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Top dead center
Meaning
Noun
●
In Automotive:
A
position
in the
four-stroke
combustion
process wherein the
piston
is at the
topmost
point in its
stroke
. This can either be during the
compression
phase
or the
combustion
phase
.
●
In Automotive:
The
reference mark
on a
flywheel
(and
engine block
)
indicating
the
engine
is in the
top dead center
position
, when aligned.
Sourced from
Wiktionary
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