Aircraft comprising: - a combustion engine comprising - a combustion chamber, - an injection device comprising a fuel intake and adapted to inject fuel in the combustion chamber upon supply of fuel at its fuel intake, - an air separation device, comprising: • an air intake adapted to intake an original gas mix comprising at least oxygen and nitrogen, • an oxygen output at which said air separation device is adapted to output an oxygen-enriched gas mix comprising an oxygen content higher than an oxygen content of the original gas mix upon introduction of an original gas mix at the air intake, and • a nitrogen output at which said air separation device is adapted to output a nitrogen-enriched gas mix comprising a nitrogen content higher than a nitrogen content of the original gas mix upon introduction of an original gas mix at the air intake, - an inerting circuit, - a fuel pipe to transport fuel or a mix comprising fuel, in which: - the nitrogen output of the air separation device is hydraulically connected to the inerting circuit, - the oxygen output of the air separation device is hydraulically connected to the injection device, and characterized in that the inerting circuit is hydraulically connected to a peripheral channel around the fuel pipe. - a combustion engine comprising - a combustion chamber, - an injection device comprising a fuel intake and adapted to inject fuel in the combustion chamber upon supply of fuel at its fuel intake, - a combustion chamber, - an injection device comprising a fuel intake and adapted to inject fuel in the combustion chamber upon supply of fuel at its fuel intake, - an air separation device, comprising: • an air intake adapted to intake an original gas mix comprising at least oxygen and nitrogen, • an oxygen output at which said air separation device is adapted to output an oxygen-enriched gas mix comprising an oxygen content higher than an oxygen content of the original gas mix upon introduction of an original gas mix at the air intake, and • a nitrogen output at which said air separation device is adapted to output a nitrogen-enriched gas mix comprising a nitrogen content higher than a nitrogen content of the original gas mix upon introduction of an original gas mix at the air intake, • an air intake adapted to intake an original gas mix comprising at least oxygen and nitrogen, • an oxygen output at which said air separation device is adapted to output an oxygen-enriched gas mix comprising an oxygen content higher than an oxygen content of the original gas mix upon introduction of an original gas mix at the air intake, and • a nitrogen output at which said air separation device is adapted to output a nitrogen-enriched gas mix comprising a nitrogen content higher than a nitrogen content of the original gas mix upon introduction of an original gas mix at the air intake, - an inerting circuit, - a fuel pipe to transport fuel or a mix comprising fuel, in which: - the nitrogen output of the air separation device is hydraulically connected to the inerting circuit, - the oxygen output of the air separation device is hydraulically connected to the injection device, - the nitrogen output of the air separation device is hydraulically connected to the inerting circuit, - the oxygen output of the air separation device is hydraulically connected to the injection device,