Bajonett

Autogas is the common name for liquified petroleum gas when it is used as a fuel in internal combustion engines in vehicles. The same equipment is also used for similar engines in stationary applications such as generators.Autogas is widely used as a "green" fuel as it decreases exhaust emissions (less 20% CO2) . It has an octane rating (MON/RON) that is between 90 and 110 and an energy content (higher heating value—HHV) that is between 25.5 megajoules per litre (for pure propane) and 28.7 megajoules per litre (for pure  butane.)
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n. bayonet, knife attached to the muzzle of a rifle

bayonet

n bayonet