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QSG12 T4F Update
Craig Hetisimer, QSG12 TPL
Sept 17, 2014
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State-of-the-Art Engine Designed for Efficiency
Power: 335-460 Hp @ 2100 rpm
Torque: 1250 – 1700 ft-lbs
Lower weight than ISM
>600Nm REPTO Option
Compact Size for Ease of Installation
Reliability / Durability for T4F Market
Low Maintenance, Easy Service
Competitive Fuel Economy
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QSG Architecture, T4FNon-EGR + DOC/DPF + SCR/ASC
Ch
arg
e A
ir C
oo
ler
XPI Common Rail Fuel System
WGT
D
O
C
Diesel
Particulate
Filter
DEF Dosing
A
S
CSCR
Exhaust
Throttle
Key Features:
• No EGR for low system cost and reduced installation
impact
• DPF needed for particulate and particle count
• SCR for high SCR efficiency
• ASC needed for NH3 limit, legislated & internal
guidelines
• Exh Throttle needed for DPF and SCR Thermal
Management
• In-Cyl HC Dosing need for active DPF regeneration
• CF Direct Flow Air Filter for MAMBA Only
• UQS Sensor to meet EU DEF Quality legislation
In-Cyl
HC Dosing
ECM: cm2350
SCR Doser
Airless UL2
Exh Throttle
Borg Warner Butterfly
Valve
82.5mm Inlet
BLDC Actuator
Turbo: HE500WG
Comp:
D108N65TC for 520ps
K98K68RAU for < 520
Turbo: A84K83NAC16AG-W24
Direct Flow
Filter
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QSG12 T4F Aftertreatment Configurations
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Streamlined technology, efficient design
Cummins WGT
Ideal airflow improves
transient response and
productivity
High Pressure Common Rail
Proprietary XPI: Fuel efficient, clean burn
emissions, reduces engine noise
Engine Mounted ECM –
EPA/Euro VI, T4F:
CM2350 with integrated
AT controls – common
2017 controller
Rear Gear Train
Gears behind
flywheel housing
reduce noise
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Engine Weight Comparison
Cylinder block is optimized at
215 lb (98 kg) without
durability impact
Best in class weight enables:
• Higher Legal Payloads for More Productivity
• Improved Fuel Economy
• Shorter warmup time, cab heat/windshield defrost
*Varies by emissions level and option content
Unless noted, represents EPA model engines
Engine Dry Weight(lb) (kg)
ISL9 1695 770
ISG12 no-EGR for Euro* 1750-1890 795-860
ISG12 w/EGR for EPA 2050 930
ISM 2215 1005
ISX12 2640 1197
MAXXFORCE 13 2400 1089
Volvo D13 2519 1143
PACCAR MX 2640 1197
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402 mm489 mm
839 mm703 mm
370 mm 440 mm
457 mm509 mm
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1307 mm1295 mm
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System Architecture for Fuel Economy and Compact Packaging
New head design with best-in-class airflow
– Swirl balance and volumetric efficiency
– Ease of service, can remove cylinder head without removing overhead
Centrally positioned XPI top fed injectors
– Allows optimized intake ports and best in class vole
– Improves emissions and fuel consumption
Integrated Single Overhead camshaft
– Eliminates push-rods and keeps engine height low
– 4 camshaft support bearings to reduce friction
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Coolant Circuit Design for Fuel Economy
Fuel Economy Focus
– Best in class ∆P across cooler
– Oil thermostat bypasses the oil coolers
during warm up and light load to reduce
parasitic loss
– External bypass provides very low ∆P circuit
for efficiency and T-stat durability
Durability Focus
– Best in class cavitation resistance
– Component flow and velocity requirements
separated from radiator flow requirements
– Flexible architecture changes (add EGR,
add driveline retarder cooling, etc)
Pump and flow circuit design
reduces parasitic pumping
levels below 6L engines
ISG
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Best-in-class NVH Cylinder block
designed to maximize stiffness and minimize noise radiation
– Ribs to tie head bolts to mains
– Integrated oil return passages stiffen and isolate noise
– Shorter water jacket reduces noise transmission and greatly reduces cavitation
83.4
ISX12
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QSG12 Cold side
QSG12 unique
Intake Manifold
2350 ECM
Hydraulic
Drive adapter
Low Oil Fill
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QSG12 Hot Side
RO, FO, FO-WC
for higher
durability and
industrial QSG12
only applications
Exhaust Throttle
for thermal
management of
AT system
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Remote Lube & Fuel Filter QSG12 only
Remote
Lube
Remote
Fuel
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QSG 12 T4F Torque Curve Comparison
600
800
1000
1200
1400
1600
1800
600 800 1000 1200 1400 1600 1800 2000 2200
Net
To
rqu
e (
Lb-F
t)
Engine Speed (rpm)
QSG 12 T4F Torque Comparison
QSG12-D108 - Intermittent QSG12-K98 - Intermittent
QSG12-Low QSX11.9-Restricted
QSX11.9-Intermittent QSM11
Significant
increase in low
speed torque
Excellent transient
response
May allow
downspeeding
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QSG 12 T4F Power Curve Comparison
0
100
200
300
400
500
600
600 800 1000 1200 1400 1600 1800 2000 2200
Po
we
r (H
P)
Engine Speed (rpm)
QSG 12 T4F Power Comparison
QSG12-D108 - Intermittent QSG12-K98 - IntermittentQSG12-Low QSX11.9-RestrictedQSX11.9-Intermittent QSM11
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Transient Response ComparisonSignificant increase in low speed torque
Excellent transient response
May allow downspeeding
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Mamba Field Test and RAPID
Field Test
Field Test
Field Test
Field TestRAPID Test
RAPID Test
Field Test
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QSG 12 – T4F Summary
High Power to Weight Ratio
– Low Weight – 795-860 kg
– Improved low speed torque
– Improved transient response
Highly Modular Parts
– Ease of Maintenance
– Block and head designed for emissions flexibility
Architecture minimizes installation impacts
Great reliability coupled with easier service
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QUESTIONS?