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Introduction of the new Daihatsu Diesel
Diesel engine
Introduction Specification Comparison
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Introduction Specification Comparison
Introduction
Concept
Principal data of DC-17
Sectional plan
Features
Benefits
ISO 9001 / ISO 14001
1.Designed for easy installation and operation
2.High reliability,durability,and low running cost
DSP system / Maintenance tools
Major parts (with dimension)
3.Efficient combustion with smaller bore diameter
CFD analysis
Low load limit with heavy fuel oil
Reliability and durability of 900min-1 engine under heavy fuel operation
4.Environmental Awareness
5.Compatibility with Electronic Commerce / 6.Simple Fresh Water Cooling System
7.Integrated Engine Safety, Control, and Monitoring System (Option)
8.Electronic fuel injection device (Option)
9. Required working hours for engine maintenance / 10.Maintenance interval and parts life
1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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Concept
1
Introduction Specification Comparison
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Introduction Specification Comparison
Principal Data of DC-17
Number of Cylinder
Cylinder Bore × Piston Stoke
Stroke/Bore-Ratio
Engine Speed
Piston Speed
Generator Output
Break Mean Effective Pressure
Max. Combustion Pressure

Fuel Oil
Engine dry Mass
Generator Set dry Mass
(mm)
(min
-1
)
(m/s)
(kWe)
(MPa)
(MPa)
(kg)
(kg)
5
440
2.09
5,600
9,930
900
8.1
1,000
9.0
6
560
2.21
6,250
11,000
900
8.1
1,000

9.0
φ170 × 270
1.59
16
up to 700 mm
2
/s @ 50°C (CIMAC H55)
Engine Model 5DC-17 6DC-17
2
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Sectional plan
Fuel injection system
Piston
Cam and camshaft
Connecting Rod
Crank shaft
Cylinder Head
Exhaust Pipe
Cylinder Liner
Frame
Main Metal / Crankpin Metal
3
*Special cast iron for high resistance to
heat and pressure
*Optimal swirl port
*Effective cooling of F.O. injection valve
area
*Hydraulically tightened four studs
*DSP (Single pipe) system
*Optimal matching of inlet and exhaust

timing
*Passage design for maximum turbo
charger efficiency
*Special cast iron material for durability
*Use of protect ring
*Optimal cooling design
*Aluminium metal alloy for maximum
resistance to wear, corrosion, and
pressure.
*High rigidity monoblock structure
*Hydraulic tightening for main bearing
holder and side bolt
*Good accessibility for inspection and
maintenance
*Frame casting with cooling water and air
passage
*L.O. passage drilled into the frame
*Large diameter cams for durability against
high F.O. injection pressure
*Two piece unit cam
*High compression ratio (S/B =1.59) and
optimal combustion chamber design
*3 rings
*Top & 2nd ring groove hardened
*Block type high-pressure pipe
*Mono-block plunger barrel
*Non-cooled fuel nozzle
*Horizontally cut 3 piece design
*Big end portion tightened hydraulically
*Manufactured by CGF method

*Dynamic analysis for optimum design
*Shaft diameter for optimum oil film
thickness
*Highly balanced
Introduction Specification Comparison
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Comparison
Features
4
1.
Designed for easy installation and operation
Pipeless structure with fewer pipe connection points
and concentrated auxiliary parts
3D-CAD DATA
1) Piping Reduction
*Concentration of connection
points and reduction in number
of pipes

2) Piping Structure
*No exterior piping for cooling
water and lubrication oil.
*Non-cooled F.O. nozzle as
standard
*Parts number reduced by 50%
compared to conventional
engine

3) Easy Maintenance
*Inlet and exhaust piping on the

same side of the engine for
easy inspection and overhaul
of the F.O. pump.
*Auxiliary parts concentrated in
one area for easy maintenance.
F.O. LEAK OUTLET
F.O. OUTLET
F.W. INLET
F.W. OUTLET
F.O. INLET
Introduction Specification Comparison
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Features
5
2.
High reliability, durability, and low running cost
1) Low F.O. consumption with smaller bore
(Thermal efficiency = 40%)
2) Low L.O. consumption and longer cylinder
liner duration by the use of the protect ring
3) Easy assembly / disassembly procedure
*Simple design with fewer parts number
*Efficient maintenance tools
*Horizontally cut 3 piece connecting rods
4) Compact design of major and
replacement parts
Without liner protect ring
Combustion process Upward stroke
Combustion process
Upward stroke

Cylinder Liner Partial
Wear
Calcium Composition
Hard Composite Material
(Lub. oil &F.O.residue)
Lack of Piston Gap Leads
to Lub. oil Scraping
Scraping-off Carbon Deposit
Protect Cylinder Liner from
Flame
Reduce Top-ring
Temperature
Secure Piston Gap for
Prevention of Lub. Oil
Scraping
Effect of "Liner Protect Ring"
Introduction Specification Comparison
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Features
6
2.
High reliability, durability, and low running cost
Exterior view of the DSP exhaust pipe
Maintenance tools
(Cylinder head)
Maintenance tools
(Main bearing holder)
Maintenance tools
(Connecting rod big end portion)
Hydraulic Jack

Hydraulic Jack
Hydraulic Jack
Benefits of DSP (Daihatsu Single Pipe) system
1) Higher turbocharger efficiency
2) Simple design for easier maintenance
3) Fewer parts
Introduction Specification Comparison
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7
2.
Major parts (with dimension)
Piston assy Intake / Exhaust Valve Connecting rod assy
DK-20
DC-17
20.0kg
10.5kg
0.6kg
0.4kg
0.6kg
0.4kg
43.0kg
26.5kg
283
Ø200
Ø170
230
291.5
291.5
Ø14 Ø14
Ø64 Ø64

Ø56Ø56
Ø12Ø12
249
249
72
81
260
78
81160 550
60
145 480 65
55
64
Features
High reliability, durability, and low running cost
Introduction Specification Comparison
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8
3.
Combustion technology for low load / heavy fuel oil
operation with smaller bore
1) Optimum engine parameter (bore, stroke, compression ratio,
pressure ratio, inlet and exhaust valve diameter, timing, injection
system, etc.)
2) Optimal swirl combustion
3) Increase of stroke / bore ratio
4) Use of piston with high compression ratio
5) Optimal combustion pressure and injection pressure
6) Reduced mechanical loss and air flow resistance loss
7) Simple fresh water cooling system with the use of 2 stage

intercooler for different coolant temperature
Combustion chamber with high-pressure ratio
(mm)
340
320
300
280
260
240
220
200
180
160  170  180  190  200  210  220 (mm)
Bore
(B)
Stroke (S)
S/B=1.6
S/B=1.5
DK-20
DC-17
Conventional Engine
DC-17
Conventional Engine
=15.0
SB3
SB1
TC1
AC1
SB2
23

MP12
MP11
3
PI1
MP2
MP5MP6MP7MP8MP9MP10
MP3
MP4
J6 J5 J4 J3 J2 J1
MP1
1
456789
101112131415
161718192021
Features
Efficient combustion with smaller bore diameter
Pressure fluctuation analysis
Analysis model diagram
Comparison of Stroke / Bore ratio
Engine parameter optimisation simulation
Introduction Specification Comparison
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9
3.
CFD analysis of optimal swirl
CFD analysis of optimal fuel injection pattern
Features
Efficient combustion with smaller bore diameter
CFD analysis of non-cooled F.O. nozzle
Tornado cooling method (Patent pending)

Introduction Specification Comparison
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10
3.
Low load limit with heavy fuel oil
Low Load Operation Limit On Heavy Fuel
Partial Load Safety
0.1 1 10 100 1000
100
10
1
Fuel oil
Vis. <=700cSt at 50°C
CCAI <=850
RUNNING HOUR (hr)
10% Load (Pme 0.23MPa)
35.5hrs
70% Load (Pme 1.7MPa)
30min. Blow-off Operation
After continuous operation at 15% load,
the engine must be operated at >=60%
load for more than 30 min.
Injection pressure 88MPa
NEW ENGINE
Injection pressure 40MPa
CONVENTIONAL
30
20
10
0

0 102030405060
Fuel particule dimension (µm)
Composition %
80
70
60
50
40
30
20
11 12 13 14 15 16
Compression Ratio
Boost Air Temp. °C
500°C
550°C
600°C
CONVENTIONAL ENGINE
NEW ENGINE
Features
Efficient combustion with smaller bore diameter
Introduction Specification Comparison
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11
3.
Reliability and durability of 900min
-1
engine under heavy fuel operation
Inspection result of 900/720min
-1
engines on actual vessels

Result of 900min
-1
engine overhaul
Ship
Delivery
Operating hours of generator
Navigation Route
Fuel
Eng. Model
No. of Cyl.
Gen. rated output
Eng. rated output
Pme
Average load
Item (Frictional loss per 1000hrs)
1st 1st piston ring
3rd 3rd piston ring
Cyl. liner around 1st piston ring
Exh.valve (outer dia )
Exh. valve guide (inner dia )
Intake valve (outer dia )
intake valve guide (inner dia )
550,000CF Reefer
May, 1997
6,100hrs
Japan, N.&S.America
720kW
774kW
1.86MPa
70~80%

0.0015mm
0.0025mm
0.0077mm
0.0025mm
0.0045mm
0.0015mm
0.0023mm
69,000WT Ore Carrier
Feb. 1994
6,500hrs
Japan, Australia, SE Asia
440kW
472kW
1.42MPa
50~70%
0.0013mm
0.0023mm
0.0095mm
0.0023mm
0.0044mm
0.0014mm
0.0021mm
Before investigation
Gen. efficiency;93%
Wear limit
0.3mm
0.3mm
+1.0 0.3mm
0.3mm
0.3mm

0.3mm
0.3mm
The reliability and durability of the DC-17 Diesel engine is heightened by
incorporating the features of the DK-20 engine with a delivery record of over 2000
engines, along with the new combustion technology for the small bore engine.
900min
-1
720min
-1
Note
380cSt@50°C
6DK-20
6
Cylinder head combustion surface
Piston, Piston ring
Left; exhaust valve
Right; inlet valve
Crank pin bearing
Features
Efficient combustion with smaller bore diameter
Introduction Specification Comparison
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Features
12
4.
Environmental Awareness
Low CO2 emission
1) NOx emission level well under the IMO NOx emission limit
2) Low CO2 emission due to low fuel consumption
3) Low noise and vibration

4) Measures taken to prevent fire accidents
By reducing fuel consumption, it has become possible to
reduce the emission of CO
2 from the engine
IMO NOx regulation
The graph shows the NOx emission regulation values set by IMO on September 1997.
500
5
10
15
20
1000 1500 2000
ENGINE     
ROTATIONAL SPEED
n(min
-1
)
NOx(g/kW
.
h)
NOx(g/kW・h)
=17 (n<=130min
-1
)
(130<n<=2000min
-1
)
(n>2000min
-1
)=9.8

=45
.
n
-0.2
IMO
DC-17
Termal efficienry(%)
680
660
640
620
600
580
560
540
40     41     42     43     44    45     46 
CO
2
Emissions(g/kWh)
Converntional Engine
New Engine
Introduction Specification Comparison
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13
5.
Compatibility with Electronic Commerce
For compatibility with leading marine-web systems and e-commerce, the
engine 3D CAD data can be supplied as Marine CAD / TRIBON data
6.
Simple Fresh Water Cooling System

Cooling water, L.O. pipeless design
Fresh water cooling system is simplified, requiring only one inlet and outlet
piping, reducing the work necessary for installation.
For improved combustion with heavy fuel oil at low load, 2-stage
intercooler system is used.
5~15m From crank center
Ø3
Ø5
5K-50
JIS
5K-15
JIS
Expansion tank
cooler
Fresh water
15A
50A
100A
25A
HT CW LINE
5
1
6
4
3
2
A
C
B
2STAGE INTERCOOLER

AIR VENT
& WARMING
OUTLETINLET
LT CW LINE
LO COOLER
Features
Introduction Specification Comparison
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14
7.
Integrated Engine Safety, Control, and Monitoring System (Option)
Benefits
1) Engine operation control possible from the engine itself
2) LCD display for monitoring various aspects and
parameters of operation, making high level engine
control possible
3) Sensor and wiring maintenance made easy by the use
of rail units
4) Exterior wiring incorporates digital communication for
reduced wiring
5) Remote monitoring possible from exterior connection
units
Features
Introduction Specification Comparison
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15
8.
Electronic fuel injection device (Option)
Further reduction in emission can be
achieved by the use of electronic fuel

injection device.
Injection timing and injection pattern can
be changed with the electronic fuel
injection device. By achieving optimal
adjustment, performance can be
improved.
Injection pattern
NOx (%)
Fuel Consumption be (%)
Electoronic
Fuel Injection
Mechanical
Pump
30%
10
5
-30 -20 -10 0 10 20 30
0
-5
-10
-15
Features
Introduction Specification Comparison
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16
9.
Required working hours for engine maintenance
10.
Maintenance interval and parts life
Hours Between Overhouls

Expected Service Life
Fuel injection valve
Cylinder liner
Intake valve
Exhaust valve
Piston
Crank pin bearing
Main bearing
2,000
12,000
12,000
12,000
12,000
12,000
16,000
8,000
60,000
36,000
24,000
60,000
24,000
32,000
hrs
Conventional New eng.
2
1
Hr.
2
1
Hr.

1
0.5
1
0.5
Hr.
Hr.
Removal and assembly of cylinder head
Piston removal and assembly after cylinder head removal
Features
Introduction Specification Comparison
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Benefits
17
1.
Reduction of operating cost
1) Low fuel Consumption (by 5 to 10 % compared to conventional engines)
2) Low L.O. consumption
3) Reduction of maintenance costs
4) High reliability and durability
2.
Easy assembly and disassembly
1) Simple pipeless design with fewer parts number
2) Efficient maintenance tools
3) Horizontally cut 3 piece connecting rods
4) Compact engine with compact major parts
3.
Easy regular maintenance
1) Inlet and exhaust gas piping mounted on the same side, allowing for easy maintenance of F.O. pump and
surrounding area
2) Auxiliary parts located in one area for easy maintenance

3) Governor and gauge board in the same area for easy adjustment
4) By installing the engine side electronic monitoring device and safety / control device, many parameters of the
engine can be monitored allowing for high level engine control
4.
Easy installation and operation
1) Fewer connection points for piping, and connection points located in a single area, allows for easier
installation
2) By installing the engine side electronic safety, control, and monitoring system, exterior automatic control panel
becomes unnecessary, and wiring for exterior control and monitoring is reduced
3) With the engine operating at 900min-1, the engine can be made compact, meaning less space is required for
installation
Introduction Specification Comparison
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18
Daihatsu Diesel's engines, gas engines, reduction
gears, gas turbines and other products are manu-
factured under excellent quality assurance systems
which conform to ISO 9001
The industry-leading quality assurance systems of Daihatsu Diesel's
Headquarters and Moriyama Works, covering every aspect of design,
development, manufacture and off-site maintenance—the first
manufacturer in this field in Japan to be accredited for this aspect —
are certified as satisfying the requirements of ISO 9001. As a result
all engines, gas turbines and marine-use equipment of Daihatsu
Diesel are manufactured under quality assurance systems that also
meet the requirements of EN ISO 9001, JIS Z9901 and BSEN ISO
9001. The compliance audit was performed by Lloyd's Register
Quality Assurance, Ltd.
ISO 9001 Accredited
Quality Accurance System Standerds of the International

Organization for Standardization
Conforming Sites : Head Office·Moriyama Factory
Introduction Specification Comparison
Our factory (in Moriyama city) acquired
ISO14001 certificate on Dec.2000