A starter-generator (ISG) is mechanically connected to an internal combustion
engine
(BKM), comprises a bi-directional AC/DC converter (1), and can be connected
to an accumulator (B1) by means of a first switch (S1), and connected
to a double layer capacitor (DLC) by means of a second switch (S2). The
accumulator (B1) is either connected to the double layer capacitor (DLC)
by means of a control circuit (PWM), or the accumulator (B1) and the double
layer capacitor (DLC) are connected to a bidirectional DC/DC converter (3)
and to a second accumulator (B2) by means of a third switch (S3)
and a fourth switch (S4).
