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Natural Gas Vehicles

Benefits of Natural Gas Vehicles

  • Econmical
    • Natural gas can reduce fuel costs significantly versus diesel or gasoline, extend engine life and reduce the frequency of oil changes.
  • Safe
    • Since natural gas is lighter than air, a leak will not pool on the ground like gasoline.
    • Compressed Natural Gas (CNG) cylinders are also much stronger than gasoline tanks.
  • Environmentally responsible
    Pollutant Emissions Reduction for
    Light & Medium Duty
    Compared to Gasoline
    Emissions Reduction
    for Heavy Duty Vehicles
    to Diesel
    Carbon Dioxide 25% Up to 25%
    Carbon Monoxide 90 - 97% 75%
    Nitrogen Oxides 35 – 60% At least 50%
    Potentially 50 – 75% At least 50%
    Particulate Matter Nearly 100% 50%
    Evaporative Emissions 100%
    Source: NGV America
  • Energy security
    • Due to its abundant supply, natural gas will last for more than 100 years. Fortunately, natural gas is also a domestic source of energy, more than 90% is produced in North America.

How Natural Gas Vehicles Work

  1. Compressed Natural Gas (CNG) enters the vehicle through the natural gas fuel receptacle.
  2. The CNG flows into high-pressure storage cylinders.
  3. When natural gas is required by the engine, CNG leaves the cylinders and passes through the cylinder valve.
  4. The gas goes through the high-pressure fuel line and enters the engine compartment.
  5. Gas enters the regulator, which reduces pressure from up to 3,600 psi to the pressure required to open the fuel injectors.
  6. The solenoid valve allows natural gas to pass from the regulator into the fuel injectors. (The solenoid valve will also shut off the natural gas when the engine is not running.)
  7. Natural gas mixes with air, then flows down through the fuel injection system and enters the engine's combustion chambers.

Which Vehicle is Right for Your Company?

Light Duty Medium Duty Heavy Duty
Weight (pounds) Less than 10,000 10,000 – 33,000 More than 33,000
Class 1 – 2 3 - 7 8
Examples - Passenger cars
- Taxi cars
- Service vans
- Short haul delivery trucks
- Transit and shuttle buses
- Transit, shuttle and school buses
- Long haul tractor/trailer trucks
- Garbage trucks
Current Incremental Cost
(more than comparable
$7,000 - $14,000 $15,000 - $20,000 $25,000 or more

Use an Existing Station or Build Your Own

  • Use an Existing Station
    • The number of public CNG fueling stations is growing every year and provides an ever-expanding source of fueling options.
  • Build Your Own
    • There are two types of refueling stations: time-fill and fast-fill. Each includes a utility gas meter, natural gas piping system, compressor and dispenser.
Time-fill Fast-fill
How it works CNG is dispensed slowly from a
compressor to the onboard storage
tank. This eliminates the need
for a high-pressure storage system.
It has the same fill rates and
times as a liquid fueling station.The
vehicle receives natural gas directly from a storage system. A compressor replenishes the storage system.
Best for Fleets that return toa central location
and sit idle overnight or for extended periods.
Public access. It is
also ideal for larger fleets with
short fueling turnaround time.
Typical fueling time 6 – 8 hours 3 – 7 minutes
Typical cost Approximately $15,000 - $500,000 Approximately $500,000 - $1,500,000
  • If you decide to install your own equipment, National Fuel offers several different rate options. These include a Natural Gas Vehicle Rate, standard sales service or transportation service. For more detail, see our Rates page.

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