Pure plant oil is more compressible than diesel, due to the fact that it adsorbs greater quantities of air. A more compressible fuel takes longer to pressurize to the degree necessary to inject it into the cylinder, and as a result the precisely calibrated injection timing is thrown out of synchronization. This can cause unwanted rebound of injector needles or other components in highly pressurized areas of the fuel injection system.
Cavitation damage
The presence of air can also cause cavitation damage to components of the fuel injection system, including the injection nozzles. This delays the injection of fuel, interfering with ignition timing and thereby affecting power output. It may also cause the engine oil to become contaminated with fuel, and result in reactive residues in the combustion chamber.
The eoil solution:
The fuel is exposed to ultrasound waves in the ultrasound chamber. This minimizes compressibility and so prevents cavitation damage.
Fuel delivery
The viscosity of pure plant oil is significantly higher than that of diesel, particularly at low temperatures. As a result, the original paper fuel filters cannot maintain the necessary flow rate, especially in cold weather.
Fuel filtering
If warm pure plant oil comes into contact with air, it oxidizes, causing it to resinify and gum up paper fuel filters. Pure plant oil also contains varying quantities of lipids which can cause membranes to form, and these compact the paper’s microstructures. For this reason, the filters used for diesel are not suitable for use with pure plant oil.
The eoil solution:
The eoil-Systemplus avoids these problems by replacing the original fuel filters with a new filter system, designed to prevent water and dirt in the fuel from getting into the engine.
Oxidation
If warm pure plant oil comes into contact with air, it oxidizes, causing it to resinify. This reduces its combustibility, and increases its propensity to break down into water and acids through hydrolysis.
Deposits
As with diesel, if the pure plant oil combusts incompletely, it can leave deposits of reactive residues in the engine, in places like valve guides and piston ring grooves. This will ultimately increase the mechanical strain on moving components, and impair engine performance. Conventional diesel contains additives to prevent deposits from forming, but with pure plant oil there is no such safeguard.
Polymerization
No engine design can entirely prevent fuel from contaminating the engine oil, but with conventional diesel, this is not really a problem, as the fuel vaporizes at the oil’s working temperature. However, pure plant oil has a higher boiling point and so does not vaporize. Under certain conditions its presence in the oil can result in a polymerization process that prevents the lubricant from working, resulting in irreparable damage to the engine.
The eoil solution:
The eoil-Systemplus prevents both polymerization and deposit formation. This is made possible by the lack of preheating, a nitrogen-rich atmosphere in the fuel circuit (ultrasound chamber – fuel feed line – injection unit – fuel return line – ultrasound chamber) that prevents oxidation, and the introduction of the AdRU additive via the air intake manifold.
