presentation . group 8 EFI SYSTEM (FOR SI ENGINES).pptx

this presentation will help to understand the EFI system of an SI engine

1. EFI SYSTEM (FOR SI ENGINES)

2. EFI SYSTEM (FOR SI ENGINES) The EFI (Electronic Fuel Injection) system is a type of engine management system used in modern SI (spark ignition) engines. It uses a network of sensors, electronic control units (ECUs), and fuel injectors to deliver the correct amount of fuel and air mixture to the engine.

3. FUNDAMENTALS OF ELECTRONIC IGNITION The 8 fundamentals of electronic ignition are: ECM Sensors Ignition coil Distributor (in older systems) Spark plug Ignition switch Wiring harness Power source

4. ELECTRONIC DISTRIBUTOR WITH MECHANICAL SPARK ADVANCE ELECTRONIC DISTRIBUTOR WITH MECHANICAL SPARK ADVANCE: The mechanical spark advance is  an Ignition Timing control mechanism built into most distributors . The reluctor has the same number of teeth or tips as there are cylinders in the engines. As the distributor shaft and reluctor rotate each tooth creates a voltage pulse in the pickup coil.

5. ELECTRONIC DISTRIBUTOR ELECTRONIC SPARK ADVANCE ; The electronic spark advance system, on the other hand, uses sensors and an electronic control module (ECM) to precisely adjust the ignition timing based on various inputs such as engine load, temperature, and speed. The ECM can make adjustments to the timing in real-time, providing optimal ignition timing under all operating conditions.

6. HIGH ENERGY IGNITION (HEI) SYSTEM The High Energy Ignition (HEI) system is an electronic ignition system used in internal combustion engines. It was introduced by General Motors in the mid-1970s and quickly became a standard feature in many GM vehicles. The HEI system uses a high-output ignition coil and a magnetic pickup located inside the distributor to produce a high-energy spark. The distributor cap contains a rotor that spins and distributes the spark to each spark plug in the correct firing order.