Patent ID: 8217310
Filing Date: 2012-07-10
Classification: F02P

Abstract:
1. A glow plug electrification control apparatus which controls supply of electric current, via a lead wire, to a glow plug which includes a heat generation section generating heat in response to the current and which has a resistance having a positive correlation with a heater temperature of the heat generation section, the control apparatus comprising: temperature-raising-period electrification control means for raising the heater temperature of the glow plug; maintaining-period electrification control means for maintaining the heater temperature at a predetermined target temperature after the heater temperature has been raised; temperature-raising-period-resistance acquisition means for acquiring, as a temperature-raising-period resistance, a resistance of the glow plug that includes a resistance of the lead wire and that is measured at a predetermined timing in a temperature-raising period in which the temperature-raising-period electrification control means raises the heater temperature; and maintaining-period resistance acquisition means for acquiring, as a maintaining-period resistance, the resistance of the glow plug including the resistance of the lead wire and that is measured in a maintaining period in which the maintaining-period electrification control means maintains the heater temperature, wherein the maintaining-period electrification control means comprises: target resistance acquisition means for acquiring a target resistance corresponding to the target temperature on the basis of the temperature-raising-period resistance; and maintaining-period resistance control means for controlling the supply of the electric current to the glow plug such that the maintaining-period resistance coincides with the target resistance.