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Theoretical presentation


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Theoretical presentation

  1. 1. Electronic Diesel Control RUFO Project Fuel Injection Systems Palestine Polytechnic University An-Najah National University Eng. Fu’ad Daoud Theoretical Part
  2. 2. Introduction <ul><li>This presentation is prepared for educational purposes as a part of the RUFO project “ Fuel Injection Systems ”. </li></ul><ul><li>The aim of this project is to give learners easy access to the knowledge of modern fuel injection systems using “ Blended E-Learning ”. </li></ul><ul><li>This is a joint project between Palestine Polytechnic University and Al-Najah National University. </li></ul><ul><li>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 . </li></ul>02/21/11
  3. 3. Content 02/21/11 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.
  4. 4. Objectives <ul><li>To explain the fundamentals of EDC. </li></ul><ul><li>To show the fuel delivery system operation. </li></ul><ul><li>To describe the function of the system components. </li></ul><ul><li>To explain the function and operation of VE-EDC pump. </li></ul>02/21/11
  5. 5. Electronic Diesel Control (EDC) <ul><li>System Overview </li></ul><ul><li>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. </li></ul>02/21/11
  6. 6. Bosch VE with EDC <ul><li>1. Accelerator position (APP) sensor </li></ul><ul><li>2. Battery </li></ul><ul><li>3. Crankshaft position (CKP) sensor </li></ul><ul><li>4. EDC control unit </li></ul><ul><li>5. Engine coolant temperature (ECT) sensor </li></ul><ul><li>6. Exhaust gas recirculation (EGR) solenoid </li></ul><ul><li>7. Fuel filter </li></ul><ul><li>8. Fuel injection pump </li></ul><ul><li>9. Fuel injector (with needle lift sensor) </li></ul><ul><li>10. Fuel tank </li></ul><ul><li>11. Glow plug relay </li></ul><ul><li>12. Glow plug </li></ul><ul><li>13. Glow plug warning lamp </li></ul><ul><li>14. Ignition switch </li></ul><ul><li>15. Malfunction indicator lamp (MIL) </li></ul><ul><li>16. Mass air flow (MAF) sensor </li></ul><ul><li>17. Vehicle speed sensor (VSS) </li></ul>02/21/11
  7. 7. 1) Accelerator position (APP) sensor <ul><li>The APP sensor can comprise of a potentiometer, signals from the APP sensor are used by the ECM to determine the exact accelerator position. </li></ul><ul><li>1. Potentiometer and idle/full load switch </li></ul><ul><li>2. Spring </li></ul><ul><li>3. Shaft </li></ul>02/21/11 Previous page
  8. 8. 2) Battery <ul><li>Source of energy to the system </li></ul>02/21/11 Previous page
  9. 9. 3) Crankshaft position (CKP) sensor <ul><li>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). </li></ul><ul><li>1. Soft iron core </li></ul><ul><li>2. Field winding </li></ul><ul><li>3. Permanent magnet </li></ul><ul><li>4. Flywheel ring gear </li></ul><ul><li>5. TDC pin </li></ul>02/21/11 Previous page
  10. 10. 4) EDC control unit <ul><li>The EDC control unit assumes the following tasks:- </li></ul><ul><li>Regulate Injection quantity by sending control signals to the quantity adjuster. </li></ul><ul><li>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. </li></ul><ul><li>Regulate charge pressure and exhaust gas recirculation. </li></ul><ul><li>Controlling the glow plug system and the auxiliary heater. </li></ul><ul><li>Controlling the cruise control system. </li></ul>02/21/11 Previous page
  11. 11. 5) Engine coolant temperature (ECT) sensor <ul><li>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. </li></ul><ul><li>1. Electrical connections </li></ul><ul><li>2. Housing </li></ul><ul><li>3. NTC resistor </li></ul>02/21/11 Previous page
  12. 12. 6) Exhaust gas recirculation (EGR) solenoid <ul><li>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. </li></ul>02/21/11 Previous page
  13. 13. 7) Fuel filter <ul><li>It is used to eliminate water and dirty from diesel </li></ul>02/21/11 Previous page
  14. 14. 8) Fuel injection pump <ul><li>EDC pump, is used to pump the fuel throughout the system </li></ul><ul><li>1. Potentiometer for </li></ul><ul><li>control-collar position </li></ul><ul><li>2. Quantity adjuster </li></ul><ul><li>3. Electric cut-off valve </li></ul><ul><li>4. Plunger </li></ul><ul><li>5. Solenoid valve </li></ul><ul><li>for start of injection </li></ul><ul><li>6. Control Collar </li></ul><ul><li>7. Timing device </li></ul>02/21/11 Previous page
  15. 15. 9) Fuel injector (with needle lift sensor) <ul><li>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. </li></ul><ul><li>1. Setting pin </li></ul><ul><li>2. Sensor winding </li></ul><ul><li>3. Pressure pin </li></ul><ul><li>4. Electrical connector </li></ul>02/21/11 Previous page
  16. 16. 10. Fuel tank <ul><li>It is used to store Diesel in it. </li></ul>02/21/11 Previous page
  17. 17. 11. Glow plug relay <ul><li>It is used to supply the current to the glow plug </li></ul>02/21/11 Previous page
  18. 18. 12. Glow plug <ul><li>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. </li></ul><ul><li>1. Terminal </li></ul><ul><li>2. Insulator </li></ul><ul><li>3. Casing </li></ul><ul><li>4. Element seal </li></ul><ul><li>5. Heater and control coils </li></ul><ul><li>6. Glow tube </li></ul><ul><li>7. Powder </li></ul>02/21/11 Previous page
  19. 19. 13. Glow plug warning lamp <ul><li>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. </li></ul>02/21/11 Previous page
  20. 20. 14. Ignition switch <ul><li>Connect electrical circuits in the vehicle </li></ul>02/21/11 Previous page
  21. 21. 15.Malfunction indicator lamp (MIL) <ul><li>The MIL has illuminated during driving this means there is a malfunction trouble code stored in the vehicles computer </li></ul>02/21/11 Previous page
  22. 22. 16. Mass air flow (MAF) sensor <ul><li>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 </li></ul>02/21/11 Previous page
  23. 23. 17. Vehicle speed sensor (VSS) <ul><li>Measure the speed of the vehicle and send information to ECU. </li></ul><ul><li>Speedometer </li></ul><ul><li>Power train Control Module (PCM) </li></ul>02/21/11 Previous page