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CATERPILLAR Common Rail Fuel System CATERPILLAR Common Rail Fuel System Welcome to Malaga WeBex.

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Presentation on theme: "CATERPILLAR Common Rail Fuel System CATERPILLAR Common Rail Fuel System Welcome to Malaga WeBex."— Presentation transcript:

1 CATERPILLAR Common Rail Fuel System CATERPILLAR Common Rail Fuel System Welcome to Malaga WeBex

2 CATERPILLAR Common Rail Fuel System

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4 Orifice

5 CATERPILLAR Common Rail Fuel System Electronic Control Module (ECM) ECM Controls: –Fuel Pressure –Speed Governing –Air/Fuel Ratio –Start/Stop Sequence –Engine Protection Devices/ Diagnostics

6 CATERPILLAR Common Rail Fuel System Fuel Pump Function Pump Raises Pressure ECM tells Injector to Fire Rail Pressure Drops ECM Detects Pressure Drop –Sensed by Fuel Rail Pressure Sensor ECM tells Pump Solenoid to Increase Volume –Also tells Pump Solenoid to Spill fuel once pressure is reached Do it Again!

7 CATERPILLAR Common Rail Fuel System Fuel in from Secondary Filter To Fuel HP Manifold Pump Speed Position Sensor From Primary Filter Fuel Leak off to Tank To Secondary Filter Oil lubrication Locks the Pump

8 CATERPILLAR Common Rail Fuel System Transfer Pump Driven by High Pressure Pump Draws Fuel through Primary Filter Output Pressure 300 to 600 kPa Transfer Pump Primed by Priming Pump Hand or Electric

9 CATERPILLAR Common Rail Fuel System Fuel ManifoldInjector Lines High Pressure Fuel System Do’s & Don’ts Do Check for leaks Do Not Loosen HP Connection with Engine Running Do Replace HP Pipes After they are Loosened Do Replace ALL Hp Pipes if new manifold is Installed Do Not Force Pipes to Fit Do Cap Manifold and Injector Connections Immediately when HP Pipe is removed High PRV Rail Pressure Sensor

10 CATERPILLAR Common Rail Fuel System High Pressure Relief Valve Fuel Pressure Relief Valve Protects System from Over- Pressure Opens at Constant Pressure of 160 MPa (23,000 PSI) Withstands Spikes to 190 Mpa (27,500 PSI) Returns fuel to Tank

11 CATERPILLAR Common Rail Fuel System Fuel Return from Head LIne Fuel Return from Head Excess Fuel Returned to Transfer Pump Not High Pressure

12 CATERPILLAR Common Rail Fuel System Injector Function Injector De-energizes Valve Closes Unused fuel flows back to Transfer Pump via passage in the Head

13 CATERPILLAR Common Rail Fuel System Fuel Injector Do’s and Don’ts Do Write down the Injector Serial Number and Confirmation Code before you install the Injector Do use Cat ET to Program ECM with proper Injector Trim File Do Look for the Trim File CD in the Injector Box

14 CATERPILLAR Common Rail Fuel System Injector Adaptive TRIM Fuel System Optimization Routine Runs every hundred hours or so Audible changes when engine is running NO performance or Power Changes Everything’s OK Similar to HD ACERT engines

15 CATERPILLAR Common Rail Fuel System

16 Cat Common Rail Fuel System C175 Meets emissions Lower fuel consumption Better transient response Advantages High Pressure Rail High Pressure Pump Secondary Fuel Filters Fuel Tank Cooler Primary Fuel Filter/ Water Separator Electric Priming Pump

17 CATERPILLAR Common Rail Fuel System Cat Common Rail Fuel System  Low Pressure Fuel System  FTP  Electric Priming  Filtration

18 CATERPILLAR Common Rail Fuel System Cat Common Rail Fuel System  Fuel System  HP Pump  Double Wall Lines  Double Wall Rails  Flow Limiter  Injector

19 CATERPILLAR Common Rail Fuel System Cat Common Rail Fuel System - HP Rail HP Rail Double Wall Crossover Line Double Wall Lines From HP Pump To Rail Low Pressure Injector return Pressure Sensor

20 CATERPILLAR Common Rail Fuel System High Pressure Fuel System Hardware Oil ReturnFlow Control Valve PRV Outlet Oil Supply Camshaft FTV Drive HP Outlet PRV

21 CATERPILLAR Common Rail Fuel System Flow Limiter  Protection Device Against Cylinder Over Fueling  Piston Moves With Every Injection  Trips at Set Point To Prevent Continuous Injection and Remains Shut Spring Piston

22 CATERPILLAR Common Rail Fuel System

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