2 Ω Export Style 4-Cylinder Gas Injector Rail for CNG LPG GDI Engine
This is a 2-ohm injector rail for 4-cylinder GDI engines running on CNG or LPG.
Two things set it apart from a standard rail. First, the coil resistance is 2 ohms – that's the spec a lot of GDI systems require. Second, the opening time is 2.0ms, which is quicker than the usual 2.5ms. Faster response matters on direct-injection engines because the injection window is shorter.
It comes as a complete kit – brass outlets, seals, bolts. Everything you need is in the box. No hunting for missing parts.
The diaphragm material is upgraded from standard rails. It handles contaminants better. We don't claim it's bulletproof, but it's more forgiving than the budget options.
Product Introduction
GDI engines are different from port-injection engines. The injectors fire at higher pressure, the timing window is tighter, and the control system expects faster response from the gas components. If the injector rail can't keep up, you get hesitation, rough transitions, or misfire.
This rail was put together with that in mind. The 2.0Ω coil draws enough current to open the valve quickly. The 2.0ms opening time matches the shorter injection windows on GDI applications. It's not a one-size-fits-all part – it's spec'd for systems that need quicker response.
The diaphragm is upgraded too. GDI systems tend to run at higher fuel pressures, which puts more stress on the valve seat and diaphragm. The material we use holds up better under that condition.
It works on most 4-cylinder GDI vehicles being converted to gas – sedans, SUVs, light trucks. New installs or replacing a rail that's been giving trouble.
Product Parameter
|
Item |
Specification |
|
Product Type |
Export wear-resistant high-speed gas injector rail |
|
Applicable Cylinder Number |
4 cylinders |
|
Working Frequency |
0-160HZ |
|
Working Pressure |
0.05-0.2Mpa, Maximum pressure resistance: 0.3Mpa |
|
Working Voltage |
DC 12V ±15% |
|
Coil Resistance |
2.0ohm ±15% |
|
Inlet Diameter |
Φ10mm |
|
Outlet Diameter |
Φ5mm |
|
Working Temperature (LPG) |
-20℃ ~ +120℃ |
|
Working Temperature (CNG) |
-40℃ ~ +120℃ |
|
Opening Response Time |
2.0ms ±5% |
|
Closing Response Time |
1.8ms ±5% |
|
Customization Service |
Support personalized custom production |
Product feature and application
Core Product Features
2.0Ω coil – matches GDI system requirements
Quicker opening time (2.0ms) – keeps up with short injection windows
Upgraded diaphragm – handles higher fuel pressures
CNG and LPG compatible
Complete kit – outlets, seals, bolts included
Custom options for bulk orders
Main Application Scenarios
This rail is meant for 4-cylinder GDI engines converted to CNG or LPG. The quicker response and 2-ohm coil make it a better match for direct-injection applications than standard rails.
If you're converting a GDI vehicle and using a generic rail, you might notice hesitation or rough transitions. This one addresses that. It's also a direct replacement for an existing rail that's not keeping up.
Important: this is high-pressure gas hardware. Installation should be handled by someone with GDI conversion experience – the control requirements are different from port-injection systems.
Product Details
The body is aluminium, single-piece construction. It handles under-hood heat and vibration without distortion.
The coil is wound to 2.0Ω. On a 12V system, that gives you a faster magnetic field rise time than a 3Ω or 4Ω coil. Faster rise time means the valve opens sooner – which is why the opening spec is 2.0ms instead of the typical 2.5ms.
The diaphragm is upgraded from standard material. It's more resistant to swelling and wear from gas contaminants. GDI systems often run at higher rail pressures, which increases wear on the valve seat – the upgraded diaphragm helps offset that.
The brass outlet fittings come with pre-installed seals. Mounting bolts are included. The goal is to reduce installation time – everything is in the box.
One thing to note: Gas quality matters on GDI conversions more than on port-injection. The injector rail is downstream of the filter. Install a good filter upstream and change it regularly – contaminants are the main cause of sticking.
Product Qualification & Strength Verification
We run each batch through standard pre-shipment checks:
High-frequency cycle testing
Temperature cycling
Pressure hold test
Response timing verification
Leak detection
We've been making export rails for a while. This version came out of feedback from GDI conversion shops – they needed a rail that responded faster and held up at higher pressures.
Batch records are maintained. Custom production is available for larger orders.
Shipping, Delivery & After-sales Service
Stable Delivery Capacity
We keep stock and maintain regular production. Samples, small orders, and full containers all move through the same system.
Diversified Shipping Methods
Express, air, or sea. We'll recommend based on your order size and destination.
Professional After-sales Support
We provide fitment confirmation before you order, installation guidance, and troubleshooting support after install. Our team has experience with GDI conversions, so we understand the specific issues that come up.
FAQ
Q1: Why does a GDI engine need a faster rail?
A:GDI injectors fire at higher pressure and have a shorter injection window than port-injection. If the gas rail opens too slowly, the timing doesn't match up – you get hesitation or rough transitions. The 2.0ms opening time on this rail is spec'd to match GDI requirements.
Q2: What's the difference between this 2Ω rail and a standard 3Ω one?
A: Coil resistance affects how fast the solenoid opens. Lower resistance = higher current draw = faster magnetic field build-up = quicker opening. The 2Ω coil opens in 2.0ms versus 2.5ms on the 3Ω version. On port-injection engines, the difference is negligible. On GDI, it matters because the injection window is shorter.
Q3: Does this rail handle higher fuel pressures than standard rails?
A: The working pressure range is the same – 0.05 to 0.2MPa, max 0.3MPa. The difference is not the pressure rating, it's the valve opening speed and diaphragm durability at those pressures. GDI systems operate at higher pressures more consistently, so the valve core and diaphragm need to hold up under continuous high-pressure cycling.
Q4: Does the rail come with a wiring harness?
A: No. The rail has standard terminals – you connect to your existing harness. We don't include a harness because most installations already have one.
Q5: Can you modify the rail for custom mounting positions?
A: For wholesale orders, yes. We can adjust mounting hole positions or bracket designs. MOQ and lead time depend on the change.
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