1. بسم الله الرحمن الرحيم

3. Project Items Abstract. Abstract. Introduction. Introduction. Programmable ECUs. Programmable ECUs. Step of ECU function. Step of ECU function. Subsystems of ECU. Subsystems of ECU.

4. Abstract OBJECTIVES OF THE Presentation: OBJECTIVES OF THE Presentation:  To know what is the electronic control unit.  To determine the primary functions of (ECU).  How does the ECU work.

5. Introduction  Electronic control unit (ECU) is a computer which controls (for instance) ignition and fuel injection systems. An electronic control unit (ECU), also called a control unit or control module that controls one or more of the electrical subsystems in a car. An electronic control unit (ECU), also called a control unit or control module that controls one or more of the electrical subsystems in a car. Some modern cars have up to 70 ECUs. Some modern cars have up to 70 ECUs.

6. Subsystems of ECU Engine Control Unit also called Power train Control Module (PCM). Engine Control Unit also called Power train Control Module (PCM). Transmission Control Unit – TCU. Transmission Control Unit – TCU. Telephone Control Unit - TCU. Telephone Control Unit - TCU. Door Control unit. Door Control unit. ECU operation Seat Control Unit. ECU operation Seat Control Unit. Climate Control Unit. Climate Control Unit.

8. The steps of ECU function Gathering data, sent by sensors. Gathering data, sent by sensors. Filtering this data, This operation is handled by data conditioners. Filtering this data, This operation is handled by data conditioners. Data processing and analysis by the ECU’s digital core by Special algorithms calculate the commands to be sent to the control devices. Data processing and analysis by the ECU’s digital core by Special algorithms calculate the commands to be sent to the control devices. Formatting of operating commands, and amplifying them if needed. Formatting of operating commands, and amplifying them if needed.

10. Engine control unit Is an electronic control unit which controls various aspects of an (ICE) operation. Is an electronic control unit which controls various aspects of an (ICE) operation. The simplest ECUs control only the quantity of fuel injected into each cylinder each engine cycle. The simplest ECUs control only the quantity of fuel injected into each cylinder each engine cycle. More advanced ECUs found on most modern cars also control the ignition timing, variable valve timing (VVT). More advanced ECUs found on most modern cars also control the ignition timing, variable valve timing (VVT).

11. Electronic control units

12. OPERATIONS OF ENGINE CONTROL UNIT

13. Control of fuel injection ECU will determine the quantity of fuel to inject based on a number of parameters. ECU will determine the quantity of fuel to inject based on a number of parameters. The ECU will inject more fuel according to how much air is passing into the engine which is controled by throttle pedal. The ECU will inject more fuel according to how much air is passing into the engine which is controled by throttle pedal. If the engine has not warmed up yet,the ECU will control the injection of fuel causing the engine to run slightly 'rich' until the engine warms up (choke). If the engine has not warmed up yet,the ECU will control the injection of fuel causing the engine to run slightly 'rich' until the engine warms up (choke).

15. Control of ignition timing ECU can adjust the exact timing of the spark (called ignition timing) to provide better power and economy. ECU can adjust the exact timing of the spark (called ignition timing) to provide better power and economy. If the ECU detects knock because the ignition timing is too early in the compression stroke, the ECU will delay the timing of the spark to prevent knock. If the ECU detects knock because the ignition timing is too early in the compression stroke, the ECU will delay the timing of the spark to prevent knock.

16. Control of variable valve timing the ECU controls the time in the engine cycle at which the valves open. the ECU controls the time in the engine cycle at which the valves open. The valves are usually opened later at higher speed than at lower speed,This can optimize the flow of air into the cylinder increasing power. The valves are usually opened later at higher speed than at lower speed,This can optimize the flow of air into the cylinder increasing power.

18. Programmable ECUs A special category of ECUs are those which are programmable. These units do not have a fixed behavior, but can be reprogrammed by the user. A special category of ECUs are those which are programmable. These units do not have a fixed behavior, but can be reprogrammed by the user. A programmable ECU can be wired in by a laptop connected using a serial or USB cable, while the engine is running to add the new configurations. A programmable ECU can be wired in by a laptop connected using a serial or USB cable, while the engine is running to add the new configurations.

19. parameters that can be reProgrammed Ignition. Revolution limit. Water temperature correction. Transient fueling. Variable cam timing. Gear control.

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