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目前采用单级涡轮增压器要再提高功率已不太可能。采用两级调节增压不仅可提高标定功率而且能提高起动扭矩。宝马轿车已开始应用两级涡轮增压器来提高标定功率和起动扭矩
It is not possible to use single-stage turbochargers to increase power again. Regulated boost with two stages not only increases the nominal power but also increases the starting torque. BMW sedan has begun to apply two-stage turbocharger to improve the calibration power and starting torque