PURPOSE: To prevent occurrence of run-out of fuel in a vehicle using mixed fuel, by comparing a detected value signal outputted from a fuel residual quantity detecting means with a signal of a reference value of the residual quantity of fuel set by a fuel residual quantity reference value setting means.
CONSTITUTION: A detected value signal outputted from a fuel residual quantity sensor 1 is inputted to a control unit 2 wherein microcomputer is incorporated. To the unit 2, a detected value signal outputted from an alcohol sensor 3 as a detecting means of concentration of alcohol of mixed fuel wherein alcohol is mixed in gasoline, for instance, is inputted. The unit 2 is equipped with a fuel residual quantity reference value setting means 5 which sets a reference value of the residual quantity of the fuel on the basis of the detection signal from the sensor 3 and with a judging means which compares the detected value signal outputted from the sensor 1 with a signal of the reference value of the residual quantity of the fuel set beforehand and judges whether or not a detected value is below the reference value. When the detected value is judged to be below reference value by the judging means, an alarming means 4 issues an alarm.
YAMAURA HIROMITSU
FUKUMOTO TAKAFUMI
KASHIWABARA MASUO
OTANI SEIICHI
SEKIGUCHI HIDEKI
| JPH0232020B2 | 1990-07-18 |