Patent ID: 8395278
Filing Date: 2013-03-12
Classification: F02N

Abstract:
1. A starting system for an internal combustion engine, comprising: a starter motor configured to transfer torque to the engine during an engine starting event; a low-voltage power bus including a first bus segment and a second bus segment; a controllable isolation circuit comprising an isolation diode electrically in parallel with an isolation switch, the isolation diode oriented with a forward bias from the first bus segment to the second bus segment permitting flow of electric power from the first bus segment to the second bus segment without active control, the isolation switch operative in a first state wherein the first and second bus segments are electrically coupled and a second state wherein the first and second bus segments are electrically isolated; a low-voltage battery and the starter motor electrically coupled to the first bus segment; an accessory power module and a power supply for a control module electrically coupled to the second bus segment; and the control module configured to control the isolation circuit to the second state to electrically isolate the first bus segment from the second bus segment during the engine starting event.