Gas tank arrangement

A gas tank arrangement for an internal combustion engine, said gas tank arrangement comprising a gas tank for containing a combustible gas, and an additional gas tank arranged in upstream fluid communication with said internal combustion engine, wherein the gas tank arrangement further comprises a valve arrangement positioned in fluid communication with the internal combustion engine, said valve arrangement being further arranged in upstream fluid communication with the gas tank and the additional gas tank for controllably directing combustible gas from the internal combustion engine to either the gas tank or the additional gas tank, wherein the valve arrangement is controllable between a first state in which combustible gas from the internal combustion engine is directed to the gas tank and a second state in which combustible gas from the internal combustion engine is directed to the additional gas tank, and wherein the valve arrangement is controllable to be switched from the first state to the second state when a pressure level of the combustible gas from the internal combustion engine exceeds a predetermined threshold limit at the valve arrangement.