| 摘要 |
Method of detecting a leak in a fuel system comprising a fuel tank and an orifice with a controlled section between the tank and the atmosphere, according to which
a) the controlled section is set to a value A 1 at a time T 1 and a pressure differential ” p 1 between the inside of the tank and the atmosphere is measured at least after an interval of time ”T from T 1 , for a constant fuel flow out of the tank;
b) the controlled section is set to a value A 2 at a time T 2 and a pressure differential ” p 2 between the inside of the tank and the atmosphere is measured at least after the same interval of time ”T from T 2 , for the same constant fuel flow;
c) a ratio of the pressure differentials ” p 1 and ” p 2 is computed and is compared to a reference pressure differential ratio ” p L obtained with the same fuel system but comprising a calibrated leak.
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