A method of controlling the operation of a range extended plug-in hybrid electric vehicle

摘要

A method of operating a motor-generator 22, in a range extended plug-in hybrid electric vehicle (PHEV), to provide lubrication so as to reduce wear/corrosion in a combustion engine 10. The method comprises measuring a length of time the engine 10 has not been run and, when the length of time exceeds a predetermined threshold and at least one other vehicle operating parameter has been met, using a motor-generator 22 to rotate a crankshaft (10c, fig 3) of the engine 10. The motor-generator 22 rotates the crankshaft (10c) which drives an oil pump 13 so as to supply oil to components of the engine 10. The operating parameter may include a state of charge of a high voltage battery 25, connection to an external mains electricity supply, the vehicle is stationary. A period of time the engine 10 is rotated may be based on ambient temperature. The motor-generator 22 may be supplied energy from the battery 25 or from the external mains. Also claimed is a range extended plug-in hybrid electric vehicle.