| 摘要 |
An automobile power unit includes an engine provided with a supercharger and a transmission having a hydrodynamic device such as a torque converter or a fluid coupling. The supercharger is of a type which is driven by the engine output through an appropriate clutch. The hydrodynamic device has a lock-up clutch for establishing a direct mechanical connection between the input and output members of the hydrodynamic device. A control unit is provided for at first disengaging the lock-up clutch and starting the operation of the supercharger when the automobile operating condition is in the lock-up zone and changed from the non-supercharging zone to the supercharging zone.
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