Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Engine Management System


Published on

Quality and best engine provides better performance and boost our engines (vehicle's) efficiency. So it is better to follow a good engine management system.

Published in: Automotive
  • Login to see the comments

Engine Management System

  1. 1. INTRODUCTION EMS is a type of electronic control unit that controls the running of an engine by monitoring the engine speed and ensure optimal engine performance . It also measures the exact quantity of fuel required to start a engine.
  2. 2. Resource :
  3. 3. Resource :
  4. 4. Why Cars Need an EMS •It is required for manage the power train. •Also it helps to maintain proper coordination within engine’s ignition system, fuel injection system and emission control.
  5. 5. Key Points of EMS Electronic Fuel Injection System Air Induction System/Control Fuel Delivery System/Control Electronic Control System Electronic control unit Fuel Injector sequential Air flow sensor Air temperature sensor Throttle Position sensor (TPS) Continue…..
  6. 6. Temperature sensor Oxygen sensor Idle air control valve(IACV) MAP sensor Knock Sensor Engine Speed Sensor Engine Oil Sensor Crankshaft sensor Camshaft Sensor and Multi-point fuel injection
  7. 7. Electronic Fuel Injection System Determine the amount of fuel to inject into the engine and when to fire the spark plugs.  Achieve the most horsepower with the least amount of Fuel Resource :
  8. 8. Electronic Fuel Injection System Filter and measure the air flow into the engine
  9. 9. Fuel Delivery System/Control It helps to measure; • Fuel Efficiency. Emission Performance Engine Tuning and many more.
  10. 10. Electronic Control System It helps to inject the correct amount of fuel at correct time and speed
  11. 11. Electronic Control Unit • It controls more than one electric systems and sub-systems in a motor vehicle. • It helps in regulating and maintaining the amount of fuel and air the engine needs to increase horsepower.
  12. 12. Fuel Injector Sequential It’s a type of multi-port injection system in which injection valve will open just before the cylinder intake valve opens. It has the fast response time when the driver makes a quick change.
  13. 13. Air flow sensor An air flow meter is a device that measures the actual speed of the air flowing through the engine in different segments.
  14. 14. Air temperature sensor It helps to measure the air density for fuel mixture control and to trim the air flow ratio according to the airflow density.
  15. 15. Throttle Position sensor This sensor is used to monitor the throttle position of a car . •This sensor moves with the throttle and sends a voltage signal to the computer indicating throttle angle and speed of movement. The computer uses this data to measure engine load, adjust timing, fuel delivery etc.
  16. 16. Temperature sensor Temperature sensors include analog and digital sensor ICs designed for temperature monitoring of a system
  17. 17. Oxygen sensor It measures the proportion of oxygen to fuel in the engine.
  18. 18. Idle air control valve(IACV) •The idle air control valve is also known as idle speed control valve; regulates the idle speed of the engine
  19. 19. MAP sensor This sensor measures air pressure which tells engine the current altitude of a vehicle
  20. 20. Knock Sensor The Knock Sensor detects engine knock and sends a voltage signal to the engine and the engine uses that signal to control the timing .
  21. 21. Engine Speed Sensor An engine speed sensor is attached to crankshaft of car's engine and it indicate the speed that crankshaft is spinning. This information is beneficial to control both the ignition timing and EMS.
  22. 22. Engine Oil Sensor It measures the oil pressure inside the engine and gives an alert in case of any problem with oil pressure.
  23. 23. Crankshaft sensor It is used to monitor the position and rotational speed of crankshaft and these information will be used by the EMS to control the ignition system timing and other engine parameters.
  24. 24. Camshaft Sensor The Camshaft sensor determines which cylinder is firing to establish injector synchronization and coil firing sequence in DIS systems then only crankshaft sensor set ignition timing, supply the signal and measure the speed.
  25. 25. Multi-point fuel injection In this system each cylinder has number of injectors to supply/spray fuel in the cylinders as compared to one injector located centrally to supply/spray fuel in case of single point injection system. Resource :
  26. 26. THANK YOU Source: