A compressed natural gas (CNG) fuel system is the complete setup that allows vehicles to run on natural gas instead of gasoline or diesel. It includes storage cylinders that safely hold natural gas at high pressure, fuel lines and regulators that control flow, and a delivery system that supplies clean-burning CNG to the engine. Together, these components make it possible for fleets to operate more cost-effectively while reducing harmful emissions.
At American CNG, we specialize in designing and manufacturing both the cylinders and the full fuel system configurations that fleets depend on. Our systems are available in multiple layouts—side mount, roof mount, tailgate, back-of-cab, and transit/underbody—so they can be tailored to the unique needs of each vehicle and fleet application. Every design is engineered for maximum safety, strength, and efficiency, ensuring long-term durability even in demanding environments.
To further simplify operations, our systems can be equipped with our Fuel Management Module (FMM). This module consolidates key functions into one streamlined component, reducing complexity for installers and giving operators better control over system performance.
By combining proven cylinder manufacturing expertise with complete fuel system solutions, American CNG helps fleets cut fuel costs, lower emissions, and confidently transition to cleaner, more sustainable energy.
Compressed Natural Gas (CNG) fuel systems offer a cleaner, eco-friendly alternative to gasoline and diesel. CNG reduces emissions, lowers fuel costs, and requires less maintenance due to its cleaner combustion. Widely used in fleets and personal vehicles, CNG is a reliable and sustainable choice that continues to evolve with advancements in technology.
The Fuel Management Module (FMM) is a compact unit that integrates key components such as regulators, valves, and safety devices into a single streamlined system. By consolidating multiple functions, the FMM reduces installation time, minimizes potential leak points, and simplifies service and troubleshooting. For fleet operators, this means improved reliability, greater operational control, and reduced downtime over the life of the system. With safety and efficiency built in, the FMM is a critical component that enhances the overall performance of every American CNG fuel system.
Side mount systems position CNG cylinders along the vehicle’s frame rails, typically on medium- and heavy-duty trucks. This layout maximizes available storage space without encroaching on the bed or cargo area, which makes it a flexible option for fleets that need to maintain full load capacity. Side mounts also provide excellent weight distribution and stability while allowing straightforward access for inspections and maintenance. Their versatility and efficiency make them one of the most widely adopted configurations in the industry.
Roof mount systems secure cylinders above the vehicle, most commonly on buses, vocational trucks, and specialty vehicles with adequate clearance. By storing CNG overhead, these systems preserve underbody and cargo space while enabling greater fuel capacity and range. This configuration is especially valuable for transit fleets that require long daily operating hours without frequent refueling. Designed with protective enclosures and secure mounting, roof systems provide both durability and safety in challenging environments.
Back-of-cab systems place fuel cylinders directly behind the cab of a truck or tractor, utilizing vertical space to achieve substantial storage capacity. This layout integrates seamlessly with tractors pulling trailers, keeping the vehicle streamlined while supporting long-haul operations. Back-of-cab systems are engineered to minimize aerodynamic drag and preserve turning radius, making them ideal for over-the-road fleets. Their design prioritizes both operator safety and efficient fueling, ensuring dependable performance on long routes.
Tailgate systems mount the CNG cylinders at the rear of the vehicle in a reinforced housing. This design is ideal when side or roof space is limited but rear clearance is available, making it a strong fit for refuse trucks and vocational applications. Tailgate systems offer high fuel capacity in a compact footprint and are engineered to maintain full vehicle functionality. With easy rear access for fueling and service, they balance practicality with performance.
Transit and underbody systems mount cylinders beneath the floor of a bus or large vehicle, keeping them hidden from view while maintaining passenger and cargo space. This low-profile configuration helps maintain a lower center of gravity for improved vehicle handling and stability. Heavy-duty shielding and reinforced brackets protect the cylinders from road hazards and debris, making them well-suited for demanding transit environments. By maximizing space efficiency and safety, underbody systems are a proven choice for public transportation fleets.