Mitsubishi S3Q2, Руководство по обслуживанию

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ADJUSTMENT AND OPERATION
13-7
1.5.4 Setting governor (setting maximum speed)
(1)
While increasing the engine load to a full-load level,
hold the speed control lever in the specified maximum
speed position.
(2)
Keeping the lever in the specified maximum speed
position, turn and set the governor setting bolt
(maximum speed setting bolt) to the specified speed.
Setting governor
1.5.5 Measuring speed variation rate
(1)
Measuring speed variation rate with load removed
Operate the speed control lever, and set the engine to
the rated output and rated speed condition. Under this
condition, instantaneously remove the load to bring the
engine into the no-load condition. Do this without
disturbing the speed control lever position. The engine
speed will quickly rise but then will lower and stabilize.
Record the momentary maximum speed (
Ｎ
2
),
stabilized speed (
Ｎ
3
), and the time needed for the
engine to stabilize its speed from the moment the load
is removed(
ｔ
1
).
(2)
Measuring speed variation with load applied
While operating the engine in a no-load condition,
instantaneously apply a specified load to the engine.
Record the momentary maximum speed (
Ｎ
5
),
stabilized speed (
Ｎ
6
), and time needed for the engine to
stabilize its speed from the moment the load is
applied(
ｔ
2
).
(3)
Calculating speed variation rate
Calculate the speed variation rate from the results of
above measurements. If the speed variation rate
deviates the specified limits, make an adjustment by
changing the governor notch setting.
Measuring speed variation
Governor setting
bolt
N
1
N
2
N
3
N
4
N
5
N
6
t
2
t
1
N
4
㧙
N
6
N
4
× 100
N
4
㧙
N
5
N
4
× 100
N
3
㧙 N
1
N
1
× 100
N
2
㧙 N
1
N
1
× 100
Momentary speed variation (%) Permanent speed variation (%)
Momentary speed variation (%) Permanent speed variation (%)
N
1
= Engine speed before removal of load (min -1 )
N
2
= Engine speed at removal of load (min
-1
)
N
3
= Stabilized engine speed after removal of load (min -1 )
t
1
= Stabilization time
N
4
= Engine speed before application of load (min
-1
)
N
5
= Engine speed at application of load (min -1 )
N
6
= Stabilized engine speed after application of load (min
-1
)
t
2
= Stabilization time
At application of load
At removal of load