Fuel Injection
Working of cars fuel injection
Helpful Information
The quantity of fuel that enters the engine is determined by the engine management system while using feedback data which is gathered by various sensors. Oxygen sensors are used to monitor the fuel mixture in the exhaust system. A fuel injector can designed to enter the intake system or the combustion chamber of the engine. The open duration of an injector is called, pulse width.
Once an engine runability problem has materialized, its usually accompanied by a check engine or service engine soon light. Perform acode read or scan to determine the problem, and the subsequent repair needed to fix the problem. A fuel system can hold pressure for several hours so caution should be used when working on these systems.
Best Practices
Once an engine runability problem has materialized, its usually accompanied by a check engine or service engine soon light. Perform acode read or scan to determine the problem, and the subsequent repair needed to fix the problem. A fuel system can hold pressure for several hours so caution should be used when working on these systems.
- Service throttle body and idle speed control motor with tune up.
- Install injector cleaner periodically.
Step by step illustrated explanation of an automotive fuel injection system.
Step 1 - Fuel injection is used to supply an internal combustion engine with the proper amount of fuel at any given engine speed. Once fuel enters the fuel tank its picked up by the fuel pump which is situated inside the gas tank. This fuel pump is controlled by a relay located in thePDC power distribution center which is activated by the computer.
Fuel Pump In-Tank
Step 2 - Once pressurized, the fuel travels along the bottom of the vehicle through fuel lines toward the fuel filter.
Fuel Lines
Step 3 - Fuel then travels to the fuel filter where its cleaned before continuing to the injection rail.
Fuel Filter
Step 4 - After being cleansed by the fuel filter, pressurized fuel enters the fuel rail where its distributed to individual injectors.
Fuel Rail
Step 5 - A fuel pressure regulator is used to maintain and adjust pressure while the engine is in use, this device is only used in fuel return style injection systems. Some fuel injected vehicles are fitted with a regulator at the fuel pump.
Fuel Pump In-Tank
Fuel Lines
Step 3 - Fuel then travels to the fuel filter where its cleaned before continuing to the injection rail.
Fuel Filter
Fuel Rail
Fuel Pressure Regulator
Fuel Injector
Computer
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