Method and device for controlling a stop-start program

#1. Field of the Invention

#The present invention relates to starter systems in motor vehicles.

#2. Description of Related Art

#FIG. 1 shows a schematic flow chart of a method for setting a current feed duration for supplying current to a starter of a starter system.

#FIG. 2 shows a schematic flow chart of a method for setting a current feed duration for supplying current to a starter of a starter system.

#FIG. 3 shows a schematic flow chart of a method for setting a current feed duration for supplying current to a starter of a starter system.

#FIG. 1 shows a schematic flow chart of a first exemplary embodiment of the method according to the present invention for setting a current feed duration for supplying current to a starter of a starter system. The first exemplary embodiment according to FIG. 1 has method steps 101 through 103. In method step 101, current is supplied to the starter for a certain current feed duration during meshing of a starter pinion of the starter with a coasting internal combustion engine. In method step 102, the current feed is shut down on reaching the certain current feed duration and the induced voltage is then measured. The induced voltage is measured on terminal 45 of the starter in particular.

#In method step 103, the measured induced voltage is compared with a reference voltage in particular and the current feed duration is set, depending on the result. The engine is revved up for a certain current feed duration, for example for x ms, because a certain rotational speed is expected after this current feed duration. After the current feed has stopped, the voltage is measured and it is checked whether or not the correct speed has been reached. The crank time is adjusted if necessary (adjustment or scaling of the reference line).

#FIG. 2 shows a schematic flow chart of a second exemplary embodiment for setting a current feed duration for supplying current to a starter of a starter system including method steps 201 through 204.