Electronic Diesel Control

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Electronic Diesel Control

• RUFO Project
• Fuel Injection Systems
• Palestine Polytechnic University
• An-Najah National University

Theoretical Part
Eng. Fuad Daoud
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Introduction

• This presentation is prepared for educational
  purposes as a part of the RUFO project Fuel
  Injection Systems.
• The aim of this project is to give learners easy
  access to the knowledge of modern fuel injection
  systems using Blended E-Learning.
• This is a joint project between Palestine
  Polytechnic University and Al-Najah National
  University.
• Project team Leader - Dr. Momen Sughayyer, SME -
  Eng. Fuad Daoud, Eng. Ashraf Zoghayyer, and Eng.
  Mosa Zallom, MME - Mr. Zaid Sharaf, and Mr. Sameh
  Barbarwi.

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Content
Objectives To explain the fundamentals of EDC. To
show the fuel delivery system operation. To
describe the function of the system
components. To explain the function and operation
of VE-EDC pump.
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Objectives

• To explain the fundamentals of EDC.
• To show the fuel delivery system operation.
• To describe the function of the system
  components.
• To explain the function and operation of VE-EDC
  pump.

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Electronic Diesel Control (EDC)

• System Overview
• The system composed from three main categories
  Sensors, Electronic control unit, and Actuators,
  sensors supply the control unit with information
  regarding the vehicle's operating condition the
  control unit evaluates these information, and
  send signals to actuators in order to control the
  fuel quantity.

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Bosch VE with EDC

• 1. Accelerator position (APP) sensor
• 2. Battery
• 3. Crankshaft position (CKP) sensor
• 4. EDC control unit
• 5. Engine coolant temperature (ECT) sensor
• 6. Exhaust gas recirculation (EGR) solenoid
• 7. Fuel filter
• 8. Fuel injection pump
• 9. Fuel injector (with needle lift sensor)
• 10. Fuel tank
• 11. Glow plug relay
• 12. Glow plug
• 13. Glow plug warning lamp
• 14. Ignition switch
• 15. Malfunction indicator lamp (MIL)
• 16. Mass air flow (MAF) sensor
• 17. Vehicle speed sensor (VSS)

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1) Accelerator position (APP) sensor

• The APP sensor can comprise of a potentiometer,
  signals from the APP sensor are used by the ECM
  to determine the exact accelerator position.
• 1. Potentiometer and idle/full load switch
• 2. Spring
• 3. Shaft

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2) Battery

• Source of energy to the system

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3) Crankshaft position (CKP) sensor

• This sensor contains a permanent magnet partly
  enclosed in a soft iron core and partly in a
  field winding the tip of the sensor is
  positioned close to the flywheel ring gear, as
  the teeth or pins of the trigger wheel pass the
  sensor the magnetic field changes, inducing a
  voltage signal which is sent to the engine
  control module (ECM).
• 1. Soft iron core
• 2. Field winding
• 3. Permanent magnet
• 4. Flywheel ring gear
• 5. TDC pin

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4) EDC control unit

• The EDC control unit assumes the following
  tasks-
• Regulate Injection quantity by sending control
  signals to the quantity adjuster.
• The EDC control unit calculates the commencement
  of injection depending on the influencing factors
  such as, engine speed sensor, coolant temperature
  sensor, needle lift sensor etc, and issues the
  corresponding output command to the commencement
  of injection valve in the injection pump.
• Regulate charge pressure and exhaust gas
  recirculation.
• Controlling the glow plug system and the
  auxiliary heater.
• Controlling the cruise control system.

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5) Engine coolant temperature (ECT) sensor

• The engine coolant (ECT) sensor probe is immersed
  in coolant and changes its resistance in
  proportion to engine coolant temperature changes.
  the sensor incorporates a negative temperature
  coefficient (NTC) resistor, which decreases in
  resistance as the temperature rises.
• 1. Electrical connections
• 2. Housing
• 3. NTC resistor

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6) Exhaust gas recirculation (EGR) solenoid

• To reduce the oxides of nitrogen emitted by the
  exhaust, a proportion of the exhaust gas can be
  returned to the inlet, manifold when operating
  conditions allow, this is done by EGR.

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7) Fuel filter

• It is used to eliminate water and dirty from
  diesel

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8) Fuel injection pump

• EDC pump, is used to pump the fuel throughout the
  system
• 1. Potentiometer for
• control-collar position
• 2. Quantity adjuster
• 3. Electric cut-off valve
• 4. Plunger
• 5. Solenoid valve
• for start of injection
• 6. Control Collar
• 7. Timing device

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9) Fuel injector (with needle lift sensor)

• It has an integral inductive sensor, at the
  commencement of injection the magnetic setting
  pin moves upwards and induces an alternating
  current into the sensor windings, this
  information, together with signals from the
  crankshaft position sensor, is used by the engine
  control module (ECM) to measure the injection
  timing.
• 1. Setting pin
• 2. Sensor winding
• 3. Pressure pin
• 4. Electrical connector

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10. Fuel tank

• It is used to store Diesel in it.

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11. Glow plug relay

• It is used to supply the current to the glow plug

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12. Glow plug

• Glow plugs are used to raise the temperature in
  the combustion chambers to enable the engine to
  be started in low temperatures. The glow plugs
  can also be used during cold running to reduce
  harmful exhaust emissions, blue smoke and
  knocking.
• 1. Terminal
• 2. Insulator
• 3. Casing
• 4. Element seal
• 5. Heater and control coils
• 6. Glow tube
• 7. Powder

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13. Glow plug warning lamp

• This is just to tell you that the glow plugs are
  heating up in readiness for a cold start. You
  should wait for the light to extinguish before
  starting the engine.

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14. Ignition switch

• Connect electrical circuits in the vehicle

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15.Malfunction indicator lamp (MIL)

• The MIL has illuminated during driving this means
  there is a malfunction trouble code stored in the
  vehicles computer

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16. Mass air flow (MAF) sensor

• It is fitted between the air filter and intake
  manifold, the task of the air-mass flow meter is
  to measure the fresh air mass supplied to the
  engine, this fresh air mass is used to calculate
  the exhaust gas recirculation rate and the
  permissible injection quantity

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17. Vehicle speed sensor (VSS)

• Measure the speed of the vehicle and send
  information to ECU.
• Speedometer
• Power train Control Module (PCM)

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