Glow plug driving control method and glow plug driving control device

摘要

The accuracy in controlling the heating temperature of a glow plug and the reliability of the control operation are improved.;An electronic control unit 101 is configured such that a standard applied voltage for glow plugs 50-1 to 50-n is set according to the engine speed and the load conditions of the engine. In addition, a correction coefficient set in advance according to the temperature classification of the mounted glow plugs 50-1 to 50-n is readably stored in the electronic control unit 101 as a correction coefficient map. By multiplying the standard applied voltage by a correction coefficient K read from the correction coefficient map and applying a voltage of the multiplication result to the glow plugs 50-1 to 50-n as a driving voltage through the power circuit 102 to perform driving control, stable and reliable heating temperature control can be realized regardless of variations in the heating temperature characteristics.

主权项

1. A glow plug driving control method for controlling power application to a glow plug, comprising:
correcting a voltage applied to the glow plug, which is set according to operating conditions of an engine, using a correction coefficient, which is set in advance according to temperature characteristics of the glow plug by measuring a temperature under predetermined power application conditions for the glow plug to be used, classifying the measurement result into a plurality of temperature ranges, acquiring an applied voltage, which is required for obtaining a target temperature targeted at the time of driving after mounting into a vehicle for a central product of glow plugs belonging to the classification, as an actual applied voltage for each of the classifications, and calculating a ratio of the actual applied voltage for each of the classifications to a standard applied voltage, which is a voltage applied to the glow plug at the time of driving that is set on the basis of a central product of all of the glow plugs to be used, as each correction coefficient, and applying the corrected voltage to the glow plug to perform driving control, wherein the correction coefficient set according to the temperature characteristics of the glow plug corresponds to the classification to which the glow plug to be used belongs.