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| Price | Negotiated |
| MOQ | Negotiable |
| Delivery Time | 5 - 8 work days |
| Brand | Caterpillar |
| Place of Origin | USA |
| Model Number | C7 |
| Packaging Details | Neutral Package or Fumigation Free |
| Payment Terms | D/P, T/T |
| Supply Ability | 1 pieces |
| Condition | Used | Engine model | C7 |
| Place of Origin | USA | Packaging Details | Neutral Package or Fumigation Free |
| Color | Same as pictures | Excavator model | E325D E329D |
| Material | Metal | Model Number | C7 |
| Supply Ability | 1 pieces | Brand Name | Caterpillar |
| Payment Terms | D/P, T/T | Price | Negotiated |
| Delivery Time | 5 - 8 work days | Product name | Used Engine Assembly |
| Quality | High performance | Part number | 444 - 7149 |
C7 Diesel Used Engine Assembly For Excavator E325D E329D 444 - 7149
Specification
| Car name: Engine Assy | Model Number: C7 | |
| Cylinder stroke: 127 | Cylinder diameter: 110 | |
| Application: Excavator | valve: 18 valve | |
| Cooling: Water cooling | Injection: Electric | |
| Number of Cylinders: 6 | Engine Type: Diesel | |
Description
Working of Four Stroke Diesel Engine
The
power
generation
process
in
four
stroke
diesel
engine
is
also
divided
into
four
parts.
Each
part
is
known
as
piston
stroke.
In
IC
engine,
stroke
is
referred
to
the
maximum
distance
travel
by
the
piston
in
a
single
direction.
The
piston
is
free
to
move
only
in
an
upward
and
downward
direction.
In
four
stroke
engine
the
piston
move
two
time
up
and
two
time
down
and
the
crankshaft
move
two
complete
revolution
to
complete
four
piston
cycle.
These
are
suction
stroke,
compression
stroke,
expansion
stroke,
and
exhaust
stroke.
Suction stroke:
In
the
suction
stroke
or
intake
stroke
of
diesel
engine,
the
piston
start
moving
from
top
end
of
the
cylinder
to
bottom
end
of
the
cylinder
and
simultaneously
inlet
valve
opens.
At
this
time
air
at
atmospheric
pressure
drawn
inside
the
cylinder
through
the
inlet
valve
by
a
pump.
The
inlet
valve
remains
open
until
the
piston
reaches
the
lower
end
of
the
cylinder.
After
it,
inlet
valve
close
and
seal
the
upper
end
of
the
cylinder.
Compression stroke:
After
the
piston
passes
the
bottom
end
of
the
cylinder,
it
starts
moving
up.
Both
valves
are
closed
and
the
cylinder
is
sealed
at
that
time.
The
piston
moves
upward.
This
movement
of
the
piston
compresses
the
air
into
a
small
space
between
the
top
of
the
piston
and
cylinder
head.
The air is compressed into 1/22 or less of its original volume. Due to this compression, a high pressure and temperature generated inside the cylinder. Both the inlet and exhaust valves do not open during any part of this stroke. At the end of compression stroke the piston is at top end of the cylinder.
Power stroke:
At
the
end
of
the
compression
stroke
when
the
piston
is
at
the
top
end
of
the
cylinder
a
metered
quantity
of
diesel
is
injected
into
the
cylinder
by
the
fuel
injector.
The
heat
of
compressed
air
ignites
the
diesel
fuel
and
generates
high
pressure
which
pushes
down
the
piston.
The
connecting
rod
carries
this
force
to
the
crankshaft
which
turns
to
move
the
vehicle.
At
the
end
of
the
power
stroke,
the
piston
reaches
the
bottom
end
of
the
cylinder.
