Important facts

The concept

The concept of using dual-fuel on diesel engines is not new. Rudolf Diesel, who invented the engine bearing his name, experimented with enriched combustion air mixtures in the early 1900’s. Before long, natural gas became popular as an enriching fuel for two main reasons... read full concept

System objectives

We had following criteria in mind when developing CES technology:

  • No reduction on performance of the engine
  • Keep or prolong maintenance cycles
  • Automatic control of all vital engine parameters
  • Elimination of risks connected to use of gas
  • Price the system to repay its capital cost within 12 months of normal operation.

The CES system meets all the objectives.

Conversion Process

  1. Evaluation – Conversion proposal is prepared based on information about the engine such as brand, type, output, RPM, supercharging, valves overlap etc.
  2. On-site inspection (if necessary) – Detail design of diesel-to-Dual Fuel conversion is elaborated based on inspection by our engineers on site.
  3. Technical and commercial clarifications – Final detailed technical and commercial conditions of contract.
  4. Production of Conversion Kits + Shipment
  5. Installation supervision and commissioning – Supervision of conversion works and subsequent commissioning are provided by our engineers under the agreed terms, when necessary. Time of installation depends on engine type, scope of conversion and local facilities/condition.

Benefits summary

Less Fuel Costs
On an equivalent energy basis, natural gas fuel costs have traditionally been lower than liquid fuel.

Practically no engine modifications required
Diesel engines can be converted relatively easily because there are no changes in the engine compression ratio, cylinder heads, or basic operation as a diesel cycle engine. Sophisticated computer controlled dual fuel systems are easy to install and easy to maintain.

Non derated power output
Engine nominal output and main parameters (jacket water temperature, exhaust air temperature, etc.) remain same.

Possibility of original diesel operation
The system can fall back to full diesel operation whenever natural gas is unavailable, with no interruption of service.

Reduced maintenance costs
Maintenance costs are reduced due to the clean burning characteristics of natural gas. Testing has shown that dual fuel engine oil remains cleaner compared to engines running with diesel oil fuel. This brings enhanced engine life time and extended service cycles.

Lower exhaust emissions than diesel engine
Testing has demonstrated a 30% reduction in NOx and a more than 50% reduction in particulate matter emissions when operating in dual fuel compared to straight diesel fuel.