Daimler Freightliner Cascadia 2021, Driver Manual

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Engine Idle Limiting
Idle Shutdown Timer
This feature is an optional 1- to 100-minute idle shut-
down system with a timer on the driver display
screen. Its purpose is to conserve fuel by eliminating
excessive idling. Idle shutdown timing and param-
eters are programmable. See the engine manufactur-
er’s operation manual for specific details for your ve-
hicle.
Optimized Idle®
Optimized Idle is an optional feature on vehicles
equipped with Detroit engines. Optimized Idle re-
duces engine idle time by running the engine only as
required when the vehicle is parked.
Optimized Idle automatically shuts down and restarts
the engine as needed to:
•
keep the engine oil temperature between pro-
grammed limits;
•
maintain battery voltage;
•
keep the cab and sleeper areas at the thermo-
stat setting; and
•
in coordination with the Dual HVAC system (if
equipped), maintain the battery and assist in
HVAC.
The benefits of the system include reduced engine
idle time, fuel savings, reduction of exhaust emis-
sions and noise, increased starter and engine life,
and a reduced chance of dead batteries.
Optimized Idle operates in the following modes:
•
Cold startability mode and battery mode: both
modes keep the battery charged and engine oil
temperature between programmed limits.
•
Interior comfort mode (for sleeper cabs without
a Dual HVAC system): keeps the cab and
sleeper at a constant preset temperature, in
addition to all functions available in cold start-
ability and battery modes. Extended and con-
tinuous run modes allow the engine to keep
running longer if necessary.
•
Interior comfort mode with a Dual HVAC sys-
tem: keeps the cab and sleeper at a constant
preset temperature, in addition to all functions
available in cold startability and battery modes.
In cold startability mode, Optimized Idle starts the
engine when engine oil temperature drops to a pro-
grammable preset lower limit. The engine is shut
down when engine oil temperature reaches a pro-
grammable upper limit, unless the requirements of
other active modes require the engine to keep run-
ning.
In battery mode, the engine runs for 2 hours before
shutting down. On vehicles without a Dual HVAC
system, the engine will run an additional 2 hours in
extended mode if necessary, and continuously in
continuous mode. When in continuous mode, the
driver display will indicate Optimized Idle status as
"continuous battery mode." Continuous mode may
indicate a problem, such as a bad battery.
Interior comfort mode controls the temperature set
point, which is the desired temperature of the cab
and sleeper, and the comfort zone, which is the al-
lowed temperature deviation from the set point be-
fore the engine starts.
Interior comfort mode with a Dual HVAC system op-
erates with the following parameters regarding the
set point and comfort zone:
•
If the bunk area temperature reaches more
than 10°F (5.5 °C) above the set point the
comfort zone is exceeded and the Dual HVAC
system immediately requests the engine to
start for comfort support cooling.
•
Bunk area temperatures 5 to 10°F (2.8 to
5.5°C) above the set point for over twenty min-
utes will cause the Dual HVAC system to re-
quest the engine to start for comfort support
cooling.
•
If the bunk area temperature drops to more
than 10°F (5.5 °C) below the set point, the
comfort zone is exceeded and the Dual HVAC
system immediately requests the engine to
start for comfort support heating.
•
Temperatures 5 to 10°F (2.8 to 5.5 °C) below
the set point for over twenty minutes will cause
the Dual HVAC system to request the engine
to start for comfort support for heating.
In extreme ambient conditions, comfort mode may
stay on continuously.
NOTE: If the mode settings are changed while
in one mode, the system may continue running
in another mode.
When Optimized Idle is on, it may turn off these
functions to reduce stress on the batteries:
•
Cab climate control fan
Optional Engine Systems
13.1