Kubota M108S, Workshop Manual

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1-M3
M108S, WSM ENGINE
[3] CYLINDER HEAD
This engine employs four valve system, the cylinder
head is provided with double intake passenge in order to
ensure appropriate air suction and give an optimum swirl.
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[4] CENTER DIRECT INJECTION SYSTEM (E-CDIS)
V3 series DI engine adopts the Center Direct Injection
System (E-CDIS), in which the injection nozzle is
positioned upright at the center of the cylinder.
This system serves to inject fuel directly at the center
of the cylinder. By so doing, injected fuel and suction air
can be mixed more uniformly, leading to more stable,
higher combustion performance. In other words, cleaner
emission, higher power output, lower fuel consumption,
lower operating noise and higher start-up performance
have been achieved.
V3 series DI engine has two intake valves and two
exhaust valves per each cylinder.
The rocker arm (5) contacts a bridge arm (6) instead
of the valves stem tip.
The bridge arm then contacts both intake valves or
bath exhaust valves and causes two valves to open
simultaneously.
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(1) Intake (2) Exhaust
(1) Injector
(2) Exhaust Valve
(3) Piston (4) Intake Valve
(5) Rocker Arm
(6) Bridge Arm
KiSC issued 06, 2007 A