Because inline compressor may operate at same pressure with different speeds, the PO surge line is implemented as dependence between engine’s speed and inline compressor speed. No “special” control methods are required. NEW CBV DEVICE If we agree that practically the crossing maneuver may be done at different loads, we must use a blow-off valve able to maintain different constant pressures after transition point till both compressor are enough Downloaded from SAE International by Nan Kai University of Technology, Monday, December 02, 2019decelerated. This device is not usually used in automotive industry. In addition, the other field devices theoretically able to operate in this situation (such as proportional valve) are not yet developed to be used in automotive area. For this reason in Figure 7 is presented a binary CBV designed for automotive application. The binary CBV presented could maintain constant the compressors’ pressure at 16 different values. The binary design guarantee 16 equals steps in all the operational range, so even there is not a real continuous regulation, the binary CBV may operate successfully in most of the applications. For commercial applications, the operational range generally below to the interval between 5 - 80 kPa with 5 kPa on step to 10 - 160 kPa with 10 kPa on step.