176 4-5 Driving Auxiliary Functions
■ TCS may not work effectively in the following circumstances:
● When the vehicle is running on a wet and slippery road, TCS system
may be unable to control the direction and meet the power
requirement even if it works normally.
● Do not drive the vehicle with the possibility of losing stability and power
of the vehicle.
Hill hold control system(HHC)
After the brake pedal is released, HHC can hold the braking force applied by the
driver for 1s to prevent backward slipping of the vehicle.
Hydraulic Brake Assist (HBA)
When the driver quickly depresses the brake pedal, HBA can identify that the
vehicle is in an emergency state and then actively increase the braking
pressure. Thus, the ABS will be activated more rapidly to shorten the braking
distance in an effective way.
Controller deceleration parking(CDP)*
When the EPB is pulled up, CDP will start to work and the vehicle will be braked
at a constant deceleration (the deceleration will be 0.4g if only the EPB is pulled
up and will be 0.8g if the EPB is pulled up and the brake pedal is depressed at
the same time) until the vehicle is stopped. If the driver releases the EPB, CDP
will stop working.
Hill descent control(HDC)
■ Working principles: HDC is a value-added function of ESP system to
improve the riding comfort of the vehicle. The main effect of HDC is to help
the driver to drive downhill at a low speed by active braking. During HDC
operation, ABS will be activated when the wheel slip ratio goes beyond the
ABS triggering threshold. This function enables the driver to drive downhill
or even reverse in a safe and stable manner.
■ Turn HDC on or off:
● When the vehicle speed is lower than 38 km/h, the HDC function may
be activated by pressing the HDC button. After this function is
activated, the HDC function status indicator on the instrument will stay
on.
● When it is unnecessary to activate HDC function, by pressing the HDC
button again, the HDC function indicator on the instrument will be off
immediately. When the vehicle speed is over 65km/h, HDC function
will also be deactivated automatically.
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