C3.3B Tier 4 Interim and EU Stage 3A Engines for Caterpillar Built Machines – Air Inlet and Exhaust System


Illustration 1g03330404

(1) Lock nut

(2) Thrust bearing

(3) Snap ring

(4) O-ring

(5) Thrust sleeve

(6) Piston ring

(7) Turbine wheel

(8) Turbine housing

(9) Actuator

(10) Compressor wheel

(11) Piston ting

(12) Oil deflector

(13) Bearing

(14) Snap ring

A turbocharger consists of a centrifugal compressor mounted on a common shaft with a turbine that is driven by exhaust gas. The turbocharger compresses the intake air and forces more air into the engine cylinders. This allows the engine to burn more fuel efficiently, producing more horsepower. When the boost pressure is relatively low, the turbocharger can reduce smoke concentration, concentration in the cylinder, fuel consumption and increase engine performance at elevated terrain. When the boost pressure is high, the turbocharger can provide a large increase in engine output by increasing the amount of air that is forced into the engine cylinders.

Boost Compensator

Illustration 2g03733087

(1) Injection pump assembly

(2) Boost compensator assembly

(3) Actuator

(4) Stop solenoid

(5) Plunger

(6) Stop solenoid guide

(7) Hi-idling body

Illustration 3g03733089

High boost

When boost pressure is high, fuel supply increases for more power.

Illustration 4g03733090

Low boost

When boost pressure is low it prevents over fueling, which decreases smoke at start-up and acceleration.

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