Peterbilt MotorsPeterbilt MotorsModel 320 Hydraulic Model 320 Hydraulic

Launch AssistLaunch Assist

Natural Gas BenefitsNatural Gas Benefits

• Good near term solution for lower Good near term solution for lower emissions, but for only a couple years emissions, but for only a couple years (2010)(2010)

• Landfill’s have the ability to produce own Landfill’s have the ability to produce own fuelfuel

• Reduces demand for foreign oilReduces demand for foreign oil

Peterbilt / Cummins Peterbilt / Cummins Westport LNG TrucksWestport LNG Trucks

Natural Gas ChallengesNatural Gas Challenges

• Lower energy density requires numerous Lower energy density requires numerous CNG or expensive LNG tanksCNG or expensive LNG tanks

• Lower acceleration vs. horsepowerLower acceleration vs. horsepower

• Extensive infrastructure for deliveryExtensive infrastructure for delivery

• Special provisions for servicingSpecial provisions for servicing

• Higher initial procurement and Higher initial procurement and maintenance costmaintenance cost

LNG Refueling LNG Refueling StationStation

Emissions ReductionEmissions Reduction

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0 1 2 3 4 5 6 7

NOX (g/kWh)

Particulates (g/kWh)

19911991

199419941998199820022002

2007200720102010

By 2010 Diesel Engines will be as

clean as natural gas

By 2010 Diesel Engines will be as

clean as natural gas

HLA BenefitsHLA Benefits• Reduces emissions by launching the vehicle Reduces emissions by launching the vehicle

using pure hydraulic or blended powerusing pure hydraulic or blended power

• Regenerative braking reduces brake wearRegenerative braking reduces brake wear– Lower maintenance costLower maintenance cost

– Reduces particulate matter emissions Reduces particulate matter emissions from brake dust.from brake dust.

• Improved fuel economy reduces demand for Improved fuel economy reduces demand for foreign oilforeign oil

• Technology and trucks developed in Technology and trucks developed in Denton, TexasDenton, Texas

How does the HLA System work?How does the HLA System work?How does the HLA System work?How does the HLA System work?

Regeneration ModeDuring braking, the vehicle’s kinetic energy drives the pump/motor as a pump, transferring hydraulic fluid from the low pressure reservoir to the high pressure accumulator. The fluid compresses nitrogen gas in the accumulator and pressurizes the system.

Launch Assist ModeDuring acceleration, fluid in the high pressure accumulator is metered out to drive the pump/motor as a motor. The system propels the vehicle by transmitting torque to the driveshaft.

Transfer caseTransfer case

Pump/MotorPump/MotorReservoirReservoir

FilterFilter

High-pressureHigh-pressureaccumulatoraccumulator

Drive shaft Drive shaft CouplingCoupling

Hydraulic Launch System Hydraulic Launch System Hydraulic Launch System Hydraulic Launch System

380 Horsepower380 Horsepower

2550 Ft-lbs Torque2550 Ft-lbs Torque

Test DataTest Data

• Peterbilt 320 chassis • 63,000lb ( 28.5 Tonne ) GVW • CAT C-10 315 hp engine • Allison 4560 5-speed automatic transmission• 100 feet ( 30 metres ) between stops• ABS braking system

Fleet TrialFleet Trial

• Houston Advanced Research CenterHouston Advanced Research Center

• 12 Truck Fleet Evaluation12 Truck Fleet Evaluation

• CustomersCustomers– Waste Management (4)Waste Management (4)

– City of Houston (2)City of Houston (2)

– City of Denver, CO (1)City of Denver, CO (1)

– City of Dallas (4)City of Dallas (4)

– City of Denton (1)City of Denton (1)