TÀI LIỆU đào tạo công nghệ hybrid trên xe KIA optima 2011 unprotected

OHEV SG CG 01 Cover:Layout 1

3/25/2011

1:43 PM

Page 1

Course Guide

Optima Hybrid
Technology (HEV)
Student Guide
Course Guide

OHEV.01


OHEV SG CG 01 Cover:Layout 1

3/25/2011

1:43 PM

Page 2

SAFETY FIRST
Appropriate service methods and proper repair procedures are essential for safe,
reliable operation of all motor vehicles as well as the personal safety of the individual
performing the repair. There are numerous variations in procedures, techniques, tools
and parts for servicing vehicles, as well as in the skill of the individual performing the

service. This module cannot possibly anticipate all such variations and provide advice or
caution to each. Accordingly, anyone who departs from the instruction provided in this
module must first establish that they compromise neither their personal safety nor the
vehicle integrity by their choice of methods, tools or parts. The following list
contains general warnings that should always be followed while working on a vehicle.
•

Always wear safety glasses for eye protection.

•

Use safety stands whenever a procedure requires underbody work.

•

Be sure the ignition switch is always off unless otherwise specified by a procedure.

•

Set the parking brake when working on the vehicle.

•

Operate the engine only in a well ventilated area.

•

Keep clear of moving parts when the engine is running.

•

To prevent serious burns, avoid contact with hot metal parts such as the radiator,
exhaust manifold, tail pipe, catalytic converter and muffler.

•

Do not smoke while working on a vehicle.

This course requires the student/technician to work closely with a high voltage battery.
In order to maximize safety, the student/technician will be required to remove all metallic objects on your person, including but not limited to watches, body piercings, pins,
buttons, bracelets, etc, in order to reduce the risk of electrical arcing and potential electrocution. In addition, those students/technicians who use metallic medical devices,
such as pacemakers, insulin pumps, etc., should be aware of the potential risks of working closely with a high voltage battery.
Within this module you will find Notes, Cautions and Warnings which provide critical
information and help you do your job safely and efficiently. When you see a Note,
Caution or Warning, be certain you understand the message before you attempt to perform any part of a service procedure.Below are the definitions of these terms.
NOTE
The purpose of a Note is to help you do your job more efficiently. A Note may
provide additional information to help clarify a particular point or procedure.

!

!

CAUTION
A Caution alerts you to the possibility of damage to tools, equipment, or the
vehicle. A Caution recommends that a procedure must be done in a certain way to
avoid potential problems resulting from improper techniques or methods.
WARNING
A Warning alerts you to the highest level of risk. Warnings inform you that a
procedure must be done in a particular way to minimize the chances of an accident

that could result in personal injury or even loss of life.


OHEV SG CG 01 Cover:Layout 1

3/25/2011

1:43 PM

Page 3

The content of this course is intended for informational and educational purposes only. Any reliance placed on
such information is therefore strictly at your own risk. In no event will Kia Motors America, Inc. ("KMA") or Kia
University be liable for any loss or damage including, without limitation, indirect or consequential loss or damage,
property loss, damage, personal injury or death caused to any persons arising out of or in connection with the
use of this course.
While KMA makes all reasonable efforts to ensure that all course materials are correct, accuracy cannot be guaranteed and KMA does not assume any responsibility for the accuracy, completeness, or authenticity of any information contained in these course materials. Nothing in this course is intended as a guarantee of success.
The content of this course is intended for informational and educational purposes only. Any reliance placed on
such information is therefore strictly at your own risk. In no event will Kia Motors America, Inc. (“KMA”) be liable
for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with the use of this course.
While KMA makes all reasonable efforts to ensure that all course materials are correct, accuracy cannot be guaranteed and KMA does not assume any responsibility for the accuracy, completeness, or authenticity of any information contained in these course materials. All information contained herein was accurate and correct at the time
of publishing.
This course does not represent a commitment on the part of KMA or any companies mentioned. All materials are
provided without any warranty whatsoever. Nothing in this course is intended as a guarantee of success.
From time to time, Kia Motors America may need to update or make changes to the vehicle features and other
vehicle information reported in this [insert applicable material such as video or workbook, etc.]. Some vehicles
shown may include optional equipment. KMA, by the publication and dissemination of this material, does not create any warranties, either expressed or implied to any Kia products.
Reproduction of the contents of this material without the expressed written approval of KMA is prohibited.
© 2011 Kia Motors America, Inc. All Rights Reserved.

OHEV SG CG 01 Cover:Layout 1

3/25/2011

1:43 PM

Page 4

TT-OHEV211-IL-CG01
2nd Printing - March 2011


Optima Hybrid Technology
OPTIMA HYBRID TECHNOLOGY
Course Guide
COURSE OVERVIEW

COURSE GOALS

This instructor-led course develops skills Kia Service
Technicians need to safely service the Optima Hybrid
Electric Vehicle (HEV) through theory and instructor
supervised hands-on guided practices.
The goal of this course is to increase a technician’s
efficiency and productivity through a thorough
understanding of the High Voltage (HV) system and
safety procedures required to service the vehicle to
meet customer expectations for a first visit fix.
Critical service topics include:

x Proper use of personal protection equipment (PPE)
x Safely disabling the HV system
x Key HEV components and subsystems
x Tools necessary for safely repairing the HV system
x Service procedures include:
o Safety Plug Removal and Installation
o HV Measurement
o Current Data Analysis
o Component Calibrations
o System Actuation Tests

COURSE OBJECTIVES

Upon completion of this course, the Kia Service
Technicians will be able to demonstrate to their
instructor:
x Safely disable the HV system
x Inspect, measure, and evaluate HEV components
x Analyze electrical schematics on selected HEV
circuits
x Use of Hybrid special service tools
x Calibrate specific Hybrid components
x Use the GDS to perform service procedures and test
specific Hybrid systems

EXPECTATIONS

In this course, you will be expected to use personal
protection equipment, follow diagnostic procedures and
instructions to safely service and gain a technical

understanding of HEV systems and their operation.

OHEV Course Guide 01

1


Optima Hybrid Technology
TARGET AUDIENCES

PREREQUISITES

TECHNICAL TRAINING
SYSTEM

THEORY

GUIDED PRACTICE

PERFORMANCE
ASSESSMENT

The target audience for this course consists of Kia
Dealership Technicians who have an advanced
understanding of electrical systems, diagnosis, and
have successfully completed the prerequisites.
The following prerequisites must be completed prior to
the start of this course:
x Diagnosing with GDS VE (GDS6) ILC or equivalent
x Auto Electrical Diagnosis ILC (AED)

x Introduction to Hybrid Safety Web based course (IHS)
x Hybrid Technical Highlights Web based course (HTH)
Kia University has adopted a training delivery system
where you will need to successfully pass prerequisite
courses containing knowledge that supports the course.
The course contains safety, system theory, and
operation with tasks to practice what you have learned
concluding with a Performance Assessment.
A Theory Module presents information to increase
your working knowledge of the subject, which helps
guide you to successful diagnosis and repair.
The Guided Practice Module allows you the
opportunity to practice diagnostic skills through handson experience. The tasks are instructor supervised and
verified.
The Performance Assessment Module provides you
the opportunity to demonstrate what you have learned.

COURSE ACHIEVEMENT

A final score of 80% or higher is required to pass this
course.

PERFORMANCE SCORECARD

The Performance Scorecard is used to track your
performance on guided practices, diagnosis &
troubleshooting, and written knowledge assessments.

SCORECARD ROUTING

One copy of the scorecard is yours, and one copy is
used to update your Kia technical training records.
Should you not complete the course, the third copy is
forwarded to your Kia District Parts and Service.

ANSWER SHEET

2

An answer sheet is provided to record your
Performance Assessment answers. You will return your
answer sheet to your instructor for grading. Your score
will be transferred to the scorecard.

OHEV Course Guide 01


Optima Hybrid Technology

11
12
13
14

X
X

1
1
1

1
1
1
2
2
2
2
2
2
3
3
3
3
3
3

X
X
X
X
X
X
X
X
X
X
X
X
X

Course
Timeline

Guided
Practice

Theory

Course Day

06
07
08
09
10

Course Guide **
Intro Optima HEV & Safety
Intro Optima HEV & Safety
Battery System & Electric Motor
Battery System & Electric Motor
Hybrid Power Control Unit
Day Two – Review
Hybrid Power Control Unit Cont.
Hybrid Power Control Unit
Hybrid Engine & Transaxle
Hybrid Engine & Transaxle
Hybrid Auxiliary Systems
Day Three - Review
Hybrid Auxiliary Systems

Active Hydraulic Booster
Active Hydraulic Booster
Performance Assessment (PA)
PA Review and Clean-up

Performance
Assessment

01
02
03
04
05
06

Module Title

Module
Number

COURSE MATERIAL/TIMELINE

8:00 – 8:30 am
8:30 – 10:00 am
10:00 – 10:45 am *
10:45 – 2:00 pm *
2:00 – 3:00 pm *
3:00 – 5:00 pm
8:00 – 8:30 am
8:30 – 9:30 am

9:30 – 11:00 am *
11:00 – 2:00 pm *
2:00 – 3:30 pm *
3:30 – 5:00 pm
8:00 – 8:30 am
8:30 – 9:30 am
9:30 – 11:00 am *
11:00 – 12:00 pm *
12:00 – 3:00 pm *
3:00 – 4:00 pm

*Includes Break and Lunch
** Kia recent TSBs and service information

Beginning of each day begins with a review of modules completed the previous day.

OHEV Course Guide 01

3


Optima Hybrid Technology

COURSE MANAGEMENT

The course and its materials are here for you to learn
and keep. Use them and your time in a way that will
benefit you when you return to your dealership.

TAKE NOTES

Make drawings, jot down notes, and highlight these
materials to help you remember important details. Each
module is designed with ample margins for your
important notes.

ASK QUESTIONS

If you do not understand something in this course, ask
your instructor for clarification. Asking questions is
strongly encouraged to help you get the most out of
this course.

TEAMWORK

LEARN AT EVERY
OPPORTUNITY

During the hands-on activities, you will often be
working as a team. By actively engaging in each
activity, you will maximize your learning experience.
While in the lab, feel free to ask the instructor
questions at any time.
This course is an opportunity for you to learn in a
controlled environment under the guidance of a trained
Kia instructor. Through active participation you can
build confidence in your abilities to diagnose customer
concerns right the first time, every time!

ICONS

The Reference Icon indicates you must refer to
additional publications in order to complete the
questions or activity.
The Activities Icon indicates an activity that supports
a critical learning objective. These activities are offered
to help you master the material.
The Feedback Icon indicates a progress check meant
to provide you with feedback on your understanding of
the course material.
The STOP Icon indicates you must STOP the activity.
Do not proceed until instructed to continue.

4

OHEV Course Guide 01


OHEV SG TH 02 Cover:Layout 1

3/25/2011

1:42 PM

Page 1

Introduction to Optima
HEV & Safety

Optima Hybrid
Technology (HEV)

Student Guide
Theory Module

OHEV.02


OHEV SG TH 02 Cover:Layout 1

3/25/2011

1:42 PM

Page 2

SAFETY FIRST
Appropriate service methods and proper repair procedures are essential for safe,
reliable operation of all motor vehicles as well as the personal safety of the individual
performing the repair. There are numerous variations in procedures, techniques, tools
and parts for servicing vehicles, as well as in the skill of the individual performing the
service. This module cannot possibly anticipate all such variations and provide advice or
caution to each. Accordingly, anyone who departs from the instruction provided in this
module must first establish that they compromise neither their personal safety nor the
vehicle integrity by their choice of methods, tools or parts. The following list
contains general warnings that should always be followed while working on a vehicle.
•

Always wear safety glasses for eye protection.

•

Use safety stands whenever a procedure requires underbody work.

•

Be sure the ignition switch is always off unless otherwise specified by a procedure.

•

Set the parking brake when working on the vehicle.

•

Operate the engine only in a well ventilated area.

•

Keep clear of moving parts when the engine is running.

•

To prevent serious burns, avoid contact with hot metal parts such as the radiator,
exhaust manifold, tail pipe, catalytic converter and muffler.

•

Do not smoke while working on a vehicle.

This course requires the student/technician to work closely with a high voltage battery.
In order to maximize safety, the student/technician will be required to remove all metallic objects on your person, including but not limited to watches, body piercings, pins,
buttons, bracelets, etc, in order to reduce the risk of electrical arcing and potential electrocution. In addition, those students/technicians who use metallic medical devices, such

as pacemakers, insulin pumps, etc., should be aware of the potential risks of working
closely with a high voltage battery.
Within this module you will find Notes, Cautions and Warnings which provide critical
information and help you do your job safely and efficiently. When you see a Note,
Caution or Warning, be certain you understand the message before you attempt to perform any part of a service procedure.Below are the definitions of these terms.
NOTE
The purpose of a Note is to help you do your job more efficiently. A Note may
provide additional information to help clarify a particular point or procedure.

!
!

CAUTION
A Caution alerts you to the possibility of damage to tools, equipment, or the
vehicle. A Caution recommends that a procedure must be done in a certain way to
avoid potential problems resulting from improper techniques or methods.
WARNING
A Warning alerts you to the highest level of risk. Warnings inform you that a
procedure must be done in a particular way to minimize the chances of an accident
that could result in personal injury or even loss of life.


OHEV SG TH 02 Cover:Layout 1

3/25/2011

1:42 PM

Page 3

The content of this course is intended for informational and educational purposes only. Any reliance placed on
such information is therefore strictly at your own risk. In no event will Kia Motors America, Inc. ("KMA") or Kia
University be liable for any loss or damage including, without limitation, indirect or consequential loss or damage,
property loss, damage, personal injury or death caused to any persons arising out of or in connection with the use
of this course.
While KMA makes all reasonable efforts to ensure that all course materials are correct, accuracy cannot be guaranteed and KMA does not assume any responsibility for the accuracy, completeness, or authenticity of any information contained in these course materials. Nothing in this course is intended as a guarantee of success.
The content of this course is intended for informational and educational purposes only. Any reliance placed on
such information is therefore strictly at your own risk. In no event will Kia Motors America, Inc. (“KMA”) be liable
for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with the use of this course.
While KMA makes all reasonable efforts to ensure that all course materials are correct, accuracy cannot be guaranteed and KMA does not assume any responsibility for the accuracy, completeness, or authenticity of any information contained in these course materials. All information contained herein was accurate and correct at the time
of publishing.
This course does not represent a commitment on the part of KMA or any companies mentioned. All materials are
provided without any warranty whatsoever. Nothing in this course is intended as a guarantee of success.
From time to time, Kia Motors America may need to update or make changes to the vehicle features and other
vehicle information reported in this [insert applicable material such as video or workbook, etc.]. Some vehicles
shown may include optional equipment. KMA, by the publication and dissemination of this material, does not create any warranties, either expressed or implied to any Kia products.
Reproduction of the contents of this material without the expressed written approval of KMA is prohibited.
© 2011 Kia Motors America, Inc. All Rights Reserved.


OHEV SG TH 02 Cover:Layout 1

3/25/2011

1:42 PM

Page 4

TT-OHEV211-IL-TH03
2nd Printing - March 2011

Optima Hybrid Technology
INTRODUCTION TO HEV AND SAFETY
Theory
MODULE GOAL

MODULE OBJECTIVES

MODULE INSTRUCTIONS

Upon completion of this module, technicians will be
able to identify hybrid vehicle components, operation,
driving modes, and safety procedures.
Upon completion of this module, technicians should be
able to:
x Identify HEV components
x Identify HEV driving modes
x List safety equipment
x Perform high voltage glove inspection
x List safety procedures
This theory module will conclude with progress check
questions that will assess what technicians have
learned.
Pay attention, ask questions, and participate to get the
most out of this module.

TARGET AUDIENCE

REQUIRED MATERIALS

TIME TO COMPLETE

The target audience for this module consists of Kia
dealership technicians who will service, diagnose, and
repair the Kia Optima Hybrid.
To complete this module, the following items will be
needed:
x Optima Hybrid Vehicle
x High Voltage Safety Gloves (Class 0)
x Safety Glasses
x Roof Safety Topper
x DVOM (CAT III)
Approximately 90 minutes

Introduction to HEV and Safety – Theory 02

1


Optima Hybrid Technology
ACRONYMS
AAF

Active Air Flaps

HWP Heater Water Pump

ABS

Anti-lock Brake System

IGBT Insulated Gate Bipolar Transistor

AHB

Active Hydraulic Booster

LDC

Low DC-DC Converter

ASP

Absolute Steering Position

LiPB

Lithium-ion Polymer Battery

BAU

Brake Actuation Unit

MCU

Motor Control Unit

BCM

Body Control Module

MDPS Motor Driven Power Steering

BMS

Battery Management System

NVH

CAN

Controller Area Network

NVLD Natural Vacuum Leak Detection

Noise Vibration Harshness

CLUM Cluster Module

OPU

Oil Pump Unit (module)

CPS

Clutch Pressure Sensor

PAG

Polyalkylene Glycol

ECM

Engine Control Module

PCM

Powertrain Control Module

E-COMP Electric A/C Compressor

PRA

Power Relay Assembly

ECU

Electronic Control Unit

PTS

Pedal Travel Sensor

EOP

Electric Oil Pump

PVE

Polyvinyl ether

EPS

Electric Power Steering

PWM

Pulse Width Modulated

ESC

Electronic Stability Control

SAS

Steering Angle Sensor

EWP

Electric Water Pump

SJB

Smart Junction Box

EV

Electric Vehicle

SMK

Smart Key Module

FATC

Fully Automatic Temperature
Control

SOC

State of Charge

SSB

Start/Stop Button

SST

Special Service Tool

TCM

Transmission Control Module

TCS

Traction Control System

HCU

Hybrid Control Unit

HEV

Hybrid Electric Vehicle

HPCU Hybrid Power Control Unit
HPU

Hydraulic Power Unit

HSG

Hybrid Starter Generator

HV

High Voltage

2

TMED Transmission Mounted Electric
Device

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology
INTRODUCTION

WHAT IS AN HEV?

A Hybrid Electric Vehicle (HEV) is defined as a vehicle
that utilizes power from both an engine and an electric
motor to achieve higher fuel efficiency when compared
to a similar engine-only vehicle.
The Kia HEV is driven by 2 power sources:
x A 2.4L Theta II MPI engine
x A 30 kilowatt electric motor (40 horsepower)

PARALLEL TYPE

The Kia HEV is considered a parallel-type system.
The Kia parallel-type system utilizes a Transmission
Mounted Electric Device (TMED).
The engine and drive line are mechanically connected,
so the system requires a transmission.
The motor in this TMED type is directly connected to
the transmission and is separated from the engine.
There is a clutch between the engine and the motor.
This separation allows for an electric-only drive mode.
It is also known as a full- or hard-type hybrid system,
which allows driving on electric motor power without the
need for the engine.

Introduction to HEV and Safety – Theory 02

3

Optima Hybrid Technology
COMPONENTS

The main components of the Optima hybrid system are:

4

x

Theta-II 2.4 MPI Atkinson Cycle Engine

x

6 Speed Automatic Transaxle

x

Electric Motor & Hybrid Starter Generator (HSG)

x

High Voltage Battery Assembly

x

Hybrid Power Control Unit (HPCU)
o HCU (HEV System Control Unit)
o LDC (Low DC-DC Converter)
o MCU (Motor Control Unit, or Inverter)

x

Active Hydraulic Booster (AHB)

x

Electric A/C Compressor

x

Transaxle Electric Oil Pump (EOP)

x

Active Air Flap (AAF)

x

Hybrid Cluster (CLUM)

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology
HYBRID ENGINE

The hybrid engine is a Theta II 2.4L MPI Atkinson Cycle
engine.
It is modified to maximize engine efficiency and fuel

economy.
The Atkinson Cycle engine includes the following to
reduce engine pumping losses:
x

An increased compression ratio

x

Pistons are changed to reduce combustion chamber
volume

x

Thermostat opening temperature is increased to
88°C (190°F) from 82°C (180°F)

x

Lighter valve springs

x

Piston rings are coated with low-friction material

Introduction to HEV and Safety – Theory 02

5

Optima Hybrid Technology
HYBRID AUTOMATIC TRANSAXLE

The hybrid vehicle uses a 6-speed automatic transaxle.
The torque converter has been removed and the
hydraulic engine clutch and torsion damper installed in
its place.
An electric oil pump is mounted on the side of the
transaxle to generate required hydraulic pressure for
transaxle shifting and engine clutch operation during
low speed driving or Electric Vehicle (EV) mode, in
which the vehicle operates only on the electric motor
while the engine is stopped.

6

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology
MOTORS

Stator Coil

Permanent
Magnet
Armature

ELECTRIC MOTOR

The electric drive motor installed in the hybrid has a
maximum power output of 30 kilowatts (40 hp).
In Electric Vehicle (EV) mode, the electric motor
provides the power necessary to move the vehicle
without using the engine.
In hybrid mode, the electric motor assists engine power
and recharges the high voltage battery during
regenerative braking.

HYBRID STARTER
GENERATOR

The Hybrid Starter Generator (HSG) assembly rated at
@ 8.5 kilowatts (11 hp) allows the hybrid to switch
between Electric Vehicle and hybrid modes.
It cranks the engine for starting, and acts as a
generator to charge the high voltage battery when the
state of charge (SOC) is below a specified value.

Introduction to HEV and Safety – Theory 02

7


Optima Hybrid Technology
BATTERY ASSEMBLY

The high voltage battery assembly has four major
components.
x The 270 volt lithium-ion polymer high voltage

battery.
x Power Relay Assembly (PRA)
x Battery Management System (BMS) module
x Air cooling system
In addition, active protection devices such as the Power
Relay Assembly and fuses improve reliability and
durability.
For safety, the high voltage battery assembly uses a
battery current check circuit, which shuts off electric
current in case of over-charge.
If a system fault occurs, the BMS turns off the Power
Relay Assembly to protect the hybrid system.
The BMS module maintains the optimal performance of
the high voltage battery.
The BMS measures the current, voltage and
temperature of the battery and calculates the high
voltage battery SOC.
The BMS controls the air cooling system used to
maintain optimal battery temperature by passing cool
air through the battery case.
The BMS performs the cell balancing control, which
minimizes voltage deviation of each cell during battery
charging and discharging.

8

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology

MOTOR CONTROL UNIT

MOTOR CONTROL UNIT

The Motor Control Unit (MCU) is a combination inverter
and converter.
The inverter circuits generate alternating current (AC) to
operate the electric motors from the high voltage
battery.
The converter circuits change the alternating current
(AC) of the electric motors to direct current (DC) to
charge the high voltage battery.

LOW VOLTAGE
DC TO DC CONVERTER

In the HEV, the Low Voltage DC to DC Converter (LDC)
reduces the voltage from the high-voltage battery to 12
volts, supplying power to electric devices and charging
the auxiliary battery.
In conventional vehicles, the alternator supplies power
to electric devices and charges the battery.

Introduction to HEV and Safety – Theory 02

9


Optima Hybrid Technology
ACTIVE AIR FLAP

The hybrid uses an active air flap mounted between the
grille and the radiator.
Flap opening is controlled according to driving
conditions.
The flap closes while driving to reduce air resistance.
When the engine temperature increases, the flap opens
to reduce the engine room temperature.
Engine coolant temperature, A/C pressure, and vehicle
speed are transmitted via CAN communication to the
smart actuator, which opens and closes the flap.

10

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology
ACTIVE HYDRAULIC BOOSTER

Because the engine does not run all the time, it does
not use a vacuum booster.
An Active Hydraulic Booster (AHB) system replaces the
vacuum booster.
To provide normal brake pedal feel, the system uses a
brake pedal simulator and pedal travel sensor.
Vehicle braking uses both hydraulic braking and
regenerative electric motor braking.

Introduction to HEV and Safety – Theory 02

11


Optima Hybrid Technology
ELECTRIC A/C COMPRESSOR

An electric compressor is used to ensure continued
operation of the A/C, even when the engine stops.
It is divided into three-sections:
x Compressor
x Motor
x Inverter
When the A/C is selected, the FATC sends an
operation authorization request to the HCU.
The HCU then sends a signal with the allowable electric
power amount back to the FATC.
The FATC operates the electric compressor within the
allowable electric power range.

12

Introduction to HEV and Safety – Theory 02


Optima Hybrid Technology
POWER FLOW

ENGINE CRANKING

The Hybrid Starter Generator (HSG) is connected to the
crankshaft with a drive belt and is used to start the
engine.
Two (2) auto tensioners provide belt tension.
In the event of HSG failure or if the drive belt is broken,
the engine is started by the electric motor.

EV DRIVING

If the state of charge of the high voltage battery is
normal, only the electric motor power is used when the
vehicle starts to move or during low-speed driving.
While the engine is OFF, the transaxle’s hydraulic
pressure is generated by the EOP.

Introduction to HEV and Safety – Theory 02

13