HOW IT WORKS

Gas is injected into the cylinder inlet manifold by individual gas electromagnetic valves installed as close to the suction valves as possible. The electromagnetic valves are separately timed and controlled by the ComAp injection control unit INCON.

This system interrupts the gas supply to the cylinder during the long overlap of the suction and exhaust valves (typical for slow-speed and medium-speed engines – while the valve overlap cylinder scavenging is performed). This avoids substantial gas losses and prevents dangerous gas flow to the exhaust manifold.

System for conversion of industrial diesel engines to bi–fuel operation by substitution of typically 60–90% natural gas for diesel or HFO.

• Suitable for engines with speed below 1000 RPM and output above 500 kW
• No reduction of engine power or efficiency
• Smooth transition between diesel and bi–fuel modes at any time
• Gas is injected directly before intake valve by high speed electromagnetic valves, one valve per cylinder
• No modification of internal engine components is required
• Automatic equalization of exhaust gas temperatures from individual cylinders

MAIN FEATURES

• Completely automatic system
• Extremely efficient operation – only very small percentage of diesel is necessary
• Cheaper electricity production
• Non-derated output power
• The same response to load steps
• High stability and increased protection of the engine
• Lower emissions
• Possibility of pure diesel operation maintained
• Prolonged service intervals
• Individual approach
• Turn-key solution
• Easy operation
   

TYPICAL CONVERTIBLE ENGINES

• Slow-speed (up to 750 rpm) turbocharged
• Middle-speed (around 1000 rpm) turbocharged

ELEMENTS OF THE SYSTEM

• Gas admission valves
• ComAp electromagnetic valves control unit INCON
• ComAp Bi-Fuel automatic control unit InteliSysNT BF
• ComAp bi-fuel governor ECON-3/ECON-3BF
• Safety valve(s) for air filling manifold
• Gas train (gas manifold, gas governor, double closing valve, filter, ball valve etc.)
• ComAp knocking detector/controller DENOX2/DENOX20