TM-9-2990-206-34P
TURBOSUPERCHARGER AlRESEARCH MODEL T18C01
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)
TM-9-2990-206-34P - Page 12 of 85
1-4. REPORTING EQUIPMENT IMPROVE-
cedure, just simply tell why the design
MENT RECOMMENDATIONS (EIR).
is unfavorable or why a procedure is
difficult.
EIR’s may be submitted on
EIR’S can and must be submitted by anyone
SF 368 (Quality Deficiency Report).
who is aware of an unsatisfactory condi-
Mail directly to Commander, U. S. Army
tion with the equipment design or use.
Tank-Automotive Materiel Readiness
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
1-5.
DESCRIPTION.
a. General.
Engines equipped with
turbosuperchargers deliver more power
per pound of fuel than unturbosuper-
charged engines.
Turbosuperchargers
make use of the heat energy lost
through engine exhaust gases. Exhaust
gases from the engine drive the turbine
wheel assembly which in turn drives the
turbocharger impeller (compressor wheel).
b. Operation. The exhaust gases
from the engine enter the turbine
housing through the exhaust connection
on the turbine housing.
The gases flow
around the housing and radially inward.
The exhaust gas pressure and the heat
energy extracted from the gas causes
the turbine wheel to rotate. The
exhaust gases then exit through the
exhaust outlet of the turbine housing
and vehicle exhaust system.
Rotation
of the turbine wheel causes the com-
presser wheel to rotate since they are
mounted on a common shaft.
Air from the vehicle air filter enters
at the center of the compressor wheel
and flows radially outward through the
compressor housing. The air increases
in pressure and leaves through an outlet
on the outside of the compressor hous-
ing, and enters the engine induction
system.
A center housing supports the turbine
wheel, shaft, and compressor wheel.
The turbine wheel shaft is supported
by sleeve bearings. End play is con-
trolled by a turbocharger thrust ring,
thrust bearing, and thrust washers.
c.
Lubrication.
The turbosuper-
charger is pressure lubricated from the
engine lubricating system through an
external hose connected to the engine
oil filter.
The two turbine wheel
shaft sleeve bearings have holes to
direct oil,to the bearing bores and
shaft journals.
Oil passages in the
center housing connect the oil inlet
port with grooves machined in the bear-
ing bores, which aline with holes in
the bearings.
Oil leaves the center
housing, via bearing clearances, through
the oil drain tube to the engine oil pan.
Two turbocharger rings (spacer rings)
prevent oil from entering the compressor
housing, and one metal ring seal (seal
ring) prevents oil from entering the
turbine housing.
1-2
TM
9-2990-206-34&P
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