The Science of CiBUS21

Enhanced Combustion - Internationally Patented Technology

How Does The System Work?

The heart of the system is the Alchemist Controller, a unique, internationally patented technology, which works in harmony with the engine's own Electronic Control Unit (ECU).

The system simply listens to the vehicles Canbus, monitoring the amount of diesel burnt by the engine in normal use. A minimum amount of reagent necessary to create the maximum improvement in combustion efficiency is then added. This "Enhanced Combustion" releases more energy from the fuel with the immediate effect of less fuel being required.

The increased output generated by Enhanced Combustion is registered by the engine's ECU through the vehicles On Board Diagnostics (OBD). The ECU responds by reducing the diesel supply, so that the performance drops back to its normal parameters. This means that the engine's ECU stays in control and continues to operate the vehicle within its normal performance limits.


Increased performance with improved fuel economy and lower emissions

Enhanced Combustion is fundamentally different to fuel replacement, whereas the majority of dual fuel systems operate on the principal of replacing 30-40% of Diesel fuel with a cheaper secondary fuel to create a fuel saving, the Alchemist system is a fuel saving, range-extending and harmful exhaust emissions reduction control technology targeted at heavy-duty diesel engines through the principal of Enhanced Combustion.

Unlike multi-fuel systems, the patented scientific approach alters the molecular structure of the diesel fuel, inhibiting the formation of carbon particulates and speeding up the flame front of the combustion event, harvesting more of the chemical energy into tractive  effort. The experienced efficiency gains are 15 to 25 per cent fuel savings, reduced carbon particulate matter by up to 95 per cent, and reduced NOx and CO2 emissions by up to 97 and 42 per cent respectively.


The efficiency gains increase in high displacement engines operating at low rpm in stop/start scenarios. The lower circa 15% gains were registered on HGVs operating on largely motorway runs between distribution centres. The gains increased to circa 30% in urban settings. Applications include:

  • Logistic company HGV – fastest ROI.

  • Refuse and delivery vehicles in urban settings – emissions and efficiency gains

  • Military vehicles – operational and strategic mobility as well as performance gains. May also have utility in extending length of service by meeting standards.

  • Generators.

  • Construction and mechanical handling plant.

  • Marine engines – not yet trialled.

Installed by Licensed Engineers

Installations are carried out by accredited gas technicians who are fully trained diesel fitters and/or automotive electricians.

The key components of the system are all of OEM quality and specially designed for these applications. All components comply with the strictest regulations and certifications.

Transferable to Other Vehicles

Thanks to its improved fuel economy and less wear and tear on the engine, an enhanced diesel vehicle should have a greater resale value. However in the event of the operator preferring to remove the system, then it can easily be transferred to another vehicle. The original vehicle will then revert back to its original performance characteristics.

A Simple Bolt-on Solution

The system is simple to install and only requires a minor, reversible, modification to the air inlet manifold. It will not interfere with the vehicle's controls in any way.

The Alchemist Controller is normally housed in the cab, the injectors, which control the flow of the secondary gaseous fuel, are housed in the engine bay and a gas tank is attached to the chassis.

Liquid Petroleum Gas

  • Any secondary gaseous fuel can be used as the reagent, including: Liquid Petroleum Gas (LPG), Compressed Natural Gas (CNG), Liquid Natural Gas (LNG) and Methane. For convenience, the system currently uses Liquid Petroleum Gas.

  • The automotive use of LPG has an excellent International safety record.

  • All the components used are from leading branded suppliers and the work is carried out to the highest regulatory standards.

  • The enhancement effect itself is inherently safe, due to the small amount of gas being used - all it is used for is to make the diesel burn better.

  • The CiBUS Alchemist Technology fitted to a diesel engine will automatically default to diesel only in the event of any malfunctions in the LPG system.


  • The time taken to refuel is similar to that of an ordinary diesel vehicle.

  • There is a well-established network of LPG re-fuelling points throughout the UK and a Bunkering Service will be available from Calor and Flo Gas for bulk fuelling at depots for fleet users.

Insurance Backed Warranty

A Lloyds of London insurance backed warranty is provided, which covers both the equipment and also the vehicle.

Regulatory Points

  • The Alchemist system does not require any emissions approval from the EEVS (Energy Efficiency Verification Specialists) but this is being done in any event. Advice from VOSA (Vehicle and Operator Services Agency) is that because Alchemist is not a dual fuel system it is not a notifiable change to the engine of any given vehicle, this is because it defaults back to diesel should the Alchemist installation suffer a failure for whatever reason.

  • The new Alchemist system is showing a gas consumption of less than 10% ratio gas to diesel; this qualifies the gas management by Alchemist as an additive. Further, because it aids ignition during the combustion cycle it is exempt from manufacturers’ warranty terms and conditions under EU law.

Purchase or Lease Facility

The system can be purchased outright or leased.





This is an average fuel consumption reduction of 20%

A logistics operator with a fleet of 100 HGV trucks spends circa £5,219,481 a year on fuel for the fleet.

Fitting Alchemist to these would save a gross sum of over £1,000,000 p.a. on this bill based on current data ( and we know how to do better)

Try our HGV RIO calculator here 


Improved Performance

The vehicle will feel better to drive thanks to:

 • An increase in low down torque/power which means that the vehicle "pulls" better.
 • Less gear changes as the driver will go through the gears more quickly when accelerating and will not have to down-shift as often when pulling up gradients.
 • Shorter journey times.

Longer Engine Life and Reduced Maintenance

Rather than putting extra stress on the engine, by forcing it to operate at higher temperatures, the enhanced Combustion system should lead to a longer engine life with:

  • Lower core temperatures from the improved combustion

  • Less wear and tear due to the absence of soot in the engine and oil system.

  • Less stress and strain due to the increase in power within the engine's normal operating limits.

  • Reduced maintenance of Diesel Particulate Filters through reduced emissions.


The Evidence

Early testing was carried out on rolling roads and on a variety of vehicles, and emissions were analysed by independent bodies. Over this period the software and control unit have been improved and efficiency gains increased. Since then ‘real world’ trials have been conducted with a major logistic company – these results proving to be even better than those on the rolling road.

Early Developmental Trial Results

Vehicles trialed:

  • MAN EURO 3 Tractor Unit

  • Vauxhall Movano Van EURO 4

  • Gulley Sucker EURO 4

  • MAN EURO 4 (Milbrook results)

  • Torque Developments International

    • Transit Van EURO 5

    • DAF Tractor Unit – Bidvest

Rolling Road Results for a 2 Litre Van

  • Ford Transit Van – 2.2 litre, 4 cylinder, EURO 5 compliant

  • Fuel efficiency improvements were:

  • 9.75% average improvement

  • Particulate improvements were:

  • 33.83% average improvement 74.84% peak

  • NOx improvements were:

  • 66.74% average improvement 79.7% peak

  • Anecdotal road trial results showed a 23% diesel reduction

Rolling Road Results DAF 9.2 Litre Tractor Unit

  • DAF model 85.460 (6c) tractor unit – 9.2 litre, 6 cylinder, EURO 5 compliant

  • Peak fuel efficiency improvement is 34.25% at 30mph 

  • The average rolling road fuel efficiency improvements are:

  • 25.69% at 25KW axle load

  • 12.19% at 50KW axle load

  • 5.92% at 70KW axle load

  • 14.60% overall average at 56mph

‘Real world’ trials have all delivered better results than the rolling road and over time the Alchemist control unit has been improved as seen below

Emission testing at Cranfield University

  • gigawatt laser

  • exhaust part of diesel engine



Real World Trials


The ‘real world trials’ took place initially between Manchester and Scotland traversing the Lake District’s Shap Fell twice a day, then going onto a series of multi-drop routes over the Pennines and the Peak District. The performance of the truck was monitored comprehensively by Telematics but the most telling feedback has been from the yard manager of the logistics company base. The Alchemist enhanced truck was performing its daily run in company with two other identical trucks of the same age. During the first week of this trial the Alchemist truck consumed £236 less diesel than its unmodified sisters over an approximate mileage of 1,400 miles, evidenced by the measured amount of fuel used to refill both trucks on their return to base; this is the equivalent of a saving close to 25% over the normal consumption.

In terms of bottom-line benefits the fitting of Alchemist would give a logistics operator of this type of truck a saving of over £13,000 per year over their confirmed annual mileage of 125,000. Bearing in mind that conditions during that first week of the current trial were cold and snowy we would anticipate this benefit to increase under better climatic conditions. Interestingly the logistics company driver assigned to this route made identical comments about the handling and feel of the truck to those made by the driver used for the Millbrook tests.

Report from the Test Driver at Millbrook


Emma, the driver, had 14 years’ service in the RLC driving everything from Landrovers to HETs and after leaving the Army she has worked for a number of haulage companies and is also serving as a reservist with 157(Welsh) Transport Regiment. Her report is shown below:


Driving the truck with gas input into the diesel improved the performance and handling of the truck when the vehicle is cold, you can actually feel improvement on the handling and not just that the pick up on the vehicle is a lot smoother and faster, the gear changes are much smoother and also the engine does not seem to be working as hard when pulling a load of 20 tons of sand. 
The last couple of days from driving the truck I've felt a difference whilst driving the truck with gas on. I have also seen the improvements the gas has on the engine. I drove the truck from Newport on Monday morning with no gas input and after picking the trailer up in Leicester with the 20 tonne of sand the truck struggled on a slight incline, on Tuesday morning the gas was introduced into the diesel and from then on you could notice improvement on the performance of the vehicle. It also made it easier to handle on corners and easier to drive with and without a load. 

I am sure companies and drivers will appreciate the benefits of the fuel savings and more comfortable drive it gives.

Many thanks