Method for controlling an injector

摘要

In a method for controlling a valve which injects fuel into a combustion chamber of an engine and which has a valve member which closes a valve opening, and an electric actuator which drives the valve member to carry out strokes for releasing the valve opening and to which electrical control signals are applied for triggering valve member strokes of a defined stroke size, in order to compensate for an age-related stroke reduction of the valve member and deteriorated metering of the injected fuel related thereto, a stroke loss model into which temperature and temperature changes at the valve as well as the number of strokes carried out by the valve member are continuously incorporated is used to predict a reduction of the stroke size as a stroke loss and to correct the control signals using the predicted stroke loss.

主权项

1. A method for controlling a valve which injects fuel into a combustion chamber of an internal combustion engine, the valve having (i) a valve member which closes a valve opening and (ii) an electric actuator which drives the valve member to carry out strokes for releasing the valve opening, the method comprising:
applying electrical control signals to the actuator for triggering valve member strokes of a defined stroke size; predicting, with the aid of a stroke loss model, a reduction of the stroke size as a stroke loss, wherein temperature and temperature changes at the valve as well as the number of strokes carried out by the valve member are continuously incorporated into the stroke loss model; correcting, by using the predicted stroke loss, the control signals to compensate for the reduction of the stroke size; and empirically ascertaining parameters of the stroke loss model at the valve which is separated from the internal combustion engine.