Automotive Tech 🏎

Automotive Tech 🏎: INJECTION SYSTEM “ Fuel injector is an electronically controlled mechanical device that is responsible for spraying (injecting) the right amount of fuel at a right time into the engine so that a suitable air/fuel mixture is created for optimal combustion.” The technology was created in the early 20th century and implemented on diesel engines first. By the final third of the 20th century, it had also become popular among regular gasoline engines. The electronic control unit (ECU at engine management system) determines the precise amount and specific timing of required gasoline (petrol) dose for every cycle, by collecting information from various engine sensors. So, the ECU sends a command electrical signal of the correct duration and timing to the fuel injector coil. In that way opens the injector and allows petrol to pass through it into the engine. The one terminal of the injector coil is directly supplied by 12 volts which are controlled by the ECU, and the other terminal of the injector coil is open. When ECU determined the exact amount of fuel and when to inject it, activates the appropriate injector by switching the other terminal to the ground (mass, i.e. negative pole). COMPONENTS The objectives of the fuel injection system are to meter, atomize and distribute the fuel throughout the air mass in the cylinder. At the same time, it must maintain the required air-fuel ratio as per the load and speed demand on the engine. 1. Pumping elements: To move the fuel from the fuel tank to the cylinder. 2. Metering elements: To measure the supply of the fuel at the rate demanded by speed and load conditioning on the engine 3. Metering control: To adjust the rate of the metering elements for change in load and speed of the engine. 4. Mixture control: To adjust the ratio of the fuel and air as demanded by the load and speed. 5. Distributing elements: To divide the metered fuel equally among the cylinder.፧ 6. Timing control: To fix the start and stop of the fuel-air mixing process.

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