3TNV88 4TNV84 4TNV88 Yanmar Diesel Engine Assembly For Excavator
PC55 Water Cooling
Specification
| Car name: Complete Engine |
| Model Number: 4TNV88 |
| Cylinder stroke: 90 |
| Application: Excavator |
| Cylinder diameter: 88 |
| valve: 16 valve |
| Cooling: Water cooling |
| Output: 22.7kw |
| Injection: Electric |
| Cylinders of number: 4 |
Description
Cylinder Head
Attached to the engine through cylinder bolts, sealed with the head
gasket.
The cylinder head contains many items including the valve springs,
valves, lifters, pushrods, rockers, and camshafts to control
passageways that allow the flow of intake air into the cylinders
during the intake stroke.
As well as exhaust passages that remove exhaust gases during the
exhaust stroke.
Crankshaft
The crankshaft is located in the lower section of the engine block,
within the crankshaft journals (an area of the shaft that rests on
the bearings).
This keenly machined and balanced mechanism is connected to the
pistons through the connecting rod.
Similar to how a jack-in-the-box operates, the crankshaft turns the
pistons up and down motion into a reciprocal motion, at engine
speed.
Camshaft
Varying from vehicle to vehicle, the camshaft may either be located
within the engine block or in the cylinder heads.
Many modern vehicles have them in the cylinder heads, also known as
Dual Overhead Camshaft (DOHC) or Single Overhead Camshaft (SOHC),
and supported by a sequence of bearings that are lubricated in oil
for longevity.
The role of the camshaft is to regulate the timing of the opening
and closing of valves and take the rotary motion from the
crankshaft and transfer it to an up and down motion to control the
movement of the lifters, moving the pushrods, rockers, and valves.
Timing Belt/Chain
A timing belt, timing chain, or cambelt is a part of an engine that
synchronizes the rotation of the crankshaft and the camshaft so
that the engine’s valves open and close at the proper times during
each cylinder’s intake and exhaust strokes.
