Running a PHEV in EV mode under cold conditions

摘要

A plug-in hybrid electric vehicle comprises an internal combustion engine (1), a coolant outlet (2) of the internal combustion engine (1) being connected to a coolant inlet (3) of a fuel operated heater (4) and wherein a coolant outlet (5) of the fuel operated heater (4) is connected to a coolant inlet (6) of an HVAC heater (7), a coolant outlet (8) of the HVAC heater (7) further being connected to a coolant inlet (9) of the internal combustion engine (1), the vehicle further comprising a temperature sensor (10) arranged at the coolant outlet (2) of the internal combustion engine (1) and a temperature sensor (11) arranged at the coolant outlet (5) of the fuel operated heater (4). The vehicle further comprises a three way valve (12) arranged between the coolant outlet (8) of the HVAC heater (7) and the coolant inlet (9) of the internal combustion engine (1) such that there is a connection (13) between the coolant outlet (8) of the HVAC heater (7) and the coolant inlet (3) of the fuel operated heater (4), the connection (13) thus bypassing the internal combustion engine (1).