1.
ENGINE DESCRIPTION (Engine Specification) Y'AIfMAII 8NZllAlL-V
1, ENGINE DESCRIPTION
1-1. Engine Specification (1/2)
Model Unit 6N21L-DV I 6N21L-UV I 6N21L-SV I 6N21L·EV
Type - Vertical, water-cooled, 4-cycle diesel engine
Combustion chamber -- Direct injection type
No. of cylinders -- 6
Cylinder bore mm 210
Stroke mm 290
Total cylinder displacement . 60.27
Compression ratio _. 15.8
Rated speed of revolution min- 1(rpm) 720 or 750
Direction of rotation of
-- Counterclockwise as viewed from the flywheel end (XL)
crankshaft
Operating side - On the left as viewed from the flywheel end
Firing order - 1-4-2·6-3-5-1
Supercharging system - Exhaust gasturbine supercharger (turbocharger) with air cooler
• Mixing type 2-line (Fresh water) cooling
• Separate type 2-line cooling
Cooling system - (Cylinder jacket: Fresh water)
(Coolers : Sea water)
Forced lubrication
lubricating system - (system oil also used as turbocharger lub.oil)
(system oil also used as rocker arm lub.oil)
Lubricating oil sump sys
- Sump incorporated in common bed
tem
Starting system - Air motor starting
Overall length mm 3,166
Dimen
OVerall width mm 1,544
sions
Overan height mm 2,032
8,600
Mass (of engine singly) kg
(may vary as depending on specification)
Constitution of Model Designation
of cvnnoers
~
NO.
Engine series [Configuration of Cylinders)
6 ~10,: :c:m)GV
75om,c.'~ ~ 1~)(~)(D0®CD~
re
WIO'A' 720 e- Flywheel
WrA": 900 or lQOOmin·1
Marine auxiliary/Land use
Degree of supercharging
2003.1.20R 1-1 (Volume:6pages)
1. ENGINE DESCRIPTION (Engine Specification) WlN_ .1I21lAlL-V
1-1. Engine Specification (212)
6N21AL 6N21AL 6N21AL 6N21AL 6N21AL
Model Unit
DV UV SV EV GV
Type -- Vertical, water-cooled, 4-cycle diesel engine
Combustion chamber -- Direct injection type
No. of cylinders --- 6
Cylinder bore mm 210
Stroke mm 290
Total cylinder displacement l 60.27
Compression ratio - 15.6
Rated speed of revolution mln- 1(rpm} 900 or 1.000
Direction of rotation of
crankshaft
- Counterclockwise as viewed from the flywheel end (XL)
Operating side - On the left as viewed from the flywheel end
Firing order - 1-4-2-6-3-5-1
Exhaust gas turbine supercharger (turbocharger) with
Supercharging system -
air cooler
• Mixing type 2-lloe (Fresh water) cooling
• Separate type 2-line cooling
Cooling system -- (Cylinder jacket: Fresh water)
(Coolers : Sea water)
Forced lubrication
Lubricating system ,- (system oil also used as turbocharger lub.oil)
(system oil also used as rocker arm lub.oil)
Lubricating oil sump system - Sump incorporated in common bed
Starting system - Air motor starting
Overall length mm 3.166
Dimen-
slons
Overall width mm 1.544
Overall height mm 2.032
Mass (of engine singly) kg
8.600
(may vary as depending on specification)
Constitution of Model Designation
(Configuration of Cylinders)
1~)(D000CD~ F,ywhee,
2003.7.1R 1-2
1. ENGINE DESCRIPTION (Types of Accessories & Attachments) y__ 6N2IlAIL-¥
1-2. Types of Accessories & Attachments
Attachment Type Remar1<s
Supercharger Exhaust gas turbine Air cooled, radial
Charge air cooler Plate finned multitubular
Governor Hydraulic Hydraulic oil built-in (Type NZlRHD)
Fuel injection pump Bosch Two-way delivery valve type
Bosch
Fuel injection valve Non-cooled, with nozzle sleeve
(long-stem. multiple jet nozzle)
Pressure regulating value integrated,
Gear
Fuel feed pump for M.D.C. pipe line
Motor-driven gear* For H.F.O. pipe line, equipped to the hull.
M.D.C. : Manual back-washing
Fuel oil filter Duplex, changeover notch wire H.EO. : Heal-insulating, manual
back-washing
Lub.oil pump Gear
Lub.oil cooler Low finned multltubular
(I) Changeover notch wire Manual back-washing
Lub.oil strainer
( D) Centrifugal For bypass
Lub.oil tank Tank incorporated In common bed
Lub.oil priming pump Motor-driven gear
Cooling water pump Centrifugal Cylinder jacket side, cooler side
Fresh water coolere Plate or multitubuJar Equipped to the hull
Air motor Turbine Compressed air
*Note: An asterisk (*) refers to an optional attachment.
2003.1.20R 1-3
1. ENGINE DESCRIPTION (Sectional View of the Engine) YAIIMAR &N21(A)L-V
1-3 (1/2). Sectional View of the Engine
I OPERATING SIDE I INON-OPERATING SIDEI
Bonnet/Rocker Arm Cover Valve Bridge
Suction/Exhaust Valve
Rocker Arm Exhaust Manifold Cover
Push Rod Exhaust Manifold
Cylinder Head
Fuel Injection Pump
Pump Housing Cover
Charging Chamber
Tappet
Swing Arm
Cam Case Cover
Camshaft
Connecting Rod
Connecting Rod Bolt
Cylinder Block---t-t--1\"""""--:r r~~~~M
Side Cover
Side Bolt
2003.1.20R 1-4
1. ENGINE DESCRIPTION (Sectional View of the Engine) VANMAR 6N21(A)L-¥
1-3 (2/2). Sectional View of the Engine
~H~~ @@ @~ @@ mm~
m .~
Timing Gear
Camshaft Gear
Gearcaielt 1.,)
CJ, I:~ III--~I.=Z;......
nr . . . li)
r"o
L\}, ,\'~}I)
LJ::;;:=ifl-
~ ~R!
,~~r
::l
I\;
~~
::l '-
do..
\
~ ...r;:~t ~I
1'=l;L ,'""-
ft
I:'
~.{ It=
I......
I
C l: ,
~ l~ 1 ~' Ii: I
l' .;.. ,
I~·
\.do, ~- ~Fuellnjection
nI
f/5(_J) t--
~
I
~
Protection Ring
CylinderLiner
Valve
f-
I tl
~'f"Y""
I £f:
j ~
Y
i ~
~
I
II rm Vl\1I1
0
.....
1III nlll
0
1l1li. VI"" I
0
r......
11I1n11l1
0
.--Piston
Piston-pin
T .... ~ ~1,I, S
PI' _"_I'
,I ~ ~
il
)J I 'l= ,'-. 'l:: 11 ,:: --- Piston-pin Metal
~_... r-
f-
_. II. 1./
--~ ~.Cooling Nozzle
(for piston cooling)
L.::f~ m n r ~~~ t ~ ~ra~k-Pin
~
~ I~., ~ ! ! v ~crankShaft
~ ~1V
==Jt Q~'" QJ ~ fi. ~ ~ JL.~
I"'T'
~
-
ill
r~"'r~ctJ'f-""VCtJ C:J~h"'~~v w
L.::fl.J
Cp
Wl.J QAI.
I
Metal
I II _ rft, ( _ _ r--~-- ~ ~ I'll ( ~
III l-~ ~ ~ T ~
l' '\' i--"" ~~ --
"" n.. _(c r- ~ 5\. 1i'
_... it _(( '-.- i\
f---r+I
...dsJ:_' II
I · ~F::N
i I to- 1'-. ~
I-~ _ "=~ ............:..~ ~~ -........::e:::::..-- ~ ~l.llo .....
IFr=?
U
~
-,
I' J;Wl,
I
rr _II
~ lIIlJI
-,
,'/ LIJ I
~I
Main Bearing
"-
,... '- ,- I I t- -..... ~ Thrust Bearing
I
\\
~ain Bearing Cap
I Main Bearing Bolt
Oil Pan
/ /
Balance Weight
Crankshaft Gear
2003.1.20R 1-5
1. ENGINE DESCRIPTION (Engine Appearance & Attachment Arrangement) VA"MAII &N21(A)L-V
1-4. Appearance of the Engine & Its Attachment Arrangement
Drawing 1-1. Item Part Name
1 Gauge panel
I OPERATING SIDE' 2 Starting Switch
3 Governor
2 4 4 Turbocharger (RH163/183)
5 Air Motor
6 Turning Device
7 Reducing valve
8 Flywheel
9 Fuel Pressure Regulating Valve
10 Lub. Oil Thermostatic Valve
11 Lub. Oil Cooler
12 Lub. Oil Pump Safety Valve
Lub. Oil Strainer
13
(for bypass)
Lub. Oil Strainer
14
(for eng. system oil)
Lub. Oil Strainer
15
(for turbocharger)
Lub. Oil Pressure Regulating
16
Valve
Bypass valve
17
(SeaWater)
Safety valve
9 7 8 18
(for crankcase)
19 Charge Air cooler
20 Lub. Oil Pump
Cooling Water Pump
21
(Fresh waterline)
22 Start/Stop Lever
23 Fuel Filter
24 Fuel Feed Pump
Drawing 1-2.
I NON-OPERATING SIDEl I ENGINE FRONT SIDE I
19 10 11
22
23
18 17 16 15 14 13 12 20 21 24
2003.1.20R 1-6
