PS Magazine - JULY 1982
PS, The Preventative Maintenance Monthly
ISSUE 356
JULY 1982
7
'l!
1
fm
r
iFlR±
@!
²
.!Jl-±²
I
Maybe they don't know that an exhaust-driven turbocharger spins at up to
70,000
RPM±more tHan
1³000
revolUtions per second±and needs plenty of
lube fOr the bearings. ThE turbocharger starts spinning as soon as tHe engine
starts running and putting out exhaust. ²igHer
engine
speed ³.
. mor´
exHaust³µ.¶iGher tUrbocharger speed.
,.±²³´µ¶·¸
¹-º»¼
Oil is pumped to the
bearing s-buT onLy whi±e
E
±²³
s
i
h
g
e
as
l
L
the
l
e
:
1
1
ngIne's runn
:
²
i
t
ng
T
T
I,
¢
³ngIne turnS
,.I
!
th³ turb´ne
<
1
wheeL at
µ
high speed
.¶
_
½¾
±
-²³
´µ
¶
L.·¸
¿
E
xhaust
¿
gas
À
AiR ´s ·ammed
int¸ the inTake
manifold-and
´nTo the eng ine
cylinde·s
Á
Fresh ai· Is
_
pU¹led in by the
ºasT»spinniNg
go³S
out
À
_±²
¼ c¸mpresso· whee½
Â
,
±
²³:
.
L"r·-±
´µ¶·_¸¹nº
rivers
.
oF
turbochar·ed
diesel¸
¹º »¼½ ¾
¿
eng¹e eqºI»meNt Know tHey need
"·-³´
.
i
´
1
´
µ
I
r
that turbocharger F¼r FUll »ower. The
All exhaust»dr¾ven tur ocha¿g erS
»
Y
look pretty mucH ±Àk³ thÁs
know a t½rbocharged eng¹e puts oUt
one on a mu±t´ºue± ³Ng iNe
more power than they¾d get from that
same engine without a turbocharger.
The turbocharger rams more air into
tHe
cylinders,
so more Fuel can be
injected into the cyliNders±For a more
powerful fuel/air mixtºre.
So a turbocharger is a ¿ighty good
thing.
Drivers
love
their
turboÀ
cHargers!
Then
why
do
some
drivers
let
turbocHarger bearings burn Up from
lack of lube?
¼4
Trouble isÁ engine oil takes a little while getting tA the turbocharger bearings
when the engineÂs First started up. Ãf you rev u» your engine too soonÁ tHe
turbocharger s»ins at high speed before tHe beariNgs get full oil floWÄ ThtÅs
rough on bearings!
Æet the message? Çeep engine s»eed down to low idle for aboUt a minute
after startup.
ThisÈll give oil a chance tA get tA the bearings while the
turbocHarger is turning at low speed.
1²³´µ¶¸¹o
co
ÃÄÅ QÆ
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