A2740700501
BOSCH A2740700501 طلمبة بنزين ضغط عالي مرسيدس C300 E300 GLC300 2.0T M274
2740700501, A2740700401, 0261520215, 0261520216Integrated Solenoid Quantity Control Valve (Flow Metering)-200 barتوافق المركبات والمحركات
| المركبة | المحرك | سنوات الصنع |
|---|---|---|
| Mercedes-Benz C300 W205 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2015-2021 |
| Mercedes-Benz E300 W213 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2017-2020 |
| Mercedes-Benz GLC300 X253 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2016-2020 |
المواصفات الفنية
| المواصفة | القيمة |
|---|---|
| نوع النظام | Camshaft-Driven Single-Piston High-Pressure Fuel Pump (HPFP) |
| ضغط التشغيلمواصفة أساسية | |
| Drive Mechanism | Three-lobe exhaust camshaft actuation with roller tappet bucket |
| Flange Mounting Bolt Torque | 12 N·m (tighten evenly in cross-pattern to prevent housing tilt) |
| High Pressure Line Torque | 27 N·m (high pressure steel flare nut connection) |
| Flow Control Valve Resistanceمواصفة أساسية | |
| أكواد الأعطال الشائعة | P0087 (Fuel Rail Pressure Too Low), P0088 (Fuel Rail Pressure Too High), P0016 (Camshaft Correlation) |
| Workshop Precaution | Inspect roller tappet for wear prior to installation; check engine oil for gasoline dilution odor |
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": "Relieve Fuel Line Residual Pressure & Disconnect Battery",
- "instruction": "Disconnect negative battery lead. De-pressurize low-pressure fuel circuit and cover HPFP with shop towels to catch fuel discharge during line disconnection."
- },
- {
- "step": 2,
- "title": "Remove Acoustic Cover & Detach Fuel Flow Control Plug",
- "instruction": "Unclip sound deadening foam around pump housing. Disconnect electrical connector from integrated fuel volume metering solenoid."
- },
- {
- "step": 3,
- "title": "Inspect Camshaft Roller Tappet & Fit New Viton O-Ring",
- "instruction": "Evenly loosen dual flange mounting bolts half-turn at a time. Withdraw HPFP and remove roller tappet. Inspect tappet surface for scuffing and lubricate with fresh engine oil."
- },
- {
- "step": 4,
- "title": "Install HPFP, Torque Mounting Bolts & Reconnect Lines",
- "instruction": "Position HPFP onto cylinder head. Alternately tighten mounting bolts to 12 N·m. Torque high pressure outlet flare nut to 27 N·m. Start engine and verify zero fuel weepage."
- }
- ]
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.