Patent ID: 6718927
Filing Date: 2004-04-13
Classification: B60R,F02D,F02N,H02J,Y02T

Abstract:
Vehicle electrical system, comprising:a first low-voltage vehicle electrical system energy storage device; low-voltage vehicle electrical system consumers supplied with voltage by said first energy storage device; a starter generator, which, in starter operation, is supplied with voltage from said first energy storage device and, in generator operation, re-supplies said first energy storage device with voltage; an additional low-voltage energy storage device, which, in starter operation of said starter generator, is connected in series with said first energy storage device for a higher voltage for the starter generator and, in generator operation of said starter generator, is connected in parallel with said first energy storage device for a lower voltage; and semiconductor switches that control switchover of said additional energy storage device between the series connection and the parallel connection, wherein said semiconductor switches comprise current-limiting semiconductor switches.