초록 ▼

In the process of starting an engine 150, the structure of the present invention lags an open and close timing of an intake valve 152 of the engine 150, thereby enabling a first motor MG1 mechanically linked with a crankshaft 156 via a damper 157 to motor the engine 150. When the revolving speed of

In the process of starting an engine 150, the structure of the present invention lags an open and close timing of an intake valve 152 of the engine 150, thereby enabling a first motor MG1 mechanically linked with a crankshaft 156 via a damper 157 to motor the engine 150. When the revolving speed of the engine 150 exceeds a specific range that causes a resonance, the open and close timing of the intake valve 152 is returned to an ordinary level, so as to start controls of a fuel supply to the engine 150 and ignition. The lagged open and close timing of the intake valve 152 decreases the effective compression ratio of the engine 150, thus enabling smooth rotations of the engine 150 and reducing the amplitude of the torsional vibrations of the crankshaft 156. This structure enables the revolving speed of the engine 150 to swiftly pass through the specific range that causes a resonance.

대표청구항 ▼

[ What is claimed is:] [1.] A driving system comprising:an internal combustion engine connecting with an output shaft via a damper;a motor having a rotating shaft mechanically connected to said output shaft;compression ratio varying means for varying an effective compression ratio of said internal c

[ What is claimed is:] [1.] A driving system comprising:an internal combustion engine connecting with an output shaft via a damper;a motor having a rotating shaft mechanically connected to said output shaft;compression ratio varying means for varying an effective compression ratio of said internal combustion engine;driving state detecting means for detecting a driving state of said internal combustion engine;motor control means for driving and controlling said motor in response to a predetermined driving requirement, in order to motor said internal combustion engine while a fuel supply to said internal combustion engine is stopped; andcompression ratio regulation means for, when the driving state of said internal combustion engine detected by said driving state detecting means in the process of motoring by said motor control means is within a predetermined range, regulating said compression ratio varying means to make the effective compression ratio of said internal combustion engine lower in the driving state within said predetermined range than that in the driving state out of said predetermined range.