Natural Gas Vehicle Conversions

Most of the NGVs on the road today are vehicle bi-fuel conversions which are gasoline-powered vehicles that have been adapted to run on natural gas. Bi-fuel conversions allow operators to drive on natural gas as the primary fuel and retain gasoline as a reserve fuel, simply by flicking a switch on the dashboard.

Ontario has a well developed set of codes and regulations for conversions and service. This helps ensure all installations and systems meet the highest standards. Each natural gas conversion is customized to ensure optimal vehicle performance. Converting your vehicle is as easy as phoning or visiting your local conversion centre.

In the Greater Toronto, Niagara and Eastern Ontario areas, conversions and service are performed by Enbridge Gas Distribution authorized conversion centres.

Add CNG Components

Existing gasoline-powered vehicles have Compressed Natural Gas (CNG) components added at a conversion centre, and natural gas then becomes the primary fuel used and gasoline becomes the back-up fuel.

Storage Cylinders

Storage cylinders are placed underneath vehicles like vans or pickup trucks, or in the trunk of vehicles like cabs and other cars. Stainless steel lines carry the fuel to a regulator (which reduces the pressure) in the engine compartment, then through a fuel-air mixer, and into the intake manifold to be introduced for combustion. There is a fuel selection switch (usually dash mounted) that allows the driver to manually select CNG or gasoline.

Bi-fuel System

This bi-fuel system allows the driver to have adequate fuel reserves in between natural gas fill-ups and actually extends the driving range over a comparable, gasoline-only vehicle. Fuel selection can be done while driving, idling or parked and when the natural gas fuel runs out, the engine automatically switches to gasoline use.

How is a vehicle converted to Natural Gas?

Compressed Natural Gas (CNG) enters the vehicle through the natural gas valve or receptacle (1) into high pressure cylinders (2).

When natural gas is required by the engine, it leaves the cylinders and passes through the master manual shut-off valve (3).

The gas enters the engine through the high pressure fuel line (4).

Gas enters the regulator (5), which reduces pressure from up to 3,000 psi (pounds per square inch) to about 100 psi.

The natural gas solenoid valve (6) allows natural gas to pass from the regulator into fuel injectors (7). The solenoid valve also shuts off the natural gas when the engine is not running.

Natural gas is injected into the intake manifold where it mixes with air and flows into the engine's combustion chambers.