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B3.3T 4D95T Used Engine Assembly For Excavator PC120 - 5 JCM908D
Specification
Car name: Complete Engine | Model Number: 4D95T | |
Cylinder stroke: 125 | Cylinder diameter: 115 | |
Application: Excavator | valve: 8 valve | |
Cooling: Water cooling | Injection: Direction |
Description
How Does A Diesel Engine Turn Fuel Into Power?
Animation showing the four stages of a diesel engine: intake,
compression, power, and exhaust.
Four-Stroke Engines:
Like a gasoline engine, a diesel engine normally works by repeating
a cycle of four stages or strokes during which the piston moves up
and down twice during the cycle (in other words, the crankshaft
rotates twice).
Intake: Air is drawn into the cylinder through the open green air
intake valve on the right as the piston moves down.
Compression: The intake valve closes, the piston moves up,
compressing and heating the air mixture. Fuel (dark blue) is
injected into the hot gas through the central fuel injection valve
and ignites spontaneously. Unlike a petrol engine, no spark plug is
required for this.
Power: As the air-fuel mixture ignites and burns, it pushes the
piston down and drives the crankshaft, which sends power to the
wheels.
Exhaust: The green exhaust valve on the left opens to release the
exhaust gases expelled by the returning piston.
Advantages Of A Diesel Engine
The diesel engine is much more efficient and preferable as compared with gasoline engine due to the following
reasons:
They are more rugged and reliable
There is no sparking as the fuel auto-ignites. The absence of
spark-plugs or spark wires lowers maintenance costs
Fuel cost per Kilowatt produced is thirty to fifty percent lower
than that of gas engines
An 1800 rpm water cooled diesel unit operates for 12,000 to 30,000
hours before any major maintenance is necessary. An 1800 rpm water
cooled gas unit usually operates for 6000-10,000 hours before it
needs servicing
Diesels get great mileage. They typically deliver 25 to 30 percent
better fuel economy than similarly performing gasoline engines.
Diesel fuel is one of the most efficient and energy dense fuels
available today. Because it contains more usable energy than
gasoline, it delivers better fuel economy.
Diesel engines are built to withstand the rigors of higher
compression. Consequently, they usually last much longer than
gas-powered vehicles before they require major repairs.
Disadvantages Of A Diesel Engine
Although diesel fuel used to be cheaper than gasoline, it now often
costs the same amount or more.
Although diesel fuel is considered to be more efficient because it
converts heat into energy rather than sending the heat out the
tailpipe as gas-powered vehicles do, it doesn’t result in flashy
high-speed performance.
Diesels still need regular maintenance to keep them running. You
have to change the oil and the air, oil, and fuel filters.
If you neglect the maintenance and the fuel injection system breaks
down, you may have to pay a diesel mechanic more money to get
things fixed than you would to repair a gasoline system because
diesel engines are more technologically advanced.