Automotive Fuel Tank System
Structure and Functional Components
1. Core Fuel Storage Chamber
- The main body is a sealed fuel storage chamber with shape adapted to equipment installation space
- Common shapes include rectangular or cylindrical designs
- Constructed from corrosion-resistant metal or high-strength engineering plastic
- Designed to withstand long-term fuel immersion and certain pressure levels
- Features smooth inner walls with reinforcement ribs for structural stability
- Slightly inclined bottom facilitates fuel collection and reduces residue
2. Key Functional Components
- Fuel pump assembly located near the fuel outlet
- Consists of pump, motor, and filter for fuel transportation
- Filter prevents impurities from entering the engine
- Float-type fuel level sensor transmits fuel level signals to external gauge
- Some tanks include baffles to reduce fuel sloshing noise and impact
3. Necessary Safety Features
- Internal ventilation structure connected to external vent with filter
- Maintains pressure balance inside and outside the tank
- Prevents negative pressure during refueling or fuel consumption
- Some tanks feature drain plugs for removing accumulated moisture and impurities
- Metal tanks have anti-corrosion coatings; plastic tanks use material properties to resist fuel corrosion
4. Auxiliary Connections and Sealing Components
- Fuel filler pipe connection at top or side with sealing rubber ring
- Fuel outlet at bottom or lower side with seal for leak-free transfer
- Designated inspection port with sealing cap for maintenance access
- Multi-layered sealing design ensures complete seal between cap and chamber