NITROGEN TIRE PRESSUREMAINTENANCE PROGRAM

FOR GOVERNMENT FLEET EXPO

Why Use Nitrogen?Why Use Nitrogen?

40% of passenger cars and 45% of trucks/suv/vans have at least one tire that is under inflated by 6% (National Highway Transportation Safety Commission)

As many as 85% of motorists do not check their tire pressure properly. (Rubber Manufacturers Association, February 2003 Survey)

The Problem is Under InflationThe Problem is Under Inflation

Why Use Nitrogen?Why Use Nitrogen?

US can save 4 MM gal/day of gas by properly inflating US can save 4 MM gal/day of gas by properly inflating tirestires- US Department of Energy- US Department of Energy

Improve gas mileage by around 3.3 percent by keeping Improve gas mileage by around 3.3 percent by keeping tires inflated to the proper pressuretires inflated to the proper pressure- DOE & EPA website- DOE & EPA website

Fuel efficiency reduced by ~1% for every 3 psi of under Fuel efficiency reduced by ~1% for every 3 psi of under inflationinflation- NHTSA- NHTSA

About 90% of tire failures causing tire road debris is About 90% of tire failures causing tire road debris is caused by underinflation caused by underinflation - TMC Tire Air Pressure Study, May 2002- TMC Tire Air Pressure Study, May 2002

Under Inflation Causes Energy & Safety IssuesUnder Inflation Causes Energy & Safety Issues

Fact : NFact : N22 Permeates Slower Permeates SlowerRetains Tire Pressure LongerRetains Tire Pressure Longer

Oxygen leakage rate is 4 times that of Nitrogen

N2 Permeability (cm3 STP-cm/(cm2-sec-cm Hg)): 0.32E-10

O2 Permeability (cm3 STP-cm/(cm2-sec-cm Hg)): 1.3E-10

TireInside

Nitrogen Molecules

Oxygen Molecules

Tire Rubber WallTireOutside

What Can Nitrogen Do For Your Fleet?What Can Nitrogen Do For Your Fleet?

Improves fuel efficiency by 2 - 6%Improves fuel efficiency by 2 - 6%

Lowers Carbon emissions 20 lbs/gal. of fuelLowers Carbon emissions 20 lbs/gal. of fuel

Lowers annual tire expense by 20%Lowers annual tire expense by 20%

Improves fleet safetyImproves fleet safety

Low investment / High returnLow investment / High return

Nitrogen & Federal Block Nitrogen & Federal Block GrantGrant

Energy Efficiency & Energy Efficiency & Cleaner Cleaner EnvironmentEnvironment

Reduce Fuel ConsumptionReduce Fuel Consumption Reduce Smog EmissionsReduce Smog Emissions Reduce Greenhouse GasesReduce Greenhouse Gases Reduce pressure on our Reduce pressure on our

landfillslandfills

Annual Benefits based on 3 months of actual field data

Fuel Savings 75,600 gal $ 302,400

Tire Savings 50 tires $ 20,800

CO2 Reduction 1,512,000 lbs ???

Fleet : 285 buses

Mileage25,000

miles/year

Fuel cost @ $4.00/gal

2.5% savings

Tire life3 years

10% less wear

Tires $..../mile

(not shared)

CO2 Reductio

n22 lbs/gal

Gas Savings: http://www.fueleconomy.gov/feg/maintain.shtmlTire life: http://www.bridgestonetrucktires.com/us_eng/real/magazines/03v8iss3/ra8.aspCO2 Reduction: http://www.epa.gov/otaq/consumer/f00013.htm

Projected EconomicsProjected EconomicsNYC Transit – “Flatbush Depot”NYC Transit – “Flatbush Depot”

PurigeN98 System PurigeN98 System OperationOperation Converting from Air Converting from Air

to Nitrogento Nitrogen

PurigeN98 Generator Tire Machines

Nitrogen Supply Header Nitrogen Hose / Bay

Advantage: PurigeN98 service available in all bays & tire machines

Whole Shop InstallationWhole Shop InstallationMultiple Bays & Tire MachinesMultiple Bays & Tire Machines

THANK YOU!