Single & Dual Injection Gas ECU Control System for CNG LPG Car Conversion
We supply a gas ECU for CNG and LPG conversions. It handles both single-injection and dual-injection engines – hence the name.
This is a 48-pin unit with a 32-bit automotive-grade processor. It's designed to work across a wider range of vehicles than the basic ECUs you see on the market. 4-cylinder to 8-cylinder, single or dual injection, CNG or LPG – it covers most of what you'll run into.
What makes this different from a standard universal ECU is the feature set. It has built-in OBD diagnostics, leak detection alarm, AC/AEB curve adjustment, and auto-calibration. The circuit board is 4-layer with full short-circuit protection. These aren't fancy extras – they're the things that prevent callbacks and failures down the road.
We see this used in shops doing high-volume conversions, fleet operators, and wholesalers supplying gas conversion kits.
Product Introduction
If you've done enough conversions, you know the ECU is often the weakest link. Cheaper universal ECUs have limited pinouts, slow processors, and almost no diagnostic capability. When something goes wrong, you're left guessing.
This one has 48 pins – enough to handle the signal inputs and outputs for most multi-cylinder engines. The 32-bit processor is fast enough to keep up with engine speed changes without lag. It reads injection timing, adjusts gas delivery accordingly, and does it in real time.
It's compatible with both CNG and LPG, and it works on 4 through 8-cylinder engines. The auto-calibration feature cuts down install time – you don't need to spend hours on manual tuning. And the OBD function lets you read and clear fault codes, which makes troubleshooting easier on the bench.
Product Parameter
|
Item |
Specification |
|
Pin Definition |
48 pins |
|
Maximum Adaptable Cylinders |
8 cylinders |
|
Applicable Engine |
4-8 cylinder single injection / dual injection gasoline engines |
|
Applicable Fuel |
CNG / LPG dual fuel |
|
Core Chip |
32-bit automotive-grade high-speed processor |
|
Built-in Functions |
OBD fault reading & clearing, fuel injection speed acquisition, gas leakage buzzer alarm, AC/AEB curve adjustment, automatic calibration |
|
Stability Design |
4-layer stable circuit board, full-line short-circuit protection |
Product feature and application
Core Product Features
48-pin full-function layout – more inputs/outputs than basic ECUs
32-bit processor – fast enough for real-time injection adjustment
Single and dual injection compatible – covers both manifold injection types
CNG and LPG – works with both fuels
OBD diagnostics – read and clear codes directly
Gas leak alarm – built-in buzzer triggers on detection
AC/AEB curve adjustment – fine-tune gas delivery for different loads
Auto-calibration – one-click adaptive matching to engine parameters
4-layer PCB – better noise immunity and heat dissipation
Short-circuit protection – prevents board damage from wiring faults
Main Application Scenarios
This ECU goes on 4-8 cylinder single or dual injection gasoline vehicles being converted to CNG or LPG. It's used in new conversions, system upgrades, and replacing failed or outdated ECUs.
Common scenarios:
Passenger cars getting gas conversions
Light commercial vehicles in fleet operations
Shops doing high-volume conversion work
The combination of wide engine coverage and built-in diagnostics makes it a practical choice for operations that see a variety of vehicles.
Product Details
The 48-pin layout follows a standard industrial configuration. Wiring definitions are clearly marked – no guesswork during installation. The extra pins mean you don't run out of channels for sensors and actuators like you do on 20-pin or 30-pin units.
The 32-bit chip handles the math. It reads crank and cam signals, calculates injection timing, and adjusts gas injector pulses on the fly. The response is fast enough that you don't feel the transition between fuels.
The 4-layer PCB reduces internal signal interference – important in the noisy electrical environment of an engine bay. It also spreads heat better than single or double-layer boards.
Short-circuit protection covers the main power and signal lines. If a wire gets pinched or a sensor shorts, the ECU cuts power to that circuit rather than frying the board. That's a repair cost we don't see on this unit.
The gas leak detection module uses a sensor input – if it detects gas, the buzzer sounds. It's a safety feature that catches leaks the driver might not notice.
AC/AEB curve adjustment lets you fine-tune the gas delivery profile for different engine loads. Not all engines respond the same way to gas, and having the ability to tweak the curve helps get the drivability right.
Auto-calibration is the feature that saves time. It runs through a learning cycle, reads the factory injection signals, and maps the gas delivery to match. It doesn't eliminate the need for a road test, but it cuts the bench time considerably.
Product Qualification & Strength Verification
Each unit goes through testing before shipping:
High-temperature aging
Short-circuit impact test
Signal precision verification
Full-load functional test
Long-term stability run
The boards are built in a controlled production environment with consistent component sourcing. We keep test records for traceability.
For volume orders, we can provide batch test summaries on request.
Shipping, Delivery & After-sales Service
Stable Delivery Capacity
We maintain stock and run regular production. Sample orders and bulk shipments move through the same system.
Diversified Shipping Methods
Express, air, or sea. We'll recommend the best option based on order size and destination.
Professional After-sales Support
We provide:
Fitment confirmation before purchase
Installation guidance (including wiring diagrams)
Calibration support for AC/AEB curves
Troubleshooting assistance
We don't offer on-site support, but we respond within 24 hours for technical queries via email or messaging.
FAQ
Q1: What's the difference between this and a basic 20-pin universal ECU?
A: Pin count and processing power. A 20-pin unit has fewer inputs and outputs – you run out of channels for sensors and actuators. The 32-bit processor on this one is faster than the 8-bit or 16-bit chips you find on basic units. That matters when you're trying to match fuel delivery on a modern engine with variable timing.
Q2: Does this ECU work on both single and dual injection engines?
A: Yes. Single injection and dual injection are both supported. It reads the existing injector signals and adapts the gas injection timing accordingly. No hardware changes needed between the two types – it's a configuration setting.
Q3: What OBD functions are built in?
A: Read and clear fault codes. That's the main one. It also reads engine RPM and injector timing data. It doesn't do live data streaming like a full diagnostic tool, but it gives you enough to identify basic issues.
Q4: What does the auto-calibration actually do?
A: It reads the gasoline injection signals from the original ECU while the engine is running on petrol. Then it calculates the gas injection parameters to match – fuel map, timing offsets, temperature compensation. It gets you close enough for the engine to start and run on gas. Final tuning is still needed, but it saves most of the manual setup time.
Q5: Do you supply wiring diagrams and pinout documentation?
A: Yes. Full wiring diagrams and pin definitions are provided with each unit. We also have a quick-start guide for installation.
Hot Tags: single & dual injection gas ECU control system, China single & dual injection gas ECU control system manufacturers, suppliers, factory, 4 Cylinder Universal Gas ECU Control System, Crankshaft Sensor Gas Ignition Advance Computer, Custom 4 Cylinder OBD Gas ECU Control System, engine control unit, GDI In Cylinder Direct Injection Gas ECU Control System, Single Dual Injection Gas ECU Control System
