Method for controlling the temperature of glow plugs
AssigneeBorgWarner Ludwigsburg GmbH
InventorsAndreas Bleil, Michael Eberhardt
Life of this patent
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Abstract
A method for controlling the temperature of glow plugs of a combustion engine is described, wherein all glow plugs are heated up for an engine start by the input of electrical energy according to a profile which is uniformly specified for all glow plugs of the engine, a change in resistance ΔR is ascertained for each of the glow plugs for at least one specified time span, and a target resistance value is calculated for each glow plug from the associated change in resistance ΔR, this value being expected for the glow plug when it has reached its target temperature, and the target resistance value is used to control the temperature of the glow plug to the target temperature.
Claims10
A method for controlling the temperature of glow plugs of a combustion engine, comprising:
- heating up all glow plugs of the combustion engine for an engine start by inputting electrical energy according to a profile which is uniformly specified for all of the glow plugs of the engine;
- ascertaining a change in resistance ΔR for each of the glow plugs during at least one specified time interval;
- and
- calculating a target resistance value for each glow plug from the associated change in resistance ΔR, the target resistance value being a value that is expected for the respective glow plug when a target temperature is reached;
- and
- for each glow plug, using the target resistance value to control the temperature of the glow plug to the target temperature.
Dependencies are inferred from the claim text.