Engine starting control device for hybrid vehicle

An engine starting control device for a hybrid vehicle provided with an internal combustion engine and a motor as power sources which engages an engagement device installed between the motor and the internal combustion engine and starts the internal combustion engine with a power force from the electric motor during an electric travelling of the hybrid vehicle driven by a driving force from the motor only,

• when an engine starting request is issued during the electric travelling, the engine starting control device determines whether or not a motor revolution speed (Ms) transmitted from the motor to the engagement device is equal to or lower than an idle revolution speed (Ei) of the internal combustion engine, and
• if the motor revolution speed (Ms) is determined to be equal to or lower than the idle revolution speed (Ei), the engine starting control device controls the starting of the internal combustion engine at a low speed mode in which an engagement capacity is set greater as an engagement ratio defined as a ratio of an internal combustion engine revolution speed (Ne) with respect to the motor revolution speed (Ms) becomes smaller if the engagement ratio is smaller than 1 and the engagement capacity is set to 0 if the engagement ratio is equal to or greater than 1.

An engine starting control device for a hybrid vehicle provided with an internal combustion engine and a motor as power sources which engages an engagement device installed between the motor and the internal combustion engine and starts the internal combustion engine with a power force from the electric motor during an electric travelling of the hybrid vehicle driven by a driving force from the motor only,

• when an engine starting request is issued during the electric travelling, the engine starting control device determines whether or not a motor revolution speed (Ms) transmitted from the motor to the engagement device is equal to or lower than an idle revolution speed (Ei) of the internal combustion engine, and
• if the motor revolution speed (Ms) is determined to be greater than the idle revolution speed (Ei), the engine starting control device controls the starting of the internal combustion engine at a high speed mode in which the engagement capacity is set greater as an idle revolution ratio defined as a ratio of the internal combustion engine revolution speed (Ne) with respect to the idle revolution speed (Ei) becomes smaller if the idle revolution ratio is smaller than 1 and the engagement capacity is set to 0 if the idle revolution ratio is equal to or greater than 1.