Converted dual fuel engines mix the natural gas with combustion air just before it enters the cylinder. This is done under moderate pressure, slightly higher than the boost pressure from turbocharger. Automatic adjustment of beginning and duration of gas admission provides desired gas volume and optimal flushing and cooling of cylinder by flow of filling air. Individual cylinder timing control enables steady engine operation. Read more about Important facts
Main features
- Gas injection by electromagnetic valves
- Each cylinder controlled individually
- Precise timing
- Quantity of gas (duration of gas valve opening) depends on required output and speed
- Full electronic control
- Equalisation of exhaust temperatures
- Safety monitoring system
- Gas electromagnetic valves
- Gas valve control unit
- Gas train
- Engine automatic control unit
- Safety elements
System Scheme
Extent of modification
Installation of gas electromagnetic valves on each cylinder head or intake manifold
Connection of gas valves to gas supply via electronically controlled gas train
Additional pressure- and temperature- sensors (if necessary)
Magnetic pick-ups on camshaft and flywheel (where applicable)
Liquid fuel delivery blocking device
Electronic control unit
Safety explosion covers
Gas safety monitoring system
Advantages
Avoids gas losses to exhaust manifold
Gas is introduced to combustion space only, which limits risk of uncontrolled explosions
Enables higher liquid fuel substitute by gas
Engine's suitability
CES system has been developed for conversion of naturally aspirated and supercharged engines with speed below 1.000 rpm and output higher than 0,5 MW.
GEV animation [GIF]
This article came from CES
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