Patent ID: 7546830

Claim:
An injector drive device that drives an injector for supplying fuel into an internal combustion engine of an engine-motor hybrid vehicle, the hybrid vehicle having an electric motor, comprising: a drive switch unit having driving means that is supplied with power from a battery, which also supplies power to the electric motor, and drives an injector, and a housing for housing the driving means; and an input terminal that is provided on the housing and to which power from the battery is inputted, wherein the driving means is directly connected to the input terminal, wherein the driving means includes: a charge/discharge coil; a charge switch connected in series with the battery and the injector for charging the injector through the charge/discharge coil by the power of the battery when turned on; a diode connected in parallel to the charge switch; and a discharge switch connected to the charge switch, the diode and the charge/discharge coil at one end and grounded at the other end for discharging the injector through the charge/discharge coil and the diode to the battery to be stored therein.