A vehicle propulsion system includes a combustion engine, an exhaust aftertreatment system connected to the combustion engine, and an electrical power collector for intermittently collecting electrical power from external power supply track during driving of the vehicle. The vehicle propulsion system includes a heating system that is arranged to heat at least one component of the exhaust aftertreatment system and/or the combustion engine. The electrical power collector is arranged for supplying the heating system with electrical power when collecting electrical power from the external power supply track.