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Page Title:
Section II. EQUIPMENT DESCRIPTION AND DATA |
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 TM
9-2990-206-34&P
1-4. REPORTING EQUIPMENT IMPROVE-
cedure, just simply tell why the design
is unfavorable or why a procedure is
MENT RECOMMENDATIONS (EIR).
difficult. EIR's may be submitted on
SF 368 (Quality Deficiency Report).
EIR'S can and must be submitted by anyone
who is aware of an unsatisfactory condi-
Mail directly to Commander, U. S. Army
Tank-Automotive Materiel Readiness
tion with the equipment design or use.
It is not necessary to show a new design
Command, Warren, MI 48090, ATTN: DRSTA-MP
or list a better way to perform a pro-
A reply will be furnished to you.
Section il. EQUIPMENT DESCRIPTION AND DATA
in pressure and leaves through an outlet
1-5. DESCRIPTION.
on the outside of the compressor hous-
a. General.
Engines equipped with
ing, and enters the engine induction
system.
turbosuperchargers deliver more power
per pound of fuel than unturbosuper-
A center housing supports the turbine
charged engines. Turbosuperchargers
wheel, shaft, and compressor wheel.
make use of the heat energy lost
The turbine wheel shaft is supported
through engine exhaust gases. Exhaust
by sleeve bearings. End play is con-
gases from the engine drive the turbine
trolled by a turbocharger thrust ring,
wheel assembly which in turn drives the
thrust bearing, and thrust washers.
turbocharger impeller (compressor wheel).
b. Operation. The exhaust gases
c. Lubrication. The turbosuper-
from the engine enter the turbine
charger is pressure lubricated from the
housing through the exhaust connection
engine lubricating system through an
on the turbine housing. The gases flow
external hose connected to the engine
around the housing and radially inward.
oil filter. The two turbine wheel
The exhaust gas pressure and the heat
shaft sleeve bearings have holes to
energy extracted from the gas causes
direct oil,to the bearing bores and
the turbine wheel to rotate. The
shaft journals. Oil passages in the
exhaust gases then exit through the
center housing connect the oil inlet
exhaust outlet of the turbine housing
port with grooves machined in the bear-
and vehicle exhaust system. Rotation
ing bores, which aline with holes in
of the turbine wheel causes the com-
the bearings. Oil leaves the center
presser wheel to rotate since they are
housing, via bearing clearances, through
mounted on a common shaft.
the oil drain tube to the engine oil pan.
Two turbocharger rings (spacer rings)
Air from the vehicle air filter enters
prevent oil from entering the compressor
housing, and one metal ring seal (seal
at the center of the compressor wheel
and flows radially outward through the
ring) prevents oil from entering the
compressor housing. The air increases
turbine housing.
1-2
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