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About CNG About NGVs NGV Safety Benefits Fleet Info Our Station Conversion


About Natural Gas Vehicles (NGV)

 A Natural Gas Vehicle is a car, truck, or other vehicle that uses natural gas for fuel. Using natural gas instead of gasoline or diesel is a low-cost, 

low-emissions solution for reducing our nation’s dependence on foreign energy while also reducing greenhouse gases and urban smog.

 With proven reserves of domestic natural gas soaring and our dependence on foreign oil as burdensome as ever, it makes sense to expand

the use of clean, inexpensive, and abundant natural gas as a vehicle fuel. Natural gas vehicles (NGVs) are good for our economy and our environment.


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This logo is on every NGV that uses CNG.

Types of NGVs

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Bi-fuel vehicles- run on both gasoline and natural gas. These vehicles can switch seamlessly between the two fuels.

Dual-fuel vehicles—powered by natural gas and diesel fuels. Both fuels are burned together at the same time.

Dedicated vehicles—fueled solely by natural gas.

CNG Flow Structure

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NGVs vs. gasoline/diesel

 NGVs operate on the same basic principles as gasoline-powered vehicles. When the engine in

an NGV is started, natural gas flows from the storage cylinders into a fuel line. Near the engine,

the natural gas enters a regulator to reduce the pressure. Then the gas feeds through a gaseous fuel-injection system, which introduces the fuel into the cylinders. Sensors and computers adjust

the fuel-air mixture so that when a spark plug ignites the gas, it burns efficiently and clean.

 Since natural gas is a gas rather than a liquid at standard pressure and temperature,

some modifications are required to make an NGV work efficiently. These changes are primarily

in the fuel storage tank, fueling receptacle/nozzle and the engine. The specially designed tanks that contain the CNG onboard the vehicle weigh more and take up more space than gasoline or diesel containers.

  • There are about 142,000 NGVs on U.S. roads today and more than 15.2 million worldwide.

  • There are about 1,325 NGV fueling stations in the U.S., and refueling appliances are available for home use.

  • In the U.S., about 50 different manufacturers produce 100 models of light-, medium-, and heavy-duty vehicles and engines.

  • Natural gas currently costs from $1.50 to $2.00 less per gasoline gallon equivalent (GGE).

  • In the U.S. alone, NGVs offset the use of about 400 million gallons of gasoline in 2013.

  • NGVs meet the strictest emission standards, including California’s AT-PZEV standard.

  • NGVs are as safe as or safer than traditional gasoline or diesel vehicles.

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What kinds of vehicles use natural gas?

Natural gas vehicles are available in all classes of vehicle. These vehicles are available either from an original equipment manufacturer or from a small volume manufacturer that converts the vehicle to

run on natural gas. The vehicles converted by these small volume manufacturers must meet all government safety and emissions requirements.  These vehicles range from

the light-duty Honda Civic GX to heavy duty buses, refuse trucks, and 18-wheelers. 


Are these dedicated or bi-fuel vehicles?

It depends on the specific vehicle and the choice

of the manufacturer. Bi-fuel vehicles require additional storage to accommodate both fuels.

How long does it take to fuel a natural gas vehicle?

There are two types of fueling equipment for CNG vehicles – fast-fill and time-fill.

 In fast-fill, the combination of a large compressor coupled with a high-pressure storage tank system, called a cascade, fills the tank in about the same amount of time

it takes to fuel an average gasoline vehicle.

  A time-fill system does not have a storage system and has a much smaller --and less expensive-- compressor. It typically refuels CNG vehicles overnight at a rate of about one gallon per hour. Time fill works for vehicles that remain idle overnight, such as refuse trucks and school buses.

 There are also home refueling options for individuals that own a CNG powered vehicle and are looking for the convenience of being able to fuel at home. The units connect to

a residential gas line and are typically hung on a garage wall, and can fuel a single vehicle at slightly less than a half a gallon per hour.



How do you fuel a natural gas vehicle?

 It is very similar to the way you fuel any car

or truck. The dispenser looks about the same,

but the nozzle is different. Drivers can be easily educated on how to fill a CNG vehicle. Because natural gas is under pressure, the storage systems must be designed so that no fuel escapes when the vehicle is being fueled. Natural gas nozzles lock onto the receptacles and form a leak-free seal, similar to the coupling on an air compressor nozzle. The receptacles are designed so that when the nozzle is removed the gas is prevented from escaping.

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An example of a pump nozzle.

How is the fuel stored in the vehicle?

 Most NGVs operate on compressed natural gas so the fuel takes up less space. CNG is stored on board vehicles under high-pressure (3,000-3,600 pounds per square inch) in tube-shaped cylinders that are attached to the rear, top, or undercarriage of the vehicle.

 The cylinders meet very rigorous safety standards. They are made of high-strength materials designed to withstand impact, puncture and, in the case of fire, their pressure relief devices (PRDs) provide 

a controlled venting of the gas rather than letting the pressure build up in the tank.


Are natural gas vehicles safe?

Yes, absolutely. Compressed natural gas is stored on board vehicles in tanks that meet the most stringent safety standards in the world. Some of the tests that these tanks must pass are the drop test, the bonfire test, and the gunshot test.






YCNGA Public CNG Station 

975 W Main St, Rock Hill SC 29730




Open 24/7


3,600 PSI


Accepted payment types: Visa, MasterCard, Discover, American Express, Voyager, WEX, and FuelMan 


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