Auto Stop/Start Strategy

Engine restart without BISG  or starter motor intervention:

This is when an auto stop sequence begins, but before the engine stops fully and it is necessary to start the engine again. For example, the traffic lights go to green. The PCM  detects engine restart parameters from a driver action or system request. The PCM  activates the fuel injection and ignition systems to allow the engine to continue to operate. This is available at a variable engine speed threshold which depends on engine type.

Engine restart with BISG  or starter motor intervention:

If the PCM  cannot restart the engine without intervention, the PCM  uses the BISG  or the starter motor to control engine restart. If an engine restart is initiated, the PCM  activates the BISG  at the earliest opportunity to rotate the engine. The PCM  activates the BISG  through the HS CAN  power mode zero bus. Then on the first available compression, the PCM  operates the fuel injection and ignition systems to restart the engine in less than 0.36 second.