Patent ID: 9732694
Date: 2017-08-15
CPC Classifications: F02D,F02M

Claim:
1. A fuel supply device for supplying an engine with fuel sucked up from a fuel tank, the fuel supply device comprising: a fuel pump for sucking up the fuel from the fuel tank by rotation of a motor; a valve that is provided in a fuel passage for supplying the engine with the fuel sucked up by the fuel pump and that is opened when the fuel flowing in the fuel passage reaches a specified pressure to thereby discharge the fuel from the fuel passage; a storage portion for storing a relationship among a fuel pressure, a flow rate, which are required by the engine, and voltage and current which are supplied to the motor; a controller configured to supply the motor with the voltage and the current based on the relationship stored in the storage portion; a sensing portion for sensing the voltage and current, which is supplied to the motor by the controller when the valve is opened at a change point wherein a characteristic of the current and the voltage, which are supplied to the motor, is changed at a specified flow rate required by the engine; a calculation portion for calculating a difference between the voltage and the current which are stored in the storage portion in correspondence to a valve opening voltage, and the voltage and the current which are sensed by the sensing portion when the valve is opened; and a correction portion for correcting the voltage and the current, which are stored in the storage portion, on the basis of the differences calculated by the calculation portion.