1. QSK38 Tier 4 Final OEM Impact Presentation
Mike Torzewski
Cummins Confidential – Restricted

2. Platform Overview Start of Production Base Engine / Performance
QSK38 Tier 4 Final, Start of Production – Q2 2018
Base Engine / Performance
Emissions Enablers
Selective Catalyst Reduction (SCR) exhaust aftertreatment
New MCRS fuel system with increased rail pressure capabilities
Fuel Ratings
Ratings from 1086 hp – 1600 hp
Maximum altitude capability consistent with current product
Fuel Economy
Combined fuel + DEF consumption same or less than current product fuel consumption
Packaging
Base engine weight will increase slightly, plus the weight of the aftertreatment hardware
Tier 2 ~ 4,842kg (10,675 lbs.) [est. wet]
Aftertreatment ~ 210 kg (463 lbs.) per SCR
Engine envelope will increase slightly due to wastegate architecture
NOTE: All references are made with respect to Tier 2 MCRS product

3. QSK38 Tier 4 Final Engine Characteristics
Configuration
D233043CX03
Displacement
37.7 liter (2,300 in3)
Bore
mm (6.25 in)
Stroke
Engine Weight
* 4,842kg (10,675 lbs.) [est. wet]
Aftertreatment Weight
** 420 kg (926 lbs.)
Cylinder Configuration
V - 12
* Based on Two Stage Beta engine weight
** Two SCR 4000 series canisters

4. QSK38 Tier 4 Final Engine Ratings
Rated Power hp rpm
Tier 2 Torque Peak lb-ft rpm
Rating Type
Product ID
SCR Configuration *
Restricted
OLGS
4000 Series *
Continuous
CONS
* Restricted rating. Approval required.

5. QSK38 T4 Final - Major Changes from Tier 2
Tier 4 System
QSK38
BLOCK & ATTACHMENTS
Re-Entrant Piston
Ring Pack
Breather/plumbing
LUBRICATION
Turbo Oil Supply/Drain Lines
Lube oil filter screen
ELECTRONINC CONTROLS
Harness
CM 2350 & Guard
NOx sensor
INTAKE SYSTEM
HE800/1000
CIT (Compressor Inlet Temp)
QSK38 T4 Final - Major Changes from Tier 2
FUEL SYSTEM
Fuel Pump & Injectors (2200 bar)*
HP & LP Fuel Lines
Stage 1 Fuel filter head / Filter
Stage 2 Fuel filter head / Filter
Fuel pump drive shaft adapter /
Fuel Inlet screen.
Exhaust System
Exhaust Manifold
Wastegate Valve
Transfer Tube
Bellows
Exhaust Collector
COOLING SYSTEM
Wastegate Coolant Plumbing
Turbo Coolant Plumbing
Black Font: Common parts
RED Font: Unique to QSK38

6. Mechanical Interface Impact (details on following slides)
Aftertreatment system addition
Aftertreatment canisters, DEF pumps, DEF tank, coolant lines, and electrical connections
Exhaust outlet / air inlet location change
OEM interface may move slightly due to taller overhead with wastegate architecture
Fuel cooler may be required for applications with high load factor and small fuel tank
Fuel & oil filtration changes
500 hour service intervals targeted
NOTE: All references are made with respect to Tier 2 MCRS product

7. Electrical Interface Impact (details on following slides)
Addition of aftertreatment connector to interface harness between engine and aftertreatment
OEM will need to add Compressor Inlet Temp sensor on intake plumbing
Increased current draw from engine & aftertreatment control modules may require larger alternator
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8. Changes by Subsystem

9. Air Handling
The QSK38 Tier 4 Final engine is only available in a Single Stage turbocharged configuration

10. Exhaust Outlet Connections
New for Tier 4, exhaust outlet connections will be offered as RC (engine-out) or XS (system-out) options
Tier 2 XS options have changed to RC options on Tier 4 due to new material requirements
RC options must be constructed from stainless steel material
Reference the OEM Design Guide on GCE for more information on material requirements
Tier 4 XS options will now consist of flange connections kits for the SCR outlet (system-out)

11. Air Intake
The OEM is required to mount a Compressor Inlet Temperature sensor (CIT) in the air intake plumbing prior to the turbo compressor inlet
New for Tier 4 Final
Similar to Tier 2, air cleaner options are not offered for the QSK38 Tier 4 Final engine

12. Aftertreatment Coolant Supply and Return Connection Points
The Diesel Exhaust Fluid (DEF) tank and supply module both require warmed engine jacket water coolant flow to thaw frozen DEF in cold ambient conditions
NOTE: Customers will no longer be able to utilize both water manifold ports for cabin heater coolant supply. One port MUST be used for DEF coolant supply
*Use AEB 24.58, “HHP Tier 4 Final Mobile Off-Hwy and Rail Aftertreatment Installation Requirements for Selective Catalytic Reduction (SCR)” for aftertreatment coolant supply requirements
**QSK50 shown for illustration purposes only. QSK38 T4F supply and return ports will be in similar locations on-engine

13. Water Inlet and Outlet Connections
Water inlet connections (WI options) remain the same for Tier 4 Final
A new water inlet option is being developed which will include an additional coolant port at the water pump inlet for the DEF coolant circuit return flow

14. Fuel System
A new high pressure MCRS fuel system has been developed for the QSK38 Tier 4 Final engine
Tier 4 Final engines require the use of Ultra-Low Sulfur Diesel (ULSD) fuel
*Reference Fuel Service Bulletin for further guidelines on appropriate fuels. Reference AEB “Fuel System Modular Common Rail System (MCRS) Application Guidelines” for more details on the fuel system
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15. (Standard for Tier 2/3/4 QSK38 MCRS)
Stage 1 Fuel Filtration
New Stage 1 fuel filtration with NanoNet filtration media will be used for Tier 4 Final. Space claim has changed as compared to current Stage 1 fuel filtration. Refer to CEAF for details on both the Tall Industrial Pro & Dual Tall Industrial Pro units
Triple Industrial Pro
(Obsolete design)
Tall Industrial Pro
(Standard for Tier 2/3/4 QSK38 MCRS)
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16. Stage 2 Fuel Filtration
The stage 2 filtration uses new filters with NanoNet™ filtration media
Due to improved filtration capability as well as an increase in filtration surface area, the Stage 2 fuel filter has changed from 3 canisters on Tier 2 to only 2 canisters on Tier 4 Final
On and off-engine options are available for the Stage 2 filter head
500 hour filtration intervals are targeted. Refer to the service manual for details
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17. Fuel Coolers
As a result of the increased rail pressure on Tier 4 Final engines, the heat rejection to fuel is approximately 2.5 times greater than on Tier 2 MCRS engines
Engines operating with a high load factor and small fuel tanks will likely require a fuel cooler with the increased heat rejection
This includes applications such as drills, and excavators
The heat rejection to fuel and maximum fuel inlet temperature requirements can be found on the fuel rating and base engine datasheets
Note: QSK38 T4F datasheets are not currently available on GCE
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18. Fuel System Connections
Fuel inlet and drain connection options are the same as previous MCRS engines
Restriction measurement ports are included on the connection blocks
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19. Lubrication System
The QSK38 Tier 4 Final offers two lubricating oil filtration systems:
Consists of 3 spin-on Fleetguard® oil filters
An oil sampling port will be offered on all lube filter heads for Tier 4 Final.
Mounting locations are similar to Tier 2 (left or right bank)
Utilizes the Eliminator™ Full-Flow/Centrifuge Bypass (Self-Cleaning) Filtration System
Eliminator mounting location is same as Tier 2 (right bank)
***Oil Sampling Port
*Reference service bulletin , “Cummins Engine Oil and Oil Analysis Recommendations”, is available on QSOL and contains recommendations and guidelines on the proper oils for Cummins engines
**All Tier 4 engines require the use of engine oils that meet American Petroleum Institute (API) CJ-4 standards. Reference service bulletin , “Cummins Engine Oil and Oil Analysis Recommendations”
***QSK50 T4F lube filter head shown for illustration

20. Pre-lubrication Prelube continues to be required for Tier 4 Final
The QSK38 Tier 4 Final engine utilizes the same prelube pump as Tier 2
Mounting locations are similar to Tier 2
Customer supplied prelube options continue to be offered but require chief engineer approval
*Reference AEB 44.02, “Prelub™ (Prelubrication Device) for QST30, K38/K50, QSK38/50 and QSK45/60/78 Engines”.

21. Electronic System
Electrical connection details will be highlighted in a separate training presentation

22. Electronic System
New connections have been added for aftertreatment. *Connector location is shown below.
*QSK50 T4F connections shown above. QSK38 T4F OEM connections will be very similar.

23. Alternator
The Tier 4 Final QSK38 engine is available with several different alternators (EE options). Many applications will require larger alternators for Tier 4 Final because of the additional power draw required for the aftertreatment system
Alternator options are likely to match Tier 2 offerings
EE option scope is still TBD
Additional information on aftertreatment power draw can be found in AEB 24.58, “HHP Tier 4 Mobile Off-Hwy and Rail Aftertreatment Installation Requirements for Selective Catalytic Reduction (SCR)”
Cummins Confidential - Restricted