Where does fuel go in your car?

06 Aug.,2024

 

How Do Gasoline Cars Work? - Alternative Fuels Data Center

Battery: The battery provides electricity to start the engine and power vehicle electronics/accessories.

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Electronic control module (ECM): The ECM controls the fuel mixture, ignition timing, and emissions system; monitors the operation of the vehicle; safeguards the engine from abuse; and detects and troubleshoots problems.

Exhaust system: The exhaust system channels the exhaust gases from the engine out through the tailpipe. A three-way catalyst is designed to reduce engine-out emissions within the exhaust system.

Fuel filler: A nozzle from a fuel dispenser attaches to the receptacle on the vehicle to fill the tank.

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How a Car's Fuel System Works

If you want to be technical, it starts at the tank when you remove the gas cap and pump fuel in. From here, both gasoline and diesel fuel are picked up by the fuel pump, where the real action begins.

The vast majority of vehicles today have a fuel pump that resides in the fuel tank itself. If it doesn&#;t, it&#;s located on the frame or subframe, which is far less common. On a standard electronic fuel injected vehicle, which still makes up a vast majority of vehicles on the road, this pump then provides the volume, and pressure of the fuel. Older, carbureted vehicles generally have a suction-style fuel pump that is mounted to the engine, and draws the fuel out of the tank, into the pump, and pressurizes it on its way to the carburetor.

The newest technology for gasoline engines is direct injection, which requires in most cases 2 fuel pumps &#; a &#;lift&#; or &#;transfer&#; pump which pumps fuel up and out of the fuel tank, and then a pressure pump, usually mounted on the frame or subframe of the vehicle, which then provides fuel to the injectors at high pressure. This is very similar to how a Diesel engine works, where the lift pump in the tank supplies fuel usually to a mechanical, high pressure pump mounted on the engine.

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