Jagmohan Singh

US Patent:

20180335007, Nov 22, 2018

Filed:

May 16, 2017

Appl. No.:

15/596235

Inventors:

- Dearborn MI, US
Josephine S. LEE - Novi MI, US
Jagmohan SINGH - Ypsilanti MI, US
William David TREHARNE - Ypsilanti MI, US

International Classification:

F02N 11/08
B60L 11/18
B60L 11/08
H02M 7/44
B60L 11/14

Abstract:

A hybrid vehicle includes an isolation switch disposed between a first bus that is electrically coupled to a starter for an engine and a second bus that is electrically coupled to a power converter and accessory loads. The hybrid vehicle includes a controller programmed to normally command the switch closed, and, in response to expiration of a predetermined time interval without starting the engine, command the switch to open for a predetermined duration to perform diagnostics on the isolation switch.