GBK Envieco supplies, installs and services Huegli Tech dual fuel systems. Your existing diesel engines run on natural gas or biogas with diesel as the pilot fuel. You cut fuel costs without replacing the engine.
A dual fuel retrofit replaces most of the diesel with cheaper, cleaner gas. Diesel stays on as the pilot fuel that ignites it, so the engine keeps its diesel reliability and can switch back to 100% diesel at any time.
Cheaper than a pure gas engine and far cheaper than replacing the engine. It's an attractive retrofit for existing diesel installations, and operating costs fall with every litre of diesel the gas replaces.
No internal changes are needed. The standard compression ratio, pistons and diesel architecture stay as they are. Installation typically takes 2–3 days with minimal downtime.
A small diesel injection ignites the gas–air mixture, giving reliable combustion under all operating conditions. No spark plugs or complex ignition systems are needed.
The engine typically runs on around 30% diesel and 70% natural gas. The Huegli Tech DF-ECU controls both fuels at once, so it responds to load changes better than a pure gas engine and maximises savings at steady load.
The ECU monitors engine parameters and opens the gas valve once the load goes above the set point (25%). From then on it controls:
Gas is metered automatically from air mass flow, boost pressure and engine load (kW) to hold the right air–fuel ratio.
A diesel pump actuator trims pilot fuel on FIP engines. ECU-controlled engines keep their own speed control.
Knock sensors and a CAM sensor identify which cylinder is knocking, so the ECU can correct that cylinder.
The ECU monitors inlet air, manifold air–gas, per-cylinder exhaust and turbocharger exhaust temperatures, and balances both banks on V engines.
Many low-cost dual fuel kits use a PLC and a fixed manual gas valve. Huegli Tech uses a dedicated dual fuel ECU that responds within milliseconds, so the engine can run safely closer to its limits and achieve higher substitution.
| Feature | Huegli Tech ECU-based system | Typical PLC-based system |
|---|---|---|
| Response speed | Very fast (milliseconds) | Slow to moderate scan cycles |
| Knock detection | Cylinder-wise (knock + CAM sensors) | Overall vibration only, can't identify the cylinder |
| Gas control | Fully automatic, AFR-based | Fixed valve with manual tuning |
| Efficiency | High | Moderate |
| Safety | High: auto gas reduction on knock or over-temperature | Lower: risk of knock and misfire |
| Diagnostics | Engine fault codes (DTC), data logging, PC software | Basic industrial diagnostics |
| Best for | High-performance, high-efficiency DF engines | Basic or temporary retrofits |
Each kit is engineered for your engine model, power rating and site conditions. Every part is designed for industrial and marine environments.
A microprocessor-based controller that manages gas admission, diesel reduction and engine protection. It has CAN bus integration, data logging and remote monitoring.
Complete gas conditioning and safety: filtration, pressure regulation and emergency shut-off valves, built to international industrial gas safety standards.
A precision Venturi mixer for an even air–gas mixture, available in sizes from RM25 to RMV40 for different engine displacements.
High-sensitivity piezoelectric sensors mounted on the engine block detect combustion irregularities before they can damage the engine.
Manifold air pressure and temperature sensors supply the data for mixture optimisation and load compensation.
A mechanical or electronic actuator that controls diesel injection quantity on FIP engines, giving precise pilot fuel delivery for reliable ignition.
Traditional high-speed diesel engines with mechanical fuel injection pumps are ideal for dual fuel retrofit.
Modern common rail engines with an electronic control unit can also be converted. The Huegli Tech DF-ECU works alongside the engine's own ECU.
Methane content of 85% or more gives the best combustion efficiency and engine performance.
Renewable biogas from anaerobic digestion, typically 55–65% methane. It needs basic conditioning to remove moisture and H₂S.
Coke oven gas and selected process gases with enough calorific value. Each one is assessed individually.
Indian installations range from small commercial backup generators to large industrial prime-power gensets, each customised to its operating needs and gas supply.
Continuous-duty sites, where diesel savings add up fastest.
Manufacturing, process and heavy industry with a PNG connection.
Hospitals, malls, IT parks and data centres with long run hours.
Sugar mills, distilleries, dairies and waste-to-energy sites that use their own gas.
Well sites and facilities with associated or pipeline gas available.
High-speed diesel engines in demanding duty cycles.
Huegli Tech dual fuel installations in India
GBK Envieco handles the whole project, backed by Huegli Tech engineering.
We evaluate your existing gensets, gas supply and operating needs to choose the right configuration.
We design the system for your engine model and power rating, and for local ambient temperature and altitude.
Certified technicians install the system, then test it and validate its performance on site.
We train your operators and provide ongoing technical support for safe, reliable operation.
Enter your genset details and local fuel prices for an estimate. We'll confirm the real figures after a site assessment.
Estimate only. Assumes a power factor of 0.8, diesel use of about 0.27 L/kWh, and 1.05 SCM of gas per litre of diesel replaced. Actual results depend on engine condition, load profile and gas quality.
Engineering vision for eco-friendly power, from Bengaluru.
GBK Envieco supplies, installs and services Huegli Tech dual fuel conversion systems for diesel engines and gensets across India.
Talk to us about a site assessment, a savings estimate or a quote for your engines.
Contact us| Company name | GBK ENVIECO PRIVATE LIMITED |
|---|---|
| Registered office | 2/323 Church Street, Sunnambupatti, Then Nandhiyalam Village, Rathnagiri, Ranipet District, Tamil Nadu – 632517 |
| Bengaluru office | 434/A, 24th Cross, 13th Main, Banashankari 2nd Stage, Bengaluru, Karnataka – 560070 |
| Call | +91 99448 90500 |
| GST number | 29AAHCG0510H1ZW |
| Contact person | Parthiban G |
| Mobile | +91 90080 03645 |
| parthiban@gbkenvieco.com |
Tell us about your gensets and gas supply. We'll arrange a site assessment and a savings proposal.
Parthiban G
Mobile: +91 90080 03645
2/323 Church Street, Sunnambupatti, Then Nandhiyalam Village, Rathnagiri, Ranipet District, Tamil Nadu – 632517
434/A, 24th Cross, 13th Main, Banashankari 2nd Stage, Bengaluru, Karnataka – 560070
No. 112/2, 2nd Floor, APL Complex, NH46 Chennai–Bangalore Highway, Perumugai, Vellore 632009, Tamil Nadu