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.
