8-98011604-1 Common Rail Injector For Isuzu 4JJ1 Denso Fuel Injector Replacement
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Common rail injectors for Isuzu 4JJ1 engines
I. Basic Information
Compatible engine: Isuzu 4JJ1-TC/4JJ1-TCX (2.8L/3.0L in-line 4-cylinder diesel engine)
Applied vehicle models
Passenger car models: Isuzu D-MAX pickup truck, MU-X Mu-Youxia;
Commercial/Construction machinery: Isuzu NQR light truck, Hitachi ZX130 excavator, Sumitomo SH130 loader;
Core supplier: DENSO, original factory part number such as 8-98011604-1
Ii. Structure and Technical Parameters
| Core component | Technical features |
|---|---|
| Fuel injector | Piezoelectric crystal/electromagnetic control, with a spray pressure up to 1800bar, enabling multi-stage spraying (pre-spraying/main spraying/post-spraying) |
| Oil nozzle hole | With a precise 6-8 hole design, the fuel atomization particle size is less than 50μm, ensuring complete combustion |
| Control module | The integrated solenoid valve and flow metering unit can adjust the fuel injection volume and injection timing in real time |
| Material | The fuel injectors are made of wear-resistant alloy and are suitable for the high-pressure and highly corrosive working conditions of diesel engines |
Iii. Functions and Advantages
Precise fuel control
Through the high-pressure injection of the common rail system, "on-demand fuel injection" is achieved, which improves the fuel economy of the 4JJ1 engine by 10% to 15%.
Emission optimization
The multi-stage injection design reduces the emissions of nitrogen oxides (NOx) and particulate matter (PM), meeting the Euro V/National VI regulations.
Power compatibility
Match the low-speed torque characteristics (peak torque 430N · m) of the 4JJ1 engine to ensure power response under high-load conditions.
Iv. Key Points for Use and Maintenance
Fuel requirements
Low-sulfur diesel that meets the National VI standards must be used to prevent impurities from clogging the fuel injectors (it is recommended to replace the fuel filter every 20,000 kilometers).
Calibration requirements
After replacement, professional diagnostic equipment (such as Isuzu IDSS) should be used for fuel injector code matching; otherwise, problems such as insufficient power and increased fuel consumption may occur.
Lifespan
Under normal working conditions, the service life is ≥ 80,000 kilometers. If idle vibration and power decline occur, the atomization effect of the fuel injector needs to be checked.
V. Core Values
As the "fuel heart" of the 4JJ1 engine, this fuel injector directly determines the engine's power, fuel consumption and emission performance, and is one of the key components to ensure the reliability of the entire machine.
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