Patent ID: 8380409
Filing Date: 2013-02-19
Classification: B60K,B60L,B60W,F16H,Y02T

Abstract:
1. A vehicle power transmission system, comprising: a first electric motor; a differential section having an output rotational element, the differential section being connected to the first electric motor and controlling a differential motion between an input rotational speed and an output rotational speed by controlling an operation state of the first electric motor; a power interruption element that forms a part of a power transmission path; a second electric motor that is connected to the power transmission path between the power interruption element and the output rotational element of the differential section; and a control device that maintains the output rotational speed of the differential section at a predetermined constant value or at a value within a predetermined range until engagement of the power interruption element is completed during a period when a state of the vehicle power transmission system is being switched from a non-drive mode to a drive mode, so as to control a rotational speed of a primary power source by the first electric motor, the power interruption element being disengaged when in the non-drive mode, the power interruption element being engaged when in the drive mode.