| 摘要 |
An internal combustion engine for an automotive vehicle includes a belt, alternator, supercharger (BASC) power system having a positive displacement supercharger with coacting rotors, a belt drive from the engine to the supercharger, an overrunning clutch allowing the supercharger to overrun the belt drive, and a motor-generator connected to charge a battery when the motor-generator is overrunning the belt drive. The system allows electric overrun of the supercharger to increase engine charge air and power at low engine speeds, to electrically offset some parasitic losses and increase power at high engine speeds, to use supercharger inertia to drive the motor-generator and charge the battery during engine decelerations, and to electrically reduce belt drive loads by supplementing supercharger drive power during transmission downshifts that increase engine speed, and thus minimize “chirping” sounds due to belt slipping.
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