Fuel and Ignition Systems
The automotive fuel system is designed to provide the correct amount of fuel and air to the engine under all operating conditions and power demands. Many vehicles today use a fuel injection system (replacing the carburetor in older vehicles) to deliver the fuel under pressure into the combustion chambers or into the air flow just as it enters each individual cylinder. This maximizes power and economy. The fuel system includes:
- Fuel tank- holds the fuel and fuel gauge.
- Fuel lines- tubes that connect the tank to the carburetor or injection system.
- Carburetor or fuel injector- controlled by the gas pedal, this piece supplies the fuel to the engine with the correct mix of air.
- Fuel filter- removes dirt and other contaminants from the fuel.
- Fuel pump- pushes fuel through the lines from the tank to the carburetor.
- Air filter- ensures clean air enters the engine with the fuel.
- Choke- restricts air flow and increases idle speed (when cold).
- Turbo- increases the air entering the cylinders.
The Ignition System- draws energy from the battery to create high voltage surges to set off combustion in the engines cylinders.