25-04-2012, 02:54 PM
A methane mode water–oil blended internal combustion engine
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Introduction
The idea of using water/oil mixture combustion to improve combustion efficiency was put
forward as early as the 18th century. At the beginning of the 19th century, America, the USSR
and other countries in Europe began emulsion oil research. Because of the lower technology and
less pressing energy problem, the development of emulsion oil technology was rather slow. In the
late 1950s, as the conflict between the environment and development became sharper and sharper
and the petroleum crisis began to appear, the water/oil emulsion technology with its oil saving and
emission reducing benefits became important once again. The oil–water emulsion was regarded as
one of the three energy saving technologies at the First Annual Session of Internal Combustion
Association in July 1981. Later, America, the USSR, Japan etc.
Conclusions
As it can been seen from the combustion mechanism of the methane mode water–oil blend ICE,
there are some beneficial consequences as follows:
When the water/oil mixture (namely the water–oil blend), 1 mol of oil mixed with 4nm
2 mols
of water, i.e. 1 kg od oil mixed with 9ð4nmÞ
12nþmþ16y kg of water burns, its combustion products are like
those of methane’s combustion, thus forming an ideal condition known as methane mode combustion.
As for the methane mode water–oil blend ICE with four strokes, it has two individual
injection systems, one for Diesel and the other for water. Water injection starts at the moment
when the air inlet valve is closed, and the water injection angular duration is 30 CA. As for the
methane mode water–oil blend ICE with two strokes, when the scavenge port closes after the air
outlet valve, the water injection starts when the air inlet valve is closed, and the water injection
angular duration is 30 CA. When the air outlet valve closes after the scavenge port, water is
injected at the moment when the scavenge port is closed, and the water injection angular duration
is 30 CA. Then, the water injected into the engine combustion chamber does not affect the air
change of the ICE, and as a result, the operational materials in the cylinder are increased, which
leads to an increase of the output power. Meanwhile, the relatively lower pressure of the water
injection system is obtained, which makes it possible to get more reliability of the water injection
system.
Compared with the existing water–oil blended ICE, the methane mode water–oil blended
ICE takes advantage of the water/oil ratio M0, which integrates the strengths of both liquid fuel
and gas fuel, such as natural gas. The methane mode water–oil blend ICE is based on the fully
scientifically ideal mode of water–oil blend combustion. Accordingly, with its great significance to
environmental protection and energy saving, it reduces the reluctance of people to explore the
field of water–oil blend combustion.