1 / 23

CATERPILLAR Common Rail Fuel System

Welcome to Malaga WeBex. CATERPILLAR Common Rail Fuel System. Orifice. Electronic Control Module (ECM ). ECM Controls: Fuel Pressure Speed Governing Air/Fuel Ratio Start/Stop Sequence Engine Protection Devices/ Diagnostics. Fuel Pump Function. Pump Raises Pressure

bivensb
Download Presentation

CATERPILLAR Common Rail Fuel System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Welcome to Malaga WeBex CATERPILLAR Common Rail Fuel System

  2. Orifice

  3. Electronic Control Module (ECM) • ECM Controls: • Fuel Pressure • Speed Governing • Air/Fuel Ratio • Start/Stop Sequence • Engine Protection Devices/ Diagnostics

  4. 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!

  5. Oil lubrication Fuel in from Secondary Filter Fuel Leak off to Tank To Fuel HP Manifold To Secondary Filter Pump Speed Position Sensor From Primary Filter Locks the Pump

  6. 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

  7. 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 Fuel Manifold Injector Lines High PRV Rail Pressure Sensor

  8. Fuel Pressure Relief Valve High 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

  9. Fuel Return from Head • Excess Fuel Returned to Transfer Pump • Not High Pressure Fuel Return from Head LIne

  10. Injector Function Injector De-energizes Valve Closes Unused fuel flows back to Transfer Pump via passage in the Head

  11. 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

  12. 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

  13. Advantages Meets emissions Lower fuel consumption Better transient response Cat Common Rail Fuel SystemC175 High Pressure Rail High Pressure Pump Primary Fuel Filter/ Water Separator Cooler Secondary Fuel Filters Fuel Tank Electric Priming Pump

  14. Cat Common Rail Fuel System • Low Pressure Fuel System • FTP • Electric Priming • Filtration

  15. Cat Common Rail Fuel System • Fuel System • HP Pump • Double Wall Lines • Double Wall Rails • Flow Limiter • Injector

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

  17. High Pressure Fuel System Hardware PRV PRV Outlet HP Outlet Oil Supply Camshaft FTV Drive Oil Return Flow Control Valve

  18. Flow Limiter • 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

  19. QUESTIONS ????

More Related