| 摘要 |
Method for estimating the fuel level in a vehicle tank comprising measuring the fuel level (D, LS) through a fuel level sensor (11) and acquiring (14) information regarding the instantaneous fuel consumption (FC) available in the motor vehicle,
comparing (13) said fuel level measurement (D, LS) with said information regarding the instantaneous consumption (FC) to estimate the fuel level (LIV) in the tank, According to the invention said method comprises estimating the fuel level (LIV) at a series of subsequent instants (k-1, k), estimating such fuel level (LIV) at a current instant (k) as a function of values acquired at a previous instant (k-1),
said comparison operation (13) comprising limiting the speed of variation of said fuel level estimation (LIV),
said limitation operation comprising calculating a level variation (RLS) calculated between a level estimation (LIV(k-1)) at a previous instant (k-1) and a measured level value (LS(k) at the current instant (k),
comparing a speed of said level variation (RLS) with one or more level variation speed limit values (Su, Sd) calculated starting from said instantaneous fuel consumption value (FC) between said current instant (k) and said previous instant (k-1),
said estimation operation comprising, as a function of the result of said comparison operation (13), using - as estimation (LIV(k)) - the measured level value (LS(k)) at the current instant (k) or obtaining said estimation (LIV(k) as a linear extrapolation according to one of said level variation speed limit values (Su, Sd). |
