1.2. Engine characteristics
1.2.1 OMEGA combustion bowl
The OMEGA combustion bowl is a unit
designed to perform high efficiency, low
emission combustion. As the rim around the
combustion bowl port of the upper of the
piston has been machined in a smaller size
than the interior of the combustion bowl,
strong swirl is produced in the combustion
bowl and strong squish flow makes the fuel
be mixed more sufficiently with air.
Due to the application of OMEGA combus-
tion system and optimal utilization of intake
and exhaust port configuration within the
cylinder head, the POLUS P126TI and
DE12T (DE12 series) generator diesel
engines discharge very low level of haz-
ardous exhaust gases such as smoke,
nitrogen oxide, hydrocarbon, or carbon
monoxide and thus ensure high perfor-
mance and low fuel consumption.
1.2.2. Oil gallery cooling type pistion(P126TI)
Oil gallery cooling is used for the piston of
P126TI generator engine.
When thermal loading is high, piston cool-
ing by means of an oil gallery in the crown
is normally necessary to prevent crown
cracking and ring sticking. The design of
the gallery, the design and location of the
oil spary nozzel and the quantity of oil flow-
ing in the gallery are critical in order to
achieve the desired temperature reduction.
The cross section shape of the gallery
should be designed to achieve sufficient oil
movement to maximize cooling efficiency.
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EA8M1001
