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Compressed natural gas (CNG) is a fuel gas mainly composed of methane (CH 4), compressed to less than 1% of the volume it occupies at standard atmospheric pressure.It is stored and distributed in hard containers at a pressure of 20–25 megapascals (2,900–3,600 psi; 200–250 bar), usually in cylindrical or spherical shapes.
The air engine is an emission-free piston engine that uses compressed air as a source of energy. The first compressed air car was invented by a French engineer named Guy Nègre . The expansion of compressed air may be used to drive the pistons in a modified piston engine.
Currently (as of 2019 production), the Gillig Low Floor range is equipped with three engines: the Cummins B6.7 diesel, Cummins L9 diesel, and Cummins L9N compressed natural gas inline-six engines. Throughout its production, the Gillig Low Floor has featured a range of Cummins engines along with Caterpillar and Detroit Diesel engines.
Methane, the main component of natural gas, has an autoignition temperature of 580 °C, [48] whereas gasoline and diesel autoignite at approximately 250 °C and 210 °C respectively. With a compressed natural gas (CNG) engine, the mixing of the fuel and the air is more effective since gases typically mix well in a short period of time.
Because natural gas emits less smog-forming pollutants than other fossil fuels when combusted, cleaner air has been measured in urban localities switching to natural gas vehicles. [65] Tailpipe CO 2 can be reduced by 15–25% compared to gasoline, diesel. [66] The greatest reductions occur in medium and heavy duty, light duty and refuse truck ...
The Cummins L10 also has a sister engine which runs on compressed natural gas (CNG). [2] The engine was introduced in 1992 as the L10G before being replaced by the L Gas Plus in 2001 until it became the ISL G in collaboration with Westport Innovations in 2008, now based on the C-series engine architecture.
The LR is available with a Mack MP7 diesel, Cummins Westport natural gas engine, and since 2020, an all-electric drivetrain. [3] [4] The Mack MP7 is the base engine in the LR. It is a 659 cubic inches (10.8 L) overhead cam turbocharged inline six-cylinder diesel engine. It develops 325 to 425 horsepower (242 to 317 kW) and 1,260 to 1,560 pound ...
Download as PDF; Printable version; In other projects ... Compressed Natural Gas (CNG) Electric; Dimensions; Wheelbase: 158–279″ ... Natural Gas: DriveForce 8.0L ...