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This power pack is
designed and manufactured in the form of a separate module which is to be welded
to the hull instead of the hull rear part which is to be previously cut
off. The above-mentioned engine is a two-stroke multi-fuel liquid-cooled diesel
engine with uniflow scavenging, opposed pistons and horizontal placement of
cylinders.
The engine can burn various types of fuel: diesel fuel, petrol, kerosene, jet
engine fuel or their mixture in any proportion. Power is taken off the two sides
of the crankshaft. The engine is fixed with the help of two cylindrical
supports positioned coaxially with the power take-off shaft and located on the
engine ends and with the help of one front support located on the engine
bottom surface. This method of installation of the engine requires neither
adjustment nor centering which are required when installing the original engine
in the standard version of the tank. The main specific features of the power
pack with 5TDFM engine consist in an ejection-type cooling system,
high-efficiency inlet air cleaning system, high air-tightness of the power pack
compartment, availability of a special air intake device enabling the
tank to cross 1.8 m deep water obstacles. The engine is fitted with a
liquid closed-loop forced ejection-type cooling system. The cooling system
ejector operates by using engine exhaust gas. The fact that there is no fan or
drive reducer results in a considerable reduction of the cooling system weight,
high level of reliability and self-control, possibility of tank operation
at high ambient temperatures without any loss of performance.
The high efficiency cyclone/cassette-type air cleaner ensures air
purification with efficiency of 99.8 %. The modernization results in the
following:
- increase of average speed on natural soil road by 22 %;
- possibility of tank operation at ambient air temperature of up to +
55 degrees Celcius;
- possibility of tank operation in dusty conditions for
35 engine operation hours or 1000 km of run before maintenance of air cleaner
cassettes is required;
- ability cross water obstacles to a water depth of 1.8 m
without preparation.
The modernization in question (replacement of power pack) can be carried out
at small enterprises in the workshops provided with lifting equipment with
capacity of up to 15 t, metal cutting and welding equipment.
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