All type
Page
1/5
Fuel Injection Timing Maintenance Procedure
?? ?? ?? ???? ??
Section No.
M35400
Rev.
1A
HYUNDAI HEAVY INDUSTRIES CO., LTD. Engine & Machinery Division 08.05/RSK
?? ?? ?? ??
? ???? ?? ?? ??? ?? ???? ???
? ???, ?? ?? ?? ??? ?? ??? ????
?? ??? ??? ????? ????? ????.
1. ??????? ??? ???, ????(????
A53000-109)? ???? ?? ??? ? ???
????(?? 1 ??)
2. ?? ?? ??? ????? ?? ?? ?????
???? ?? ? ?? ??? ???? ????
?? ?? ??. (?? 2 ??)
3. ??? ???? ????? ??? ?? ??? ?
?, ??? ????? ??? ???. (?? 3 ?
?)
4. ??? ?? ???? ???? ?? ??????
?? ??? ??? ?? ?? ???? ?????
?????.
5. ??? ??? ?? ???? ??? ??? ???
??? ??? ???? ??? ????. (?? 4
??)
6. ?? ??? ?? ?? ???? TDC ?? ???
? ??? ??. ? ? ?? 10.0??? ?? ??
?? ?? ?? ??? BTDC 10.0??? ??.
(BTDC = ??? ?)
7. ? ??? ?? ?? ??? ? ??? ??? ??
???? ?? ?? ??? ?? ?? ????.
Checking Fuel Injection Timing
The fuel injection timing at each cylinder can be
compared with other cylinders’ by means of reading a
crank angle when fuel ports at fuel injection pump’s
barrel are closed by its plunger.
1. Close ball valves in fuel supply/return line and
remove fuel oil inside the pipe by means of
dismantling a plug from end block (Item no.
A53000-109). (See Fig.1)
2. Dismantle two deflectors from fuel injection
pump in order to check its fuel ports then remove
the rest fuel oil in pump using compressed air
and open the window for flywheel scale. (See
Fig.2)
3. See inside a deflector hole by using a mirror and
give a light into the opposite deflector hole. (See
Fig.3)
4. Turn the crankshaft at engine rotating direction
until the light is cut out due to closing fuel ports
by its lifting plunger.
5. Stop the crankshaft just after cutting the light and
mark the flywheel scale indicated by flywheel
indicator. (See Fig.4)
6. Count the deviation crank angle between the
mark and its cylinder TDC. If it is 10.0, the
cylinder’s fuel injection timing becomes BTDC
10.0. (BTDC = Before Top Dead Center)
7. If all cylinders’ fuel injection timing is needed, it is
recommended to read in order of firing.
All type
Page
2/5
Fuel Injection Timing Maintenance Procedure
?? ?? ?? ???? ??
Section No.
M35400
Rev.
1A
HYUNDAI HEAVY INDUSTRIES CO., LTD. Engine & Machinery Division 08.05/RSK
8. ?? 6??? ?? ? ??? ?? ?? ??? ?
??? ?? ??? ?? ?? ?? ?? ??? ?
? ??.
8. Normally their average value is considered as
the representative fuel injection timing of the
engine.
Fig.4 Read flywheel scale from TDC
(TDC? ???? ?? ??? ???)
Fig.2 Remove deflectors from FIP
(?? ?? ????? ???? ??)
Fig.3 See a light through two deflector
holes by using a mirror.
(??? ?? ? ?? ???? ??? ??? ?
?? ?? ????)
light
mirror
Fig.1 Remove fuel oil through a plug hole at end
block(item no. 109)
(????? ???? ?? ??? ? ??? ????)
All type
Page
3/5
Fuel Injection Timing Maintenance Procedure
?? ?? ?? ???? ??
Section No.
M35400
Rev.
1A
HYUNDAI HEAVY INDUSTRIES CO., LTD. Engine & Machinery Division 08.05/RSK
?? ?? ?? ??
?? ?? ??? ?? ???? ?? ??? ? ??
? ??? ??? ???? ?? ?? ????. ?? ?
???? ?????? ??? ?? ? ? ??? ??
??? ? ??. ??? ???? ??? ???????
???? ??? ??.
1. ?? ????? ??(???? A19300-350)? ?
??? ?? ?? ?? ?? ??.
2. ????? ???? ?? ??? ??? ? ???
????? ???? ????? ?????. (? ?
?? ?? ??? ??? ??? ??? ? ???
??? ?????.)(??5 ??)
3. ???? ??(???? A35000-393) ?? ? 1?
?? ??.
4. ???? ??? ??? ??. (??6 ??)
5. ???? ??? ??? ??? ?? ????? ?
???? ???? ??? ????. (?? 2? ??
? ? ?????? ?????? ? ??????)
6. G094000? ??? ??? ??? ???? ???
??. ??? ? ? ?? ?? ???? ??? ?
? ?? ??? ????.
Adjusting Fuel Injection Timing
The fuel injection timing can be adjusted but is
recommended NOT to do because this work gives a
sensitive influence to engine performance. However it
can be done according to a result of enough
discussing with HHI Customer Support Department.
In any case, maximum combustion pressure should
be kept within specified value.
1. Open the gear-case cover (up) (item no.
A19300-350) and the window for flywheel scale.
2. Turn crankshaft (anticlockwise if it is required to
advance fuel injection timing) by means of a
turning gear in order to see position marks on
disc for camshaft gear and camshaft gear. (See
Fig.5)
3. Loosen all mounting bolts for camshaft gear
(item no. A35000-393) by about 1 turns.
4. Mark on the flywheel scale indicated by flywheel
indicator. (See Fig.6)
5. Watching flywheel scale, turn the crankshaft by a
needed crank angle (anticlockwise if it was
turned anticlockwise at the above number 2) and
mark on the flywheel position indicated by
indicator.
6. Tighten all mounting bolts for camshaft gear with
the torque specified by G094000. After tightening
bolt by bolt, mark the bolt with any sign to
confirm all bolt tightened.
All type
Page
4/5
Fuel Injection Timing Maintenance Procedure
?? ?? ?? ???? ??
Section No.
M35400
Rev.
1A
HYUNDAI HEAVY INDUSTRIES CO., LTD. Engine & Machinery Division 08.05/RSK
7. ???? ??? ? ? ??? ??? ??? ??
? ???? ?? ??? ??? ?? ???? ?
????. (???? ?? ??? ‘-’??? ‘+’??
????? ?? ???? ???? 2?? ? 1?
? ????.)
8. ?? ????? ??? ???? ?? ?? ??
????.
9. ?? 5??? ? ?????? ??????, ??
?? ?? ??? ???? ‘+’ ???? ????
???, ??????? ???? 1?? 6bar ??
? ???.
10. ?????? ?? ?? ??? ???? ? ???
??.
H17/28: (-)2.0° ~ (+)2.0° ????
H21/32: (-)2.0° ~ (+)2.0° ????
H25/33: (-)1.6° ~ (+)0.6° ????
7. Confirm whether the gap of two marks on
flywheel is the aimed value and also coincides
with the movement of position mark of camshaft
gear. (Camshaft gear position mark is adjustable
only in the range of ‘-’ index and ‘+’ index. Crank
angle 2 degree corresponds to cam angle 1
degree)
8. Close the gear-case cover (up) and the window
for flywheel scale.
9. If you turned anticlockwise at the above number
5, the position mark on camshaft gear would
move the ‘+’ direction on the disc for camshaft
gear and maximum combustion pressure would
be increased by 6 bar per 1° crank angle.
10. The adjustable range of fuel injection timing is
depending on engine type as followings:
H17/28: (-)2.0° ~ (+)2.0° crank angle
H21/32: (-)2.0° ~ (+)2.0° crank angle
H25/33: (-)1.6° ~ (+)0.6° crank angle
All type
Page
5/5
Fuel Injection Timing Maintenance Procedure
?? ?? ?? ???? ??
Section No.
M35400
Rev.
1A
HYUNDAI HEAVY INDUSTRIES CO., LTD. Engine & Machinery Division 08.05/RSK
z ?? ???? ?? ?? ?? ?? ?????,
M51101 ??? ?.
z If adjusting fuel injection timing of some cylinders
is needed, see M51101.
+
_
(Gear side)
(Disc side)
Disc for camshaft gear
Camshaft Gear
Camshaft
‘ A’
Fig.5 Position mark on camshaft gear and disc for camshaft gear
(????? ???? ?? ??)
View ‘A’
Position mark
Gear-case cover (up)
Fig.6 Flywheel scale (???? ??)
|
|
