Publish Time: 2025-11-19 Origin: Site
A fuel injector consists of a valve body, nozzle, needle valve, filter screen, spring, and an electrical connector. The valve body regulates fuel pressure, while the nozzle atomises the fuel into fine droplets that enter the cylinder, delivering efficient combustion and higher engine power.
• Function: Returns uninjected fuel from the top of the injector back to the fuel tank, keeping system pressure stable and preventing tank overpressurisation.
• Technical Features: Stainlesssteel inner tube with a composite outer sheath, rated up to 150 bar and operating between –40 °C and 150 °C, ensuring smooth fuel return.
Engine Fuel Return Overflow Leak Off Pipe OE 93198547 82008944668 4455883
• Advantages: Excellent oil resistance, hightemperature tolerance up to 200 °C, and flexibility for complex routing in the engine bay.
• Typical Uses: Intake and turbocharger cooling loops, extensions of the leakoff pipe in highheat zones, and direct fuel delivery to the cylinder head.
• Fast Assembly: Pushpull latch eliminates torquewrench tightening, reducing assembly time from 1015 minutes to 30 seconds and avoiding uneventorque leaks.
• Sealing Reliability: Made of highstrength polymer or stainless steel with an Oring, providing 100 % leakproof performance even at 150 bar.
5. System Integration Guidelines
| Critical Component | Selection Criteria | Recommended Material / Specification |
|---|---|---|
Fuel Injector | Highpressure atomisation, electronic control | Aluminumalloy valve body, precisionmachined nozzle |
Leakoff Pipe | Pressurerated, temperaturerated, smooth return flow | Stainlesssteel inner tube + composite outer sheath |
Silicone Hose | Hightemperature, oilresistant, flexible | Silicone (200 °C rating) |
QuickConnect Coupler | Leakproof, rapid installation | Highstrength polymer or stainless steel with Oring |
6. System Flow
Fuel pump → Fuel return pipe → Highpressure common rail
Highpressure common rail →common rail fuel Injector (with quickconnect coupler)
fuel Injector → Silicone hose → Cylinder
System Diagram ：
7. Key Benefits
• Higher Engine Power: Highpressure, uniform atomisation combined with lowleak leakoff pipe can raise peak power by 5-7 %.
• Reduced Fuel Consumption: Optimised return flow can cut fuel use by 3-5 %.
• Extended Vehicle Life: Leakproof quickconnect couplers lower maintenance frequency, improving overall system reliability by 20-30 %.
If you are interested in any of the above components or need a complete fuelinjection system that complies with SAE J200/CA510/AII 510 standards, please contact us for technical data, quotations, or samples.
• Email: sales@stdrubberhose.com
• Phone: +86 15373831907
• Online Form: Visit https://www.stdrubberhose.com/contact.html and submit your requirements; we will reply within 24 hours.