BYD e2 Owner's Manual page 138

HBA (Hydraulic Brake Assist)
When the driver quickly depresses the brake pedal, HBA can be used to recognize the
emergency conditions and quickly increase the brake pressure to a maximum value,
allowing ABS to be applied more quickly, so as to reduce the braking distance effectively.
Controller Deceleration Parking (CDP) (If fitted)
When the electronic parking switch is pulled up, the CDP starts working so that the vehicle
is braked at a constant deceleration (The deceleration is 0.4g if the electronic parking switch
is pulled up and the brake pedal is not depressed and is 0.8g if the electronic parking switch
is pulled up and the brake pedal is depressed), till the vehicle is stopped. If the electronic
parking switch is released, the CDP stops working.
Hill Descend Control (HDC) (If fitted)
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Working principle: HDC is a value-added function of ESP system to improve the vehicle
comfort. The HDC can be activated and deactivated by pressing the HDC button. The
HDC is mainly functioned to assist the driver's upslope or downslope driving at low
speed by active braking method. During the working of HDC, if the slip rate of any
wheel exceeds the triggering threshold of ABS, the ABS is activated. It can ensure the
driver's safe and stable downslope driving and even reversing.
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Turn-on of HDC:
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When the vehicle speed is <38km/h, press the HDC switch button to turn on this
function. In such case, the HDC status indicator lamp on the instrument keeps on.
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Vehicle speed control of HDC:
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The HDC function is functional within approximately 11~38km/h range. Within this
range, you can depress/release the accelerator pedal or brake pedal to adjust the
vehicle speed and the value upon the release of accelerator or brake pedal shall
prevail. While the HDC is working, the HDC status indicator lamp on the instrument
flashes to indicate the working of HDC.
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Turn-off of HDC:
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If it's unnecessary to use HDC function, press the HDC switch button again. In
such case, the indicator lamp on the instrument turns off.
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The HDC is turned off automatically when the vehicle speed is higher than
approximately 65km/h.
4-5 Driving assistance function 137
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