Patent ID: 6553972
Filing Date: 2003-04-29
Classification: F02D,F02M

Abstract:
A fuel pump control device for controlling an electrically-operated fuel pump for supplying fuel to an internal combustion engine, said control device comprising:a vehicle operating state deciding means for generating a vehicle operating state signal representative of a operating state of a vehicle; comparing means for comparing said vehicle operating state signal with a specific value; and controlling means, for controlling opening/closing of a connection between said fuel pump and a power supply line in accordance with the comparison result obtained by said comparing means, said controlling means including a thyristor operatively connected to said fuel pump for selectively supplying power thereto and a drive coil and a switching relay for selectively connecting said drive coil to said fuel pump, said switching relay including a first contact for connecting said drive coil to said fuel pump when the drive coil is in an excited state and a second contact for connecting the thyristor to said fuel pump when the drive coil is in a non-excited state.