초록 ▼

In a hybrid vehicle, there is a shock in a transient period when a driving condition of an internal combustion engine is shifted from a loaded driving state for power generation, in which a load is applied to the internal combustion engine by a motor generator, to a non-loaded driving state for idli

In a hybrid vehicle, there is a shock in a transient period when a driving condition of an internal combustion engine is shifted from a loaded driving state for power generation, in which a load is applied to the internal combustion engine by a motor generator, to a non-loaded driving state for idling or motoring, in which no load is applied to the internal combustion engine. A hybrid power output apparatus of the present invention, in which the motor generator is mechanically linked with the internal combustion engine, prevents an abrupt change in output torque from the motor generator in the transient period from the loaded driving state to the non-loaded driving state. One procedure to attain this object sets the minimum revolving speed of the internal combustion engine in the loaded driving state to be greater than the revolving speed in the non-loaded driving state by approximately 200 rpm. This setting enables the revolving speed of the internal combustion engine to gradually vary in the transient period from the loaded driving state to the non-loaded driving state, and prevents an abrupt change of the torque output from the motor generator, which is under the PI control based on the revolving speed of the internal combustion engine. This accordingly reduces a shock due to the abrupt change of the torque.

대표청구항 ▼

[ What is claimed is:] [1.] A power output apparatus having an internal combustion engine and a motor generator that is mechanically connected with said internal combustion engine and applies a significant load onto said internal combustion engine, said power output apparatus comprising:a torque var

[ What is claimed is:] [1.] A power output apparatus having an internal combustion engine and a motor generator that is mechanically connected with said internal combustion engine and applies a significant load onto said internal combustion engine, said power output apparatus comprising:a torque variation restricting unit that controls said internal combustion engine and said motor generator, in order to restrict a variation in torque output from said motor generator in a transient period to or below a predetermined level, in said transient period, a driving condition of said internal combustion engine being shifted from a loaded driving state, in which a load is applied to said internal combustion engine by said motor generator, to a non-loaded driving state, in which no load is applied to said internal combustion engine.