HYBRID ELECTRIC VEHICLE COOLING CIRCUIT AND METHOD OF COOLING

摘要

Embodiments of the invention provide a hybrid electric vehicle comprising an engine and at least one electric machine arranged to be cooled by coolant flowing through a coolant circuit of the vehicle, the engine and at least one electric machine being coupled in series in the circuit, wherein a bypass portion is provided arranged to allow at least a portion of the coolant to bypass the electric machine when the engine is running.