2020 KIA OPTIMA engine

H2
HEV (HYBRID ELECTRIC VEHICLE) SYSTEM
The Kia Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the electric motor for power. The electric
motor is run by a 270V high-voltage HEV battery.
Depending on the driving conditions, the HEV computer selectively operates between the engine and the electric
motor or even both at the same time.
Fuel efficiency increases when the engine is at idle, or when the vehicle is driven by the electric motor with the HEV
battery.
The HEV battery charge must be maintained because, at times, the engine may come on even at idle to act as a gen-
erator. Charging also occurs when decelerating or by regenerative braking.
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H3
PHEV (PLUG-IN ELECTRIC VEHICLE) SYSTEM
The Kia Plug-in Hybrid Electric Vehicle (PHEV) shares the characteristics of both a conventional hybrid electric vehi-
cle and an all-electric vehicle.
When used as a conventional hybrid electric vehicle, the HEV computer selectively operates between the engine and
the electric motor or even both at the same time.
When it is operating in the electric vehicle mode, the vehicle is driven only using the electric motor over a certain dis-
tance until the hybrid battery becomes low. The driving distance in EV mode depends on customer driving style and road
conditions. Aggressive driving maneuvers may at times temporarily enable the engine to operate for maximum power.
The hybrid battery can be fully charged by connecting a plug to an external electric power source.
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Electric Vehicle ModeStart up/Low speedAcceleration High speedDecelerationExternal charging
Electric motor
CD (Charge Depleting) Mode
CS (Charge Sustaining) Mode
Charging
MotorEngine+MotorEngineChargingBattery charging
6

H106. Check if the charging cable con-
nection indicator of the high volt-
age battery in the instrument clus-
ter is turned ON.
Charging does not occur when the
indicator is OFF. When the charg-
ing connector is not connected
properly, reconnect the charging
cable to charge.
✽ ✽ NOTICE
Moving the shift lever from P (Park)
to R (Reverse)/N(Neutral)/D (Drive)
stops the charging process.
To restart the charging process,
move the shift lever to P (Park),
press the Engine Start/Stop button
to the OFF position, and disconnect
the charging cable. Then, connect
the charging cable.
7. After charging has started, the
estimated charging time is dis-
played on the instrument cluster
for about 1 minute. It is also dis-
played when the driver's door is
opened with charging in progress.
When scheduled charging is set,
the estimated charging time is dis-
played as “--” .
CHARGING THE PLUG-IN HYBRID VEHICLE (CONT.)
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8. Charging starts automatically andthe charging indicator lamp starts
to blink. 9. Check if the charging cable con-
nection indicator of the high volt-
age battery in the instrument clus-
ter is turned ON.
Charging does not occur when the
indicator is OFF. When the charg-
ing connector is not connected
properly, reconnect the charging
cable to charge.
✽ ✽ NOTICE
Moving the shift lever from P (Park)
to R (Reverse)/N(Neutral)/D (Drive)
stops the charging process.
To restart the charging process,
move the shift lever to P (Park),
press the Engine Start/Stop button
to the OFF position, and disconnect
the charging cable. Then, connect
the charging cable and restart the
vehicle again.
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Changing plug-in hybrid mode
Pressing the HEV button changes
the plug-in hybrid system modes,
between Electric (Charge
Depleting/CD) mode and Hybrid
(Charge Sustaining/CS) mode.
Each time the mode is changed a
corresponding message is displayed
on the instrument cluster as follows.
Plug-in hybrid mode indicator
: The high-voltage(hybrid) battery is
used to drive the
vehicle.
: The high-voltage(hybrid) battery
and gasoline
engine is used to
drive the vehicle.
A corresponding message is displayed
to indicate the selected mode.
DRIVING THE HYBRID/PLUG-IN HYBRID VEHICLE
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H27
Coasting guide (if equipped)
A chime will sound and the coasting
guide indicator will blink four times to
inform the driver when to take the
foot off the accelerator by anticipat-
ing a decelerating event* based on
the analysis of driving routes and
road conditions according to the nav-
igation system. It encourages the
driver to remove the foot from the
pedal and allow coasting down the
road with EV motor only. This helps
preventing unnecessary fuel con-
sumption and increases fuel efficien-
cy.❈
Example of a deceleration event is
going down an extended hill,
approaching a toll booth, and
approaching reduced speed
zones.
Press the Engine Start/Stop button
and put the shift lever in P(Park). In
the User Settings Mode, select
Driver assistance, Coasting Guide,
and then On to turn on the system.
Cancel the selection of coasting
guide to turn off the system. For the
explanation of the system, press and
hold the [OK] button.

To activate the system, take the fol-
lowing procedures. Enter your desti-
nation information on the navigation
and select the driving route. Select
the ECO mode in the Integrated
Driving Control System. Then, satisfy
the following.
- The driving speed should be
between 60 km/h (37 mph) and 160
km/h (99 mph).
❈ The operating speed may vary
due to difference between instru-
ment cluster and navigation effect-
ed by tire inflation level.
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✽ ✽NOTICE
Coasting guide is only a supplemen-
tal system to assist with fuel-efficient
driving in certain situations. Thus,
the operating conditions may be dif-
ferent in accordance with
traffic/road conditions (i.e. driving
in a traffic jam, driving on a slope,
driving on a curve). Thus, take the
actual driving conditions into con-
sideration, such as distances from
the vehicles ahead/ behind, while
referring to the coasting guide sys-
tem as guidance.
Unplug vehicle to start
(Plug-in hybrid)
This message is displayed when you
start the engine without unplugging
the charging cable. Unplug the
charging cable, and then start the
vehicle.
Remaining time (Plug-in hybrid)
This message is displayed to notify
the remaining time to fully charge the
battery.
Shift to P to charge(Plug-in hybrid)
This message is displayed when the
charging connector is plugged with
the shift lever in R (Reverse), N
(Neutral) or D (Drive). Move the shift
lever to P (Park) and re-start the
charging process.
Electric/Hybrid modes (Plug-in hybrid)
A corresponding message is dis-
played when a mode is selected by
pressing the HEV button.
Low battery. Maintaining Hybridmode (Plug-in hybrid)
This message is displayed when the
vehicle is unable to convert to EV
mode even when pressing the HEV
button during HEV mode driving due
to insufficient high-voltage (hybrid)
battery level.
Low battery temp. Maintainingcurrent (Plug-in hybrid)
This message is displayed when the
vehicle is unable to convert to EV
mode even when pressing the HEV
button during HEV mode driving due
to low battery temperature.
DRIVING THE HYBRID/PLUG-IN HYBRID VEHICLE (CONT.)

H33
Power Assist
Electric and Engine power are used
to move the vehicle.
(Battery & Engine \bWheel)
Engine Only Propulsion
Engine power is used to move the
vehicle. (Engine \bWheel)
Engine Generation
Vehicle is stopped with the Engine
charging the hybrid battery.
(Engine \bBattery)
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