Patent ID: 6136267
Filing Date: 2000-10-24
Classification: A62C,B64D,Y10S

Abstract:
An aircraft fuel ignition arrester system comprising:a fuel tank having a fuel region containing fuel and an ullage region containing a fuel/air mixture having a flammability range, said flammability range having an upper limit of fuel to air concentration above which said fuel/air mixture is incombustible; andcontrol means for maintaining said concentration equal to or above a predetermined value that is higher than said upper limit by increasing the fuel content of said fuel/air mixture in response to said concentration falling equal to or below said predetermined value, whereby said fuel/air mixture is maintained above said upper limit so as to be incombustible, wherein said control means comprises:a detector for signaling when said concentration rises and falls to said predetermined value; andfuel injection means responsive to said signaling when said concentration falls to said predetermined value to inject fuel into said ullage region at least until said concentration rises to said predetermined value.