemblies.

Center Bearing Unit (LubricationCooling Housing Component Assembly)Designed with floating bearings and engineoil coolinglubrication flow ducts, it withstands high thermal stress and ultrafast rotational speeds. Engine oil cools bearing components to stop sintering failure occurrences.

Working Principle (4Step Functional Mechanism Cycle)

Exhaust Gas Activation Driving StepHot highpressure exhaust gas flows into the turbine casing housing and rapidly rotates the turbine impeller wheel.

Coaxial Supercharging Movement StepThe turbine shaft drives the compressor impeller wheel to rotate synchronously at highspeed rotation velocity.

Intake Air Compression StepThe compressor draws in filtered fresh ambient air and compresses it to 0.1–0.2 MPa with air temperature elevation.

Intercooler Cooling Process StepHeated compressed air is cooled by the intercooler unit to raise air density, then enters engine cylinders for increased fuel injection and higher power output performance.