Presented by Dave Ver Cauteren, Cummins NPower, on October 18, 2012 at the Wisconsin Clean Cities Odyssey Day event hosted by GAIN Clean Fuel.

1. Cummins Westport
The Natural Choice
Natural Gas and Vehicles
June 2012

2. Agenda
 Market Changes
 ISL-G, ISX12-G
– Technology
– Product features and benefits
– Differences – (CNG vs Diesel)
– Tech Specs / maintenance intervals / ratings
– Value Spec
– Availability
2

3. Heavy Duty Market – Primary Drivers
The market is moving….
Large oil and gas Truck OEMs and Fuel Fleets
producers Providers
oTesting NG vehicles
o Investing in LNG oExpanding product oLooking to innovate
production offering the business model
oBuilding infrastructure
Cummins Westport Confidential 3

4. Natural Gas is a Safe Fuel
CNG LNG Liquid fuels
 Lighter than air  Heavier than air
 Rises  Descends
 Doesn’t accumulate in low places  Accumulates in low places
 Rich mixture burns off slowly  Rich mixture explodes
 Ignites at temperatures of approx.  Gas and diesel vapors ignite at
600 C approx. 200 C
 Non toxic  Toxic, especially gasoline
 Odorless-detection fragrance is  Strong inherent odor
added  Evaporates slowly at room
 Evaporates quickly temperature

5. Why Cummins Westport Natural Gas Engines?
Environmental Leadership
 Meet Regulated 2010 EPA/CARB /Euro EEV
 Lower noise
 Lower greenhouse gas emissions
Performance The Natural Choice
 Experience  Cummins Factory built engines
 Delivered +35,000 engines  Cummins Factory Warranty
 +15,000 ISL G’s in service  Engineered for Performance
 Industry Leading Technology  VPI Engineering
 Powerful, Reliable and Durable  First fit OEM availability
 No hassle aftertreatment  Cummins Service Network
 Lower fuel costs  Parts, Service, Training Support
5

6. Cummins Westport Inc. (CWI)
A Joint Venture of Westport & Cummins
Cummins Inc.
50% 50%
Delivered over 34,000 engines.
2011 Revenue = $139M
New 10 year Agreement 2012 6

7. CWI Technology Path
Spark
Plug
O2 T O2
Sensor Sensor
Three Way
Catalyst
Charge Air Cooler EGR Cooler Stoich EGR
Spark Ignited Three Way
• Fuel and air are premixed Catalyst
outside the cylinder
Architecture
• Spark plug ignites the mixture
Fuel
• Air flow controls fuel flow
Throttle
• Air/Fuel ratio controls emissions
Cummins Westport Confidential 7

8. ISL G Product Features and Benefits
 8.9L Stoichiometric Cooled EGR engine with
spark ignition
 In production since mid-2007
 Low emissions
– 0.20 g/bhp-hr NOx
– 0.01 g/bhp-hr PM
 Three Way Catalyst Aftertreatment
 Diesel like Performance, Reliability
and Durability
– Same rated speed
– Similar torque curve
– Over 30% more torque at idle vs. lean burn
– Improved fuel economy of 5% vs. lean burn
 Over 80% parts commonality with ISL9
 Compatible with CNG, LNG, or Biomethane
(RNG) Renewable Natural Gas 8

9. What is the Same Between ISL9 & ISL G?
 Major Engine Components & Technology
– Block, crankshaft, main bearing, piston rods
– Over 80% parts commonality
– Cooled EGR
 500 hour Maintenance Interval
 Parts, Service, Training, Warranty
– Cummins Distributor Network
 320, 300, 280, 260 and 250 HP rating
 Compatible w/ Cummins Diagnostic Tools
– Insite
– QuickServe Online
9

10. What is Different Between ISL9 & ISL G?
Cylinder Head 2 Valve 4 Valve
Ignition Spark Ignition (spark plugs) Compression Ignition
Fuel System Intake Manifold Common Rail
Aftertreatment Three way catalyst Particulate Filter + SCR
Compression
12:1 16.6:1
Ratio
Cost of maintenance related to ignition and overhead valve
adjustments adds incremental maintenance cost for the ISL G
Maintenance Cost
versus ISL9. This cost is typically more than offset by fuel cost
savings with natural gas.
Natural gas engines require a specific oil that meets Cummins
Lubricating Oil
specification CES 20074
Noise Natural gas engines are up to 10db quieter at idle
10

11. Aftertreatment Comparison
SCR Catalyst Particulate Filter
ISL9
(diesel) Heated
DEF Tank
DEF ECM
Dosing
Control
Unit
Three Way Catalyst
ISL G Cummins TWC
(natural gas)
11

12. ISL G Maintenance Free Aftertreatment
 Three Way Catalyst
 Packaged as a muffler-vertical or horizontal mount
 Weighs approx 100 pounds
 Minimizes vehicle impact
 No regeneration or DEF required.

13. Maintenance – ISL G
 Maintenance is a key factor in engine life
 ISL G maintenance intervals are established by Cummins
Engineering and are based on engine family data.
 Key interval is oil drain, which is duty cycle dependant.
 The ISL G durability target for major engine components
(crankshaft, etc.) is the same as ISL
– B50 of 600K miles / 20,000 hours in typical on-highway
applications (30 mph average speed).
 However, not all engine components have the same life
expectation. In particular, the ISL G engine 2 valve cylinder
head
– Predicted B50 life of 325K miles (11,000 hours).

14. Intended Service Guidelines
 The ISL G operates in a variety of applications. Maintenance intervals as
published by Cummins are established based on vehicle applications and
average speed.
 Normal Duty is described as idle time less than 40%, the vehicle does not
operate in dusty areas, and GVW is not more than 65,000 pounds.
 Vehicles exceeding the published weight values as described in Cummins
AEB 140.21 require a Cummins application review.
ISL G Severe Duty Application Review
 Severe Duty is described as more than 40% idle time, expected annual
mileage in excess of 60,000 miles per year or weights in excess of 65,000
pounds
 Severe Duty requires special consideration on a case by case basis
– Severe duty may increase maintenance costs and engine life
 Each case must be specifically approved by CWI.

15. ISL G -Oil Drain Intervals

16. ISL G Maintenance Intervals - Truck
Eg: Truck application Hours Miles Kilometers Months
Check CAC cooler, piping
250 7500 12,000 3
and Air Cleaner
Oil & Filter* 500 15,000 24,000 6
Coolant Filter** None¹ None¹ None¹ None¹
Spin-on Fuel Filter 1,000 30,000 48,000 12
Spark Plugs 1,500 45,000 72,000 18
Standard Coolant 2,000 60,000 96,000 24
Overhead Adjustment*** 2,000 60,000 96,000 24
Air Cleaner/Element Follow vehicle manufacturers published recommendations
Default interval is the hours stated. Interval is whichever comes first – hours, miles or time.
Refer to Owners Manual for complete details on Maintenance Intervals.
¹ If engine is equipped with an optional coolant filter, it will need to be replaced at the same intervals as the oil filter. Regardless if
the engine is or is not equipped with a coolant filter, SCA/DCA additive levels must be checked according to the interval listed in
the Owners Manual.
*Assuming normal duty cycle/based on 30 mph average speed.
**Do not change if SCA above 3
***Initial Overhead Adjustment at 1,000 hours

17. Value Spec Example – No Funding
17

18. Additional NG Scheduled
Maintenance Cost
~$1,135/year
$0.01.1 per mile
(Spark Plugs and
Overhead Valves)

19. Comments
Natural gas (NG) trucks cost more
NG Fuel cost is $25,337/yr lower
No DEF required on ISL G
ISL G maintenance higher ($1,135 per year)
Save $21,090.97 per year, per truck
1.9 year Payback on Incremental Truck cost

20. ISL G: The Right Applications
 Medium Duty Market
– Refuse / Dump / Mixer
– Transit and School Bus
– Pickup and Delivery Truck
– Medium Duty Specialty Vehicles
(street sweeper, yard spotter, etc…)
 Heavy Duty Market
– Less Than Truck Load (LTL) applications
– Regional / Bulk Haul applications
20

21. ISL G Availability – Conventional Trucks
OEM Freightliner Peterbilt Kenworth Volvo Navistar
Model M2 – 112 320 T800SH VNM TranStar
SD - 114 384 W900S
365 T440
T470
Engine ISLG 320 ISL G 320 ISLG 320 ISL G 320 ISL G 320
ISL G 300
Application 6x4 Tractor Tractor Tractor Tractor Tractor
4x2 Tractor Vocational Vocational
4x2 Truck Mixer Mixer
6x2 Truck
Vocational
North America Truck Fleets
Cal Cartage, CA UPS Pac 9
Ryder Trucks Sysco Rush
Dillon Transport Pepsico Waste Management
Paper Transport Coca Cola 21

22. ISL G Availability – COE Trucks
OEM AutoCar Mack Peterbilt American Crane Carrier
Lafrance
Model Xpeditor TerraPro LE 320 Condor LET
Terra Pro CO
Fuel LNG/CNG LNG/CNG LNG/CNG LNG/CNG LNG/CNG
Engine ISLG 320 ISLG 320 ISL G 320 ISL G 320 ISLG 320
North America Refuse Fleets
. City of Los Angeles, CA City of Toronto Miller Waste, Ontario
Republic Service City of Sacramento, CA EMI, Quebec
Specialty Solid Waste Long Island, NY BFI / City of Surrey, BC
City of New York Smithtown, NY
Denver, CO Waste Management (USA,
Ogden, Utah Canada)
Violia Environmental

23. ISL G Availability – Transit Buses
OEM New Flyer NABI Orion ElDorado Gillig
Model 30/35/40 Low Floor 35/40 Low Floor Orion V HF EZ Rider II 30/35/40 Low
60 BRT Orion VII LF Floor
Fuel CNG CNG CNG LNG/CNG CNG
Engine ISLG 280 ISLG 280 ISL G 280 ISLG 280 ISLG 280
ISL G 320
Top North American CNG Transit Fleets
LAMTA, Los Angeles, CA OCTA, Orange County, CA Big Blue Bus, Santa Monica, CA
Boston, MA Washington DC Dallas, TX
TransLink, Vancouver, Canada NY / Long Island Transit, NY San Diego Transit, CA
Foothills Transit, CA RTC Transit, Las Vegas, NV HSR, Hamilton, Canada
Fort Worth, TX Santa Clara, CA
Tacoma, WA St. Louis, MO

24. ISX12 G
Heavy Duty Natural
Gas Engine
June 2012

25. ISX12 G
– Market and Platform Technology
– Features and Benefits
– Design and Technical Specs
– Product differences
– Ratings

26. Natural Gas Engine Introduction
 Target Markets
– Regional haul truck / tractor
– Vocational
– Refuse
 Platform & Technology
– Cummins 11.9 litre ISX12 diesel is base engine
– Utilizing spark-ignition with cooled EGR & three way catalyst (TWC)
• Same combustion technology as ISL G

27. Natural Gas Engine
 Key Product Attributes
– 4 cycle, spark ignited, in-line 6 cylinder, turbocharged, CAC
– Displacement – 11.9 litres (726.2 cu in)
– Peak rating: 400 hp, 1450 lb-ft
– EPA/CARB certified at or below EPA10 emission levels
– Dedicated natural gas engine
• Will operate on CNG or LNG
• Capable of using up to 100% Biomethane
– Three Way Catalyst after-treatment
– Engine braking
– Manual/Automatic Transmission capable
 Schedule
– Commercial launch: Early 2013
– Currently in field tests

28. Engine Architecture
ISL G ISX12 Diesel ISX12 G Natural Gas
CWI Emissions Architecture
– Spark Ignition Base Engine Architecture Heavy Duty Natural Gas
– Stoichiometric Combustion, – Diesel Base Engine – 400 hp/1,450 ft. lb torque
– Cooled EGR – 4 valve cylinder head – Heavy duty durability
– Three Way Catalyst – Cooled EGR – Heavy duty performance
– Wastegate Turbocharger
– Control System

29. Coil on Plug
Ignition
Design Architecture
EGR
Wastegate Valve
Turbo
Fuel
4 Valve Cylinder Module
Head
Ignition Control
Module
Engine Control
Module

30. ISX12 G -Technical Specifications
Advertised Horsepower 320-400 hp 239-298 kW
Peak Torque 1,150-1,450 lb-ft 1,559-1,966 N•m
Governed Speed 2100 rpm
Clutch Engagement Torque 700 lb-ft 949 N•m
Number of Cylinders 6
Oil System Capacity 12 U.S. gallons 45.4 liters
System Weight 2,750 lb 1,247 kg
Engine (Dry) 2,650 lb 1,202 kg
Aftertreatment System* 100 lb 45 kg
*Three Way Catalyst Aftertreatment (packaged as a muffler)
Cummins Westport Confidential 30

31. ISX12 G Features
Coil on Plug Ignition Spark
Plug
ISX12 G Coil and
Extension ISX12 G Spark Plug
Spark Ignited
 Air flow controls fuel flow
 Air/Fuel ratio controls emissions
 Fuel and air are premixed Fuel Flexibility
outside the cylinder
 Spark plug ignites the mixture

32. ISX12 G Features
Coil on Plug Ignition Three Way Catalyst
ISX12 G Coil and
Extension ISX12 G Spark Plug
Fuel Flexibility
32

33. ISX12 vs. ISX12 G
ISX12 ISX12 G
Horsepower 310 – 425 hp (231 – 317 kW) 320 – 400 hp (239 – 298 kW)
Peak Torque 1150 – 1650 lb-ft (1559 – 2237 Nm) 1150 – 1450 lb-ft (1559 – 1966 Nm)
Torque at Idle 800 lb-ft (1085Nm) 700 lb-ft (949 Nm)
Aftertreatment DPF + SCR Three Way Catalyst
Engine Brake Optional 380 hp (283 kW) @ 2100 Optional 240 hp (179 kW) @ 2100 rpm
Performance rpm

34. 2013 ISX12 G Ratings *
PEAK TORQUE
ENGINE MODEL ADVERTISED HP(KW) GOVERNED SPEED
LB-FT (Nm) @ RPM
Line Haul Truck Applications
ISX12 G 400 400 (298) 1450 (1966) @ 1200 2100 RPM
ISX12 G 385 385 (287) 1350 (1830) @ 1200 2100 RPM
ISX12 G 350 350 (261) 1450 (1966) @ 1200 2100 RPM
ISX12 G 330 330 (246) 1250 (1695) @ 1200 2100 RPM
ISX12 G 320 320 (239) 1150 (1559) @ 1200 2100 RPM
Refuse Truck Applications
ISX12 G 350R 350 (261) 1350 (1830) @ 1200 2100 RPM
ISX12 G 350R 350 (261) 1450 (1966) @ 1200 2100 RPM
ISX12 G 330R 330 (246) 1250 (1695) @ 1200 2100 RPM
ISX12 G 320R 320 (239) 1150 (1559) @ 1200 2100 RPM
Clutch Engagement Torque – 700 LB-FT (949 Nm)
Net Weight (Dry) - 2650 LB (1202 KG)
* Preliminary Ratings – Subject to Change

35. Similar Ratings
 Power and torque curves similar to ISX12 diesel
ISX12 G 320 / 1150 FR20300
ISX12 G 330 / 1250 FR20298
ISX12 G 385 / 1350 FR20290
ISX12 G 350 / 1450 FR20296
ISX12 G 400 / 1450 FR20288

36. Program Status Update – October 2012
 25 truck field test trucks in operation.
– Initial performance feedback has been excellent
– Initial Quality Assurance (IQA) process with launch OEM
is underway
– Performance and fuel economy optimization continues.
 Limited engine production remains on schedule to start
in early 2013
– Working with OEM re 2013 truck delivery schedules
 Full Production expected mid 2013
36

37. Service Guidelines
 GCVW limitations for the ISX12 G have yet to be finalized, the
ISX12 diesel is unlimited but does have higher ratings (425/1650).
 Investigations and analysis of GCVW in excess of 100,000 lbs is in
process.
ISX12 PowerSpec example (85-110,000 lbs)
Cummins Westport Confidential 37

38. ISX12 G Warranty
 Automotive Base warranty for Cummins Westport natural gas engines is
same as Cummins diesel base platform
 2 Year / 250,000 Mile Warranty
– 100% parts and labor on warrantable failures*
– Travel or towing when an engine is disabled by a warrantable failure
– Consumables not reusable due to covered failure
– Limited progressive damage, including aftertreatment
 Extended Coverage options are yet to be determined, and will be
published prior to launch.
Maintenance Intervals
 ISX12 G intervals have not been finalized.
 Expect natural gas related intervals will be similar to ISL G
 Example: spark plug interval at 1,500 hours
 CES20074 natural gas engine oil will be required

39. OEM Launch Partners
39

40. ISX12 G OEM MATS Displays
Freightliner Cascadia (CNG) Peterbilt 365 (LNG)
Volvo VNL (CNG) Kenworth T660 (CNG)

41. OEM Availability - Summary
Nor t h Am er ica
OEM Model Segment I SL G I SX12 G Comm ent s
App licat ion s: 6 X4 Tract o r (LNG, CNG),
Freightliner Truck Business Class M2 112 (Class 7/8) MD/ HD Truck X CNG - 4 X2 Tract o r, 6 X2 , 4 X2 Tru ck,
Vo cat io n al
Cascadia HD Truck X I SX12 G - Mid 2013
Kenworth W900S MD/ HD Truck X X Vocat ional/ Mixer
T440 / T470 MD/ HD Truck X Local & r egional haul, v ocat ional.
T660 HD Truck X I SX12 G - Mid 2013
Peterbilt Model 384 MD/ HD Truck X X Model 384 - Tr act or
Model 365 MD/ HD Truck X X I SX12 G - Mid 2013
Volvo VNM MD/ HD Truck X
VNL HD Truck X I SX12 G - Mid 2013
Mack Pinnacle HD Truck X I SX12 G - Mid 2013
Granite HD Truck X I SX12 G - Mid 2013
International TranStar MD/ HD Truck X New 2012
American LaFrance Condor Refuse X
AutoCar ACX Refuse X X I SX12 G - Mid 2013
Crane Carrier LCF Refuse X
Peterbilt 320 Refuse X X I SX12 G - Mid 2013
Mack TerraPro Low Entry Refuse X
Mack TerraPro Cab Over Refuse X
NABI 35 LFW/ 40 LFW/ 60 BRT Urban Bus X
New Flyer 30 LF/ 35 LF/ 40 LF Urban Bus X
Orion Orion V HF/ Orion VII LF Urban Bus X
Foton City - L40 CNG Urban Bus X
Gillig LF Urban Bus X New 2011
MCI Commuter Coach 40/ 45 Motor Coach X New 2011
DesignLine Commuter Coach 40/ 45 Motor Coach X New 2012
El Dorado National Axess/ E-Z Rider II/Transmark RE/ XHF Shuttle X
Blue Bird All American School Bus X
Thomas Bus Saf-T Liner School Bus X
Capacity TJ9000 , TJ5000 Yard Spotter X
AutoCar Xspotter Yard Spotter X
June, 2012

42. www.cumminswestport.com
■ New Website launched May 15, 2012
■ Great source of information about natural gas engines and vehicles.
■ Features the Natural Gas Academy, a series of instructional videos
■ Designed to provide a general overview of natural gas as a fuel
whether it is compressed (CNG) or liquefied (LNG), and how it is
used with vehicles.

43. Thank You