PY8W-13-250
DENSO PY8W-13-250 بخاخ وقود عالي الضغط Mazda CX-9 CX-5 2.5L Turbo
PY01-13-250A, 297500-1120High-Speed Solenoid Actuated Multi-Hole Nozzle-200 barالمواصفات الفنية
| المواصفة | القيمة |
|---|---|
| نوع النظام | Denso Multi-Hole Direct Gasoline Fuel Injector |
| ضغط التشغيلمواصفة أساسية | |
| Spray Pattern | Multi-hole asymmetrical fan pattern optimized for high compression ratio |
| Fuel Rail Bolt Torque | 10 N·m (holding bracket flanged fasteners) |
| High Pressure Pipe Torque | 25 N·m Flare Nut Connection |
| Coil Resistance | 1.8 - 2.2 Ω at 20°C (High performance peak-and-hold drive) |
| أكواد الأعطال الشائعة | P0300 (Random Misfire), P0301-P0304 (Cylinder Misfire), P0171 (System Too Lean Bank 1) |
| Workshop Precaution | Replace Teflon combustion chamber seal ring and sizing collar prior to cylinder head installation |
مضخة وقود الضغط العالي المتوافقة (مجموعة دائرة الوقود)
تعمل على نفس دائرة الضغط العالي بنظام القضيب المشترك. عند تشخيص انخفاض الضغط (P0087)، تحقق من تدفق المضخة قبل استبدال الحاقنات.
إرشادات التركيب
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Remove Intercooler Charge Piping",
- "instruction": "Depressurize fuel injection system via fuel pump fuse pull. Remove top-mount intercooler and intake charge tubes to access the center fuel rail."
- },
- {
- "step": 2,
- "title": "Disconnect Direct Injector Harness & Fuel Rail Lines",
- "instruction": "Unplug injector electrical connectors. Disconnect high pressure steel fuel rail line (25 N·m) and unbolt fuel rail mounting bolts (10 N·m)."
- },
- {
- "step": 3,
- "title": "Extract Injectors & Fit New Teflon Chamber Seals",
- "instruction": "Carefully remove injectors with puller tool. Fit new Teflon chamber seals using the installation mandrel and compression die."
- },
- {
- "step": 4,
- "title": "Torque Rail Fasteners & Verify Pressure Integrity",
- "instruction": "Press injectors into cylinder head. Tighten rail bolts to 10 N·m. Torque steel high pressure line to 25 N·m. Start engine and verify zero fuel leakage."
- }
- ]
رموز الاعطال التشخيصية (DTC) وبروتوكولات الفحص
رموز اعطال التشخيص الشائعة (DTC) التي يتم تسجيلها عند تآكل حاقن الديزل أو حدوث خلل كهربائي:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
بروتوكولات التشخيص والخدمة الفنية
إجراءات ورشة العمل المعتمدة، وحدود الاختبار التشخيصية، ومعايير الخدمة لهذا المكون.