freightliner PX113064S T 2016, Руководство пользователя

Страница: 145 / 236

A dynamic thick outer blue line led by a electronic
needle communicates the amount of regenerative
braking power being generated at any moment.
Pressing on the accelerator pedal, putting the vehicle
in neutral, or moving the right-hand stalk switch to
the off position deactivates the regenerative braking
charge request.
If the right-hand stalk switch is in the low, medium, or
high position when the keyswitch is turned on, the
regenerative brake telltale, shown in
Fig. 11.2,
flashes and regenerative braking is disabled. To
enable regenerative braking and stop the telltale from
flashing, move the right-hand stalk switch to the off
position.
Regenerative Braking Limitations
A number of dynamic conditions affect the active
amount of regenerative braking power generated.
These include the vehicle’s speed, mass, the terrain,
and the high-voltage batteries current state of charge
(SOC). Regenerative braking is limited if the batteries
have a high SOC. It may also be limited if the high-
voltage batteries are cold.
If the regenerative braking is limited, or severely
limited, the driver is notified of this limitation through
a message appearing on the driver’s display.
Dynamic Regenerative Braking Using the
Accelerator Pedal
If equipped with dynamic regenerative braking using
the accelerator pedal, the driver can engage
regenerative braking when lifting their foot off the
accelerator pedal at speeds above approximately 20
mph (32 km). At low speeds, such as when in stop
and go traffic, there is little to no kinetic energy to be
captured through regenerative braking.
To activate regenerative braking using the
accelerator pedal, the right-hand stalk switch must be
requesting regenerative braking power at a low,
medium, or high level. This level may act as a limit to
the amount of regenerative braking power that can
be recouped from a slowing vehicle, therefore DTNA
suggests setting the stalk switch to high to allow the
driver to regulate the amount of regenerative braking
through modulating the pressure on the accelerator
pedal.
When the driver lifts their foot off the accelerator
pedal with the right-hand stalk switch engaged, the
electric motor immediately uses the kinetic energy of
the vehicle to charge the batteries, slowing the
vehicle. Using this feature in traffic allows a driver to
extend the vehicle’s range.
When the vehicle is coasting, the regenerative
braking needle sits at zero.
Energy Waste Mode
This mode improves braking performance by
providing a base level of regenerative braking when
the high-voltage batteries limit charging, such as
when the batteries are at a high SOC.
To reduce stress on the service brakes when
regenerative braking is limited, energy waste mode
activates thermal management components (the AC
compressor, pumps, and fans) to increase power
consumption to increase available regenerative
braking capacity. When active, energy waste mode
creates a loud humming noise.
Descent Control
NOTE: If the high-voltage batteries are fully
charged, regenerative braking is not available.
Descent control mode attempts to keep the vehicle
below a set speed on a downhill slope by using all
available regenerative braking stages.
To activate descent control mode, remove your foot
from the accelerator pedal, set the right-hand stalk
switch to any of the three ’on’ positions (1, 2, or 3)
as shown in
Fig. 11.1, and then use the set or
resume buttons to set the vehicle speed. The
descent control mode telltale, shown in
Fig. 11.4,
illuminates on the driver display when descent
control mode is active.
As descent control mode is not designed to keep the
vehicle
above any set speed, it is possible to
eventually coast to a stop unless the accelerator
pedal is applied or the right-hand stalk switch is
moved to the ’off’ position (0).
If the accelerator pedal is applied, the descent
control mode resumes when the accelerator pedal is
released.
f612066 04/26/2022
Fig. 11.4, Descent Mode Telltale
Brake Systems
11.2