Diesel Engine Management Systems Steve Baker

Diesel Engine Management Systems Steve Baker

Basic Diesel Fuel Delivery System 1. Fuel Return Line 2. Fuel Injection Pump 3. Injectors 4. Fuel Filter 5. Fuel Tank 6. Swirl Pot 7. Fuel Feed Line Low Pressure High Pressure Spill Return

Air Intake System

Engine Management Systems L- Series 2.0 Litre EDC 15 M47R 2.0 Litre DDE4

Advantages of EDC Greater Fuel Economy Reduced Exhaust Emissions Reduced Engine Noise More Effective Cold Starting Smoother Engine Operation

Electronic Control Module (ECM)

EDC 15 System Inputs

Crankshaft Position Sensor (CKP)

Injector Needle Lift Sensor

Coolant Temperature Sensor (ECT) Cº 

Manifold Absolute Pressure Sensor (MAP)

Throttle Potentiometer

Brake Pedal Switch

Inlet Air Temperature/Mass Air Flow Sensor (IAT/MAF)

Immobilisation Signal

Vehicle Speed Sensor

Inputs Ignition Switch Air Con Request

Inputs Trinary Switch Evaporator Temperature Sensor

System Outputs

Glow Plug

Malfunction Indicator Lamp (MIL)

Air Conditioning Compressor Switching Input ComponentOffOn Accelerator Pedal Position Sensor Above 85  Below 80  ECT Sensor 118  c (244  f)112  c (234  f) A/C Pressure Sensor Low Limit High Limit 1.6 Bar(23.2psi) 29 Bar (421 psi) 2.0 Bar (29 psi) 23 Bar (334 psi)

Cooling Fan Switching Input Component Fan Speed OnOff ECT Sensor: A/C Models Non A/C Models Low High 104°c(219°) 112°c(234°) 104°c(219°) 98°c (208°f) 106°c (223°f) 98°c (208°f) A/C SwitchLowWith Switch A/C Pressure Sensor High19 Bar (275 psi) 14 Bar (203psi)

1.Fuel Inlet 2.Fuel Outlet (Spill) 3.Timing Device Plunger Fuel Injection Pump

4.ECU (micro controller) 5.Axial Piston 6.Distributor Sleeve 7.Hydraulic Head 8.Fuel Quantity Solenoid Valve 9.Outlet to Fuel Injector 10.Non Return Valve 11.Timing Device Solenoid Fuel Injection Pump

12. Timing Device Solenoid Valve 13. Intermediate Chamber 14. Cam Plate 15. Timing Ring 16. Toothed Wheel 17. Supply Pump 18. Drive Pulley 19. Drive Plate

Can Bus Messages

Exhaust Gas Recirculation

ROVER 25 EDC15M ECM OVERVIEW

ROVER 25 EDC15M ECM FUELING

ROVER 25 EDC15M ECM DRIVER DEMAND SENSORS

ROVER25 EDC15M ECM INPUTS/OUTPUTS

DDE 4

What Is Common Rail Injection? A System Where All Injectors Are Fed Via a Shared Fuel Line First Developed by Elasis in Italy First Prototype System in 1993 Idea Bought & Developed by Bosch

Advantages of Common Rail Injection Fuel Injected at the Exact Time Required Precise Metering of Fuel Required Constant High Fuel Pressures Optimised Fuel Consumption

Advantages of Common Rail Injection Reduced Emissions Very Smooth Engine Operation Allows Two Stage Injection

Injection Characteristics Standard Common Rail

Fuel Delivery System

Fuel Delivery Schematic 1.Pressure Sensor and Fuel Filter 2.Pressure Relief Valve 3.High Pressure Injection Pump 4.In Line Electric Fuel Pump (Medium Pressure) 5.Bi-metallic By-pass Valve 6.Fuel Cooler 7.Fuel Pump

Low Pressure Pump

High Pressure Pump

System Inputs

Crankshaft Position Sensor

Camshaft Sensor

Mass Air Flow Sensor

Pedal Demand Sensor

Coolant Temperature Sensor (ECT) Cº V

Coolant Temperature Sensor (ECT) Cº V

Low Pressure Sensor

High Pressure Sensor

Boost Pressure Sensor Pedal Switches

Immobilisation (EWS3)

Automatic Gearbox

System Outputs

Outputs Fuel Pump Relay Main Relay Air Con Relay Cooling Fan Relay

Outputs Fuel Pump Relay Main Relay Air Con Relays

Outputs Fuel Pump Relay Main Relay Air Con Relay Cooling Fan Relay

Fuel Pressure Regulator

Glow Plug ECU

Glow Plug Pre-heat Seconds Degrees Celsius

Injectors

Injectors Closed

Injectors Open

Injectors

Exhaust Gas Recirculation

Cruise Control Component Layout

Cruise Control Control Diagram

Cruise control

Cruise Control

Testbook Real Time Display

Engine Roughness

Engine Roughness Fuel Correction

Pedal Demand Sensors

Cruise Control