20R-5079 CAT Reman Common Rail Injector – Extended Flow Capacity for C13/C15/C18 Acert High‑Output Engines | Direct Core‑Exchange Replacement
1. Product:20R-5079
2. Compatible Equipment: Diesel Fuel Injection Systems
3. Manufacturer: Aftermarket OEM Replacement
4. Condition: Brand New, Fully Tested
5. Origin: ABOSEDE Diesel
6. Shipping period: 3-5 business days
7. Payment terms: T/T, Western Union, PayPal
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Product Introduction
Most remanufactured injectors aim to restore original performance-but what if the original performance was already near the limit of the fuel system? In high‑output Acert engines, particularly those used in heavy‑haulage mining trucks, high‑horsepower generator sets, and performance‑tuned on‑highway fleets, the standard injector flow often runs at 90‑95% duty cycle at peak load. This leaves little margin for fuel density variations, filter restriction, or altitude effects-and it accelerates wear on the plunger and nozzle due to sustained high‑pressure operation. The 20R‑5079 remanufactured injector addresses this with an extended flow capacity-approximately 8‑10% higher than the standard 20R‑5074 baseline. This is achieved not by increasing rail pressure (which remains at 2,000 bar), but by using a modified plunger geometry with a slightly larger effective displacement, paired with a high‑flow nozzle that reduces the pressure drop across the orifices. The result is the same injection duration as standard injectors but with a larger fuel mass delivered-meaning the ECU does not need to extend pulse widths into the less linear region of the injector's operating curve. For high‑output engines, this translates to sustained power delivery, cooler EGTs, and extended injector life, even under continuous heavy loading.
📊 Technical Data – Extended Flow Parameters
| Parameter | Specification |
|---|---|
| Part Number | 20R‑5079 (Caterpillar Reman) |
| Technology | Solenoid‑actuated common‑rail, extended displacement |
| Maximum Rail Pressure | 2,000 bar (29,000 psi) |
| Nozzle Type | VCO (Valve Covered Orifice) – 8 × ø0.195 mm orifices (oversized) |
| Spray Cone Angle | 150° (±1.5°) – matched to high‑output bowl |
| Needle Lift | 0.32 mm (extended versus 0.30 mm standard) |
| Solenoid Resistance (pull‑in) | 0.85 – 1.0 Ω @ 20°C (new coil) |
| Hold Current | 5.0 – 6.0 A (PWM controlled) |
| Dynamic Flow Rate | 640 – 680 cc/min @ 100 bar test pressure |
| Flow Increase vs Standard | +8‑10% (vs 20R‑5074 baseline) |
| Opening Delay (after reman) | ≤ 155 µs (optimised for high flow) |
| Internal Leakage (after reman) | ≤ 6.0 cc/min at idle |
| Connector | 2‑pin Deutsch, gold‑plated (new) |
⚙️ Extended Flow – How It Achieves More Fuel Without Higher Pressure
The 20R‑5079's increased flow comes from two complementary modifications:
Larger plunger displacement – The plunger diameter is increased by 0.2 mm compared to the standard 20R‑5074, while maintaining the same stroke length. This increases the swept volume by approximately 9%, translating to more fuel delivered per injection event at the same rail pressure and pulse width.
Oversized nozzle orifices – The standard 0.18 mm orifices are enlarged to 0.195 mm. This reduces the flow restriction at the nozzle, allowing more fuel to pass for a given needle lift. Combined with the larger plunger, this ensures that the injector can deliver high fuel masses without requiring the ECU to extend pulse widths-a key advantage because operating an injector beyond 2.0 ms pulse width enters a region where the flow‑vs‑time relationship becomes less linear, making accurate metering more difficult.
Benefit in practice : At peak load, a standard injector might require a 2.2 ms pulse width to deliver the required fuel mass. The 20R‑5079 can deliver the same mass in approximately 2.0 ms, staying within the linear range of the injector's response curve. This improves fuel metering accuracy, reduces smoke during hard acceleration, and keeps the injector's solenoid cooler due to shorter duty cycles.