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5. Driving guide
5.3.3 HHC
The hill-start hold control (HHC) is an active
safety system from software function extension
on the basis of ESP, which is mainly used to
help the driver to pull away successfully on a
steep slope.
When the vehicle is stationary, the HHC detects
whether the vehicle is on a slope through the
longitudinal acceleration sensor. Subsequently,
when the vehicle goes up the slope from the
stationary state (through forward traveling or
reversing), the HHC will automatically enter
the working state. At starting, when the driver
releases the service brake pedal, the HHC
will maintain the previous brake pressure to
ensure that the vehicle still stops and gradually
reduce the brake pressure with the increase
of driving torque to realize the effect that the
vehicle does not slide in the opposite direction
without parking braking applied, which greatly
improves the vehicle starting on a slope,
frequent stops, starting, parking, etc.
At starting on a slope, the HHC prevents the
vehicle from sliding backwards in the interval
between the driver releasing the brake pedal
and depressing the accelerator pedal, thus
improving the safety and reliability of the
vehicle during starting on a slope.
Working conditions
-
The gearshift lever is in a position other
than “P”.
-
The accelerator pedal is not depressed.
-
The vehicle is stationary.
-
Electric park brake is not applied.
-
On the premise that the above basic
conditions are met, the HHC is activated
when the driver further depresses the
brake pedal when the vehicle stops.
5.3.4 HDC*
The Hill Descent Control (HDC) is a subsystem
of ESP. If the driver does not depress the
brake pedal while going downhill, HDC helps
the driver to decelerate while going downhill
via the ESP actively applying braking force.
On and off
Driving assistance
ESP off
LKA
FCW
HDC
TSR
AEB
-
With the ENGINE START/STOP button
set to “ON” position, enter the AV system,
click the driving control panel button
on the bottom toolbar to enter the driving
control panel interface, and click the
“HDC” soft key to activate the HDC. When
the HDC is working, the corresponding
indicator lamp
will stay on or flash,
and a message reading “HDC is working”
