Combustion engine forced start, basic function - GF07.10-P-1059A

Engine all (CAR) 

General 

The forced engine start ensures that the engine runs when the on-board electrical system supply is insufficient. Here the engine is force started autonomously by the combustion engine control unit.

Function requirements 

• Coolant temperature >115 °C
• Engine stop period of > 3 mins exceeded
• Vehicle speed > 2 km/h in forward travel
• Rolling backwards
• The ECO start/stop function is switched off
• On-board network condition requires the engine to run
• Brake assistance or distance control system in control intervention function
• Vacuum at brake booster not in specified range Air conditioning system requires engine to be running System or communication error in the following systems: steering, on-board electrical system, brake system, accelerator pedal, transmission, engine

Function 

A forced engine start is also conducted if the stability of the on-board electrical system can no longer be assured, e.g. as a consequence of load-intensive consumers. The engine continues to run until sufficient stability in the on-board electrical system can be assured. The ECO start/stop function is switched off if the stability of the on-board electrical system is not assured.