Method of and apparatus for indicating remaining fuel quantity for vehicles

A method for indicating a remaining fuel quantity for vehicles, comprising the steps of:

• detecting a liquid level of the fuel remaining in a fuel tank of a vehicle in a sampling manner at predetermined intervals to obtain detected data;
• eliminating an abnormal abruptly changed value in said detected data due to a change of the attitude of said vehicle;
• computing an average value of values of said detected data obtained by a predetermined number of sampling detection operations;
• and
• indicating said average value.

An apparatus for indicating a remaining fuel quantity for vehicles, comprising:

• detecting means for detecting a liquid level of the fuel remaining in a fuel tank of a vehicle;
• control means for computing an average value of a predetermined number of detected liquid level sampling data obtained by said detecting means at predetermined intervals, eliminating any abnormal detected value in said detected data and generating an indication signal indicative of the fuel remaining in said fuel tank;
• and
• indicator means for receiving said indication signal from said control means and indicating said remaining fuel quantity.

An apparatus for indicating a remaining fuel quantity for vehicles comprising:

• detecting means for detecting liquid levels of the fuel remaining in a fuel tank of a vehicle;
• microcomputer means for receiving detected signals indicative of the liquid levels from said detecting means, said microcomputer means sampling the detected signals at predetermined intervals and storing the sampled values, computing an average value of a plurality of the sampled and stored values, further computing an upper limit value and a lower limit value from the computed average value in accordance with a predetermined equation for computation, replacing the upper limit value by one of the sampled values to obtain a new upper limit value when the same exceeds the upper limit value and replacing the lower limit value by one of the sampled values to obtain a new lower limit value when the same becomes lower than the lower limit value and storing the new upper limit value and the new lower limit value, respectively, and further computing an average value of the sampled and stored values and generating an indication signal corresponding to the average value;
• and
• indicator means for receiving the indication signal and digitally indicating the remaining fuel quantity in response to the indication signal.