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X3の取扱説明書・マニュアル [全132ページ 3.62MB]

Technology for comfort, convenience and safety50Limits of the systemEven with PDC, final responsibility for estimating the distance between the vehicle and any obstructions always remains with the driver. Even when sensors are involved, there is a blind spot in which objects cannot be detected. The system is also subject to the physical limits that apply to all forms of ultrasonic measurement, such as those encountered with tow bars and trailer couplings, or thin and wedge-shaped objects etc. Low objects already displayed, e.g. a curb, can also disappear from the detection area of the sensors again before a continuous tone sounds.Loud sources of sound, inside and outside the vehicle, could drown out the PDC sig-nal tone.< Keep the sensors clean and free of ice or snow in order to ensure that they will continue to operate effectively.Do not apply high pressure spray to the sensors for a prolonged period of time. Keep the spray at least 4 in/10 cm away from the sensors. < Driving stability control systemsYour BMW is equipped with an extended array of systems designed to enhance and maintain vehicle stability under extreme conditions. The following section describes these functions based on ABS, DSC, HDC and xDrive.Antilock Brake System ABSABS enhances active safety by preventing the wheels from locking under braking. The vehicle continues to be steerable during hard braking.ABS also includes Electronic brake-force distribution EBV.Safe braking, refer to page 77.Electronic brake-force distribution EBVEBV controls the brake system's applica-tion pressure at the rear wheels to ensure stable deceleration.Dynamic Brake Control DBCThe Dynamic Brake Control actively sup-ports the driver in dangerous braking situa-tions. Quickly pumping the brake pedal increases the braking effect with low pedal pressure so that the shortest possible braking distance is achieved. This system exploits all of the benefits provided by ABS.Do not reduce the pressure on the brake pedal for the duration of the brake applica-tion. DBC is deactivated when you release the brake pedal.Dynamic Stability Control DSCThe concept DSC maintains vehicle stability, even in critical driving situations. The DSC is operational every time you start the engine. The system optimizes the driving stability during acceleration and when starting from a standstill. The system recognizes any tendency for the vehicle to assume an unstable attitude such as oversteer or understeer; it then counteracts this ten-dency with a combination of graduated reductions in engine torque and selective braking intervention at individual wheels. DSC provides optimal stability within the limits defined by the laws of physics.The laws of physics cannot be repealed, even with DSC. An appro-priate driving style always remains the responsibility of the driver. Avoid using the additional safety margin provided by the system as an excuse for taking unneces-sary risks.Do not make any modifications to the DSC system. Never allow anyone other than authorized professional technicians to carry out service or repairs on the system. <

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