M-1
DIESEL ENGINE
03-M Series, WSM
1. ENGINE BODY
[1] HOLLOW CORE
The cylinder block has a hollow core (1) already cast
inside the cylinder-to-cylinder water jacket.
In this core, there is a pair of vertical cooling
passages (right and left) as well as multiple horizontal
cooling channels that interconnect these cooling
passages. This design allows smoother cooling water
flow through the cylinder block, which cools down a wider
range between the cylinders more effectively.
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[2] PISTON
Piston’s skirt is coated with
molybdenum
disulfied
+
, which reduces the piston slap noise and
thus the entire operating noise.
+
Molybdenum disulfide (MoS
2
)
The molybdenum disulfide (1) serves as a solid
lubricant, like a Graphite or Teflon. This material helps
resist metal wears even with little lube oil.
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[3] BUILT-IN DYNAMIC BALANCER (BALANCER MODEL ONLY)
Engine are sure to vibrate by piston’s reciprocation.
Theoretically, three-cylinder engines are much less
prone to cause vibration than four-cylinder ones (second
inertia, etc.). However, any engine has many moving
parts in addition to its pistons and cannot be completely
free from vibration.
The four cylinders engine V2203 and V2403 can be
fitted with balance weight on crankcase to absorb the
second inertia mentioned above and reduce vibration.
This engine is internally provide with two balancers
(1), one at the suction side and the other at the exhaust
side.
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(1) Hollow Core
(1) Molybdenum Disulfide
(1) Balancer
KiSC issued 08, 2012 A
