초록 ▼

A fuel volume measuring system for an automotive vehicle in which fuel volume detection signals are simply averaged during a relatively-short averaging time period at regular measuring cycles when the vehicle is being refueled, and further weight-averaged or moving-averaged at regular measuring cycl

A fuel volume measuring system for an automotive vehicle in which fuel volume detection signals are simply averaged during a relatively-short averaging time period at regular measuring cycles when the vehicle is being refueled, and further weight-averaged or moving-averaged at regular measuring cycles when the vehicle is running. Therefore, fuel volume can be indicated quickly at a high response speed when the vehicle is being refueled and additionally fuel volume fluctuations can be minimized when the vehicle is running. Further, the system according to the present invention discloses the method of detecting the state where the vehicle is being refueled on the basis of the fact that the difference between at-least one of the current data signal indicative of fuel volume and at-least one of the preceding data signal indicative of fuel volume exceeds a predetermined value.

대표청구항 ▼

A fuel volume measuring system for an automotive vehicle provided with a fuel tank, which comprises: fuel volume sensing means for repeatedly outputting a fuel volume detection signal Dm corresponding to fuel volume within the fuel tank at regular time intervals; first averaging means responsive to

A fuel volume measuring system for an automotive vehicle provided with a fuel tank, which comprises: fuel volume sensing means for repeatedly outputting a fuel volume detection signal Dm corresponding to fuel volume within the fuel tank at regular time intervals; first averaging means responsive to said fuel volume sensing means for averaging the fuel volume detection signal and outputting a first averaged fuel voulme data signal Am; second averaging means responsive to said first averaging means for further averaging the averaged fuel volume data signal Am and outputting a second averaged fuel volume data signal Bm; fuel volume calculating means for calculating a fuel volume on the basis of an effective averaged fuel volume data signal and outputting a fuel volume data signal Qm; vehicle speed determining means for determining vehicle speed and causing either said first averaged fuel volume data signal Am or said second averaged fuel volume data signal Bm to be provided as said effective averaged fuel volume data signal in response to said vehicle speed; indicator means responsive to said fuel volume calculating means for indicating a fuel volume on the basis of the fuel volume data signal Qm, whereby the fuel volume data signal Qm is calulated by said first and second averaging means for suppression of fluctuations of the fuel volume indication. A method of measuring fuel volume within a fuel tank for an automotive vehicle, which comprises the following steps of: (a) detecting the fuel volume within the fuel tank repeatedly and outputting fuel volume detection signals corresponding thereto at regular time intervals; (b) simply-averaging the fuel volume detection signals and outputting simply-averaged fuel volume data signal Am; (c) comparing the current simply-averaged fuel volume data signal Am with the preceding simply-averaged fuel volume data signal Am-1; (d) if the current simply-averaged fuel volume data signal Am is equal to or smaller than the preceding simply-averaged fuel volume data signal Am-1, weight-averaging the simply-averaged fuel volume data signal Am, outputting a weight-averaged fuel volume data signal Bm, and calculating the fuel volume data signal Qm on the basis of the calculated weight-averaged fuel volume data signal Bm; (e) if the current simply-averaged fuel volume data signal Am is greater than the preceding simply-averaged fuel volume data signal Am-1, calculating the fuel volume signal Qm on the basis of the calculated simply-averaged fuel volume data signal Am; and (f) indicating the fuel volume in accordance with the calculated fuel volume data signal Qm, whereby the fuel volume can be indicated on the basis of the weight-averaged fuel volume data signal Bm when the fuel volume is decreasing, but on the basis of the simply-averaged fuel volume data signal Am when the fuel volume is increasing.