Active & passive safety systems on Hyundai vehicles ... · Active & passive safety systems on Hyundai vehicles; Development & strategy Road Safety conference, Belgrade April 27 th

Active & passive safety systems

on Hyundai vehicles;

Development & strategy

Road Safety conference, Belgrade

April 27th – 29th 2011

Hyundai Auto Beograd, Since 2002

3

1997 ~ 1967

1996 Completion of the Namyang new

Research & Development Center

1994 Annual production exceeds 1 Million;

1967 Founding of the

Hyundai Motor Company

HISTORY HISTORY

2005 ~ 1998

2005 Hyundai Motor Company enters the

Top 100 Global Brands list

2003 HMC first automaker to announced the

global environmental management

2002 Official Partner of the

2002 FIFA World Cup Games;

2000 1st fuel cell electric vehicle;

1998 Acquisition of Kia

HISTORY HISTORY

2010 ~

Hyundai Motor Company is in Global Top 5

HISTORY HISTORY

Distributers ( and Dealers) around Globe

HISTORY HISTORY

What shall we speak about in this reminder

� Active systems of safety

� Passive systems of safety

� Developments and strategy

History

A brake is a device which inhibits motion.

Brakes

Tire forces and brake forces

FSFS

FF

FF

Tire

Brake disc or

drum

a

v

a Decelleration

V Speed

FS Apply pressure

FF Friction Force

FN

FS

FU

Forces

ES

P

AB

S

EB

D

TC

S

VS

M

Bra

kin

g f

orc

e c

oe

ffic

ien

t

1.2

1.0

0.8

0.6

0.4

0.2

0 20 40 60 80 %

1. Radial tires on dry concrete

2. Bias-ply winter tires on wet asphalt

3. Radial tires on snow

4. Radial tires on ice

ABS control ranges

Brake slip

Braking force coefficient

ABS control ranges

Lateral force coefficient

Bra

kin

g /

La

tera

l fo

rce

co

eff

icie

nt

0 20 40 60 80 %

Brake slip

0.2

0.4

0.6

0.8

1.0 α = 2°

α = 10°

α = 2°

α = 10°

Figure #1 Figure #2

Turning

Acceleration Deceleration

Direction tire is

facing

Slip angle

Direction tire

is travelling

FRICTION & slip mi Forces

Phase 1: Emergency Situation, Panic braking (Maximum vehicle deceleration)

Phase 2: Reduced braking requirement (Deceleration proportional to pedal force)

barPhase 1 Phase 2

Emergency braking Controlled braking

Actual deceleration

m/s²

20

16

12

8

4

0

120

80

40

0

Wheel Pressure

Switching threshold

Master Cylinder pressure

Hyundai

Brake

Assistant

control

BA

speed front wheel

speed rear wheel

speed

km/h

pressure

bar

pressure

hold

pressure

decreasehold

or

decrease

EBD-control ABS-control t (s)

pressure front wheel

0.25g

def. max

difference

pressure rear wheel

Electronic

Brake force

Distribution> 50km/h

EBD

Bra

kin

g c

on

tro

l on

low

tra

ctio

n s

urf

ace

s

Sp

ee

d

Sw

itch

ing

sig

na

ls:

Pe

rip

he

ral

wh

ee

l

acc

ele

rati

on

, S

lip

Bra

ke p

ress

ure

Phase 1 2 3 4 5 6 7 8

Vehicle speed

Reference speed

Slip switching threshold

Peripheral wheel speed

Thresholds of

peripheral wheel

acceleration

Brake pressure decrease

Thresholds of

peripheral wheel

deceleration

ABS

Advantages of ABS

Vehicle without ABS

Vehicle with ABS

Wheel speed

Wheel

acceleration/

decelleration

Phase

Valve Signal

Brake pressure

Wheel spin

Vehicle speed

Time

0 1 2 3 4 5 4 3 4 5 4

TCS

Traction

Ccontrol on low traction surfaces

System

General TCS function

Vehicle speed

km/h 22 50 100 150 200

Speed Difference

km/h

2

4

6.5

8.5

Brake intervention

Torque reduction

ESP

Turning

radius

center

Cornering

force

Centrifugal

force

Centrifugal force

Cornering force

Turning

radius

center

Oversteering

Neutral steering

Understeering

Relationship between cornering force and centrifugal force during turns

ESP

Roll over protection (ROP)

Wheel speed sensor

CAN-bus

Yaw rate / lateral G sensor

Steering position

sensor

CAN-bus

Torque reduction request

ECM

ESP-Operating Light

ROP control

ESPCU

ESP switch

ROP ONROP ON ROP OFFROP OFF

TCS

Vehicle weight

Center of gravity Lateral force

Downhill

Brake

Control

8km/h

Wheel speed

sensor

Stop lamp switch

Yaw rate /

2G sensor

DBC switch

Accelerator

pedal

2km/h – 35km/h

OFF

Slope min. 8%

Released

ON

Operating

telltale

CAN-bus

DBC relay

Solenoid valves

Pump motor

Pressure

sensor

Stop lamps

Brake application

DBCSlope min. 8% (4.5°)

Time

To

rqu

e

Time

To

rqu

e

2 sec.

Time

To

rqu

e

Time

To

rqu

e

Hill start

Assist

Control

Wheel speed

sensor

Yaw rate /

2G sensor

Accelerator

pedal

D/R range

( AT)

Clutch switch (MT) Gear Engaged

Stop lamp switch ON OFF

Activate

solenoid

valves

Brake engaged

Slope 8% (4.5°)

De - activate

solenoid

valves

Brake released

0km/h

Slope min. 8%

ON OFF

Brake torque Engine torque

Gear EngagedCAN-bus

Neutral control*

* Diesel AT only

Slope 8% (4.5°)

Inputs and outputs (sample ix35)

Wheel speed to

ECM

Battery power

Wheel speed

sensor

Stop lamp switch

Clutch switch

ESP switch

Steering angle

sensor

Yaw rate /

2G sensor

ESP- Off / Failure

telltale

ESP-Operating

telltale ESP - Hydraulic

electronic

control unit

ECM

ECM

CAN-Bus

Built in pressure sensor

CAN-bus

CAN-bus

DBC switch

Accelerator

pedal

ABS- Operating/

Failure telltale

EBD- Failure

telltale

Gear hold

request ECM

CAN-bus

Torque

reduction

request

CAN-bus

DBC relay

DBC-Operating

telltale

CAN-bus

CAN-bus

CAN-bus

Diagnosis

CAN - bus

DBC / ESP

Failure telltale CAN-bus CAN-bus

ESS

Speed above 55km/h Deceleration 7m/s²

Enable condition ESS

+

Deceleration below 2.5m/s²

Disable condition for ESS

Time (sec)

Vehicle speed (kph)

30kph

10kph

10 sec

ESS deactivation 2.5 m/s²

Additional feature operation

(only if speed is below 30km/h at

this point)

CASE-1

CASE-2

Additional

feature

deactivated

(CASE-2)

Additional

feature

deactivated

(CASE-3)

…

ON

OFF

ESS

Operation

Signal

Brake Lamp

Flash

Hazard

lamp*Basic Features

*Additional Feature

(3.5Hz)

…

ON

OFF

ON

OFF

Emergency

Stop

Signal

EPB Switch

EPB Control module

& Actuator

System layout

Pulling force

Pulling

force

Signal input to

control module

Electronic

Parking

Brake

EPB

Vehicle with Airbag

Vehicle without Airbag

AIR BAGPASSIVE SAFETY Air bags

Front impact

sensor

Supplemental

estraint

system control

module

(SRSCM)

Curtain airbags (CAB)

Side airbags

(SAB)

Belt pretensioners

Buckle switch Side impact sensor

Driver Airbag

Advanced

airbag system

Single threshold

Double threshold

Airbag system classification, layout

Belt pretensioners

(BPT)

Buckle switch (BS)

Supplemental

restraint

system control

module

(SRSCM)

Driver airbag (DAB) Passenger airbag

(PAB)

Single sensor type

Multi sensor type Passenger presence detection (PPD)

Passenger airbag

deactivation switch (PAD)

Passenger airbag

PSBIntegrated ECU

PSBIntegrated ECU

Steering

Angle

Brake

Pressure

AX, AY,

Yaw, …

Chassis CAN

LDWS

Basic Sensors & Systems

System Layout

Inputs and outputs (I/O) Driver airbag

Passenger airbag

Side airbags

Curtain airbags

Belt pretensioner

Buckle retractor

pretensioner

Airbag warning

lamp

Passenger airbag

deactivation lamp

Crash output to BCM/ETACS

K-Line

Battery (+)

Seat buckle switch

Front impact sensor

Side impact sensor

Passenger airbag

Deactivation switch

or

Single threshold

Double threshold

Passenger presence

detection

Passive occupant

detection system

(PODS)

Seatback

pushes torso

forward

Head remains stationary

due to inertia

Active head rest

Belt pretensioner, buckle rectractor, Isofix seat for kids

Ball chamber

Steel balls

Gear

Shaft

Steel cable

Cylinder

Piston

Ball type

Cylinder type Buckle rectractor pretensioner

Isofix child seat

Isofix

Lower anchorage type Top tether type

Additional belt

Isofix anchor Release lever

Bracket Frame

Crumple zones

Strength improvedStrength improvedStrength improvedStrength improved

Corner area Ring frame

Cowl area

C-pillar area

Material strength

NCAP Test & marks

= 10% or less poss. Heavy injuries

= 11% to 20% ~

= 21% to 35% ~

= 36% to 45% ~

= 46% or higher ~

http://www.euroncap.com/h

ome.aspx

New Car Assesement Program

NTHSC tests & marks

http://www.safercar.gov

National

Highway

Traffic

Safety

Administration

Government of the USA

Buckles, seat belts

Air bags

All kind of acidents, roll

over

Tires

Child safety

PHILOSOPHY CORPORATIVE PHILOSOPHY VISION

We announced "Innovation for Customers" as our mid–to long–term vision with five

core strategies: global orientation, respect for human values, customer satisfaction,

technology innovation, and cultural creation. We desire to create an automobile culture

of putting customer first via developing human–centered and environment–friendly

technological innovation.



Hyundai Design - Design Process


Hyundai Technology





Nano technology glass, wiper less



Hyundai Technology - Safety

Securing the highest safety ratings


Hyundai Technology – Pre crash Safety

Vehicle Stability Management



Lane Keeping Assist



Computer aided and simulations crashes


Hyundai Technology – Environmentally friendly

Vehicle for the future - now


Thank you kindly

Yours Hyundai Auto Beograd

Miodrag B. Stojanovic

Documents

Active & passive safety systems on Hyundai vehicles ... · Active & passive safety systems on Hyundai vehicles; Development & strategy Road Safety conference, Belgrade April 27 th