Hybrid vehicle and method for controlling same

摘要

A hybrid vehicle determines whether or not the drive mode thereof is shifted from a series drive to an engine direct coupled drive with a power transmission engaging/disengaging portion applied, derives a rotational speed at a drive wheel side of the power transmission engaging/disengaging portion which corresponds to a driving speed as an applying rotational speed of an internal combustion engine at which the power transmission engaging/disengaging portion is applied, and applies the power transmission engaging/disengaging portion by controlling the operation of the internal combustion engine when a difference in rotational speed between the rotational speed of the internal combustion engine and the applying rotational speed becomes equal to or smaller than a predetermined value after the shift to the engine direct coupled drive is determined.

主权项

1. A hybrid vehicle, comprising:
an internal combustion engine; a generator which is driven by the internal combustion engine to generate electric power; a battery which supplies electric power to a motor; the motor which is connected to drive wheels and which is driven by electric power supplied from at least one of the battery and the generator; and a power transmission engaging/disengaging portion which is disposed between the generator and the drive wheels so as to engage or disengage a power transmission path from the internal combustion engine to the drive wheels via the generator, wherein the hybrid vehicle is driven by power from at least one of the motor and the internal combustion engine, and the hybrid vehicle comprises: an engine direct coupled drive shifting determination section for determining whether or not the hybrid vehicle shifts from a series drive in which the motor which is driven by electric power generated by the generator based on power of the internal combustion engine is used as a drive source to an engine direct coupled drive in which at least the internal combustion engine is used as a drive source with the power transmission engaging/disengaging portion applied; an applying rotational speed deriving section for deriving a rotational speed at a drive wheel side of the power transmission engaging/disengaging portion which corresponds to a driving speed of the hybrid vehicle as an applying rotational speed of the internal combustion engine at which the power transmission engaging/disengaging portion is applied; an internal combustion engine control section for controlling an operation of the internal combustion engine; and an engaging/disengaging control section for controlling the power transmission engaging/disengaging portion so as to be applied when a difference in rotational speed between the rotational speed of the internal combustion engine and the applying rotational speed becomes equal to or smaller than a predetermined value after the engine direct coupled drive shifting determination section determines a shift to the engine direct coupled drive.