Where is the car fuel pump installed?

[IsabelLee]

Fuel pumps are divided into gasoline pumps and oil pumps. The gasoline pump is installed inside the fuel tank, while the oil pump is installed inside the engine. The function of the gasoline pump is to draw gasoline from the fuel tank and deliver it through pipelines and fuel filters to the float chamber of the carburetor. It is precisely because of the gasoline pump that the fuel tank can be placed at the rear of the car, far from the engine, and below the engine. The working principle of the gasoline pump is as follows: 1. Currently, in most vehicle models, the fuel pump is installed inside the car's fuel tank and is electrically driven. The fuel pump consists of three parts: the pump body, the permanent magnet motor, and the housing. When the permanent magnet motor is powered, it drives the pump body to rotate, sucking fuel from the inlet, passing it through the internal structure of the electric fuel pump, and then pressing it out from the outlet to supply the fuel system. The fuel flowing through the electric fuel pump also cools the armature of the permanent magnet motor, hence it is also known as a wet fuel pump. 2. The motor part of the electric fuel pump includes a permanent magnet fixed on the housing, an armature that generates electromagnetic torque, and a brush device installed on the housing. The brushes are in contact with the commutator on the armature, and their leads are connected to the terminals on the housing, directing the voltage that controls the electric fuel pump to the armature windings. The ends of the electric fuel pump housing are crimped and riveted, assembling all components into a non-detachable unit.

[VanEmmanuel]

Through my extensive experience in driving and car repairs, I've noticed that the fuel pump in most modern vehicles is located inside the fuel tank, typically secured at the bottom or side. This design effectively reduces noise, benefits from better cooling by being submerged in fuel, and prevents overheating damage under high temperatures. If placed externally, such as near the engine compartment, it's prone to heat accumulation, which can cause issues, and may also be exposed to air, increasing the risk of fuel leaks. Replacing the pump requires caution—I've personally experienced how hidden it is, often requiring the tank to be opened for access, which adds to the repair difficulty. Therefore, regular maintenance should include checking for any abnormal sounds from the fuel pump. Considering fuel supply efficiency, the right placement ensures smooth engine operation and extends the pump's lifespan. Additionally, the installation location varies with the vehicle model; some older or specially designed cars might have the pump outside the tank, but most improvements prioritize internal placement to enhance overall safety and noise reduction.

[DelJack]

As an ordinary car owner, I've experienced the frustration of a fuel pump failure. At that time, the car suddenly stalled, and the mechanic found the pump was located inside the fuel tank, deeply submerged in gasoline. The placement isn't arbitrary: the interior space of the fuel tank isolates the pump from external dust, protecting it from contamination. Later, I self-taught car repairs and learned that if the pump were installed externally, perhaps under the chassis, it would be more prone to collision damage. In daily driving, its concealed location means inspections rely on listening for unusual noises or sensing fuel delivery issues, so I've developed a habit of regularly using high-quality gasoline to prevent clogs. Maintenance is more cumbersome, but the internal placement design reduces fire hazards, benefiting driving safety.

[Hank]

The installation position of the fuel pump impacts safety, which is my primary concern. Inside the fuel tank, being submerged in gasoline reduces the risk of external high temperatures or accidental fires. If placed externally, the exposed position carries higher risks. As a car owner, I emphasize that location selection is crucial: most modern vehicles secure it at the bottom of the tank, ensuring both fuel supply efficiency and safe concealment. When replacing the pump, always have it done by professionals to avoid improper installation leading to fuel leaks. With a reasonable position, maintenance intervals can be extended, preventing frequent malfunctions.