Self-Study Programme 26 Octavia Vehicle safety.pdf

(1500 KB) Pobierz
SP 26-5
Technical progress in vehicle engineering is constantly
perfecting vehicles in terms of active safety and is helping, more
than ever, to prevent or minimise the consequences of accidents
in the passive field.
Our safety engineers have implemented further measures in
terms of active and passive safety in the
Š
KODA OCTAVIA.
For instance, the antilock brake system has been equipped with
additional functions, the existing safety system of airbag and seat
belt tensioner has been enlarged to include side airbags for driver
and front passenger.
The anti-theft alarm system also now features additional
components.
We wish to present the design of these modified systems in this
Self Study Programme and to explain how they operate
.
2
Contents
ABS
Antilock brake system
System overview
ABS + EBD
Electronic brake force distribution EBD
ABS Sensors
ABS Actuators
ABS
Brake function with antilock control
EDL
Function description
ESBS
EBC
CAN BUS
ABS Self Diagnosis
ABS Service
ABS/EDL Function Diagram
Pedal Assembly
ABS Knowledge
Side Airbags
Task and function
Service work
Self-diagnosis
Function diagram
Alarm System
Test Your Knowledge
Service
xxxxxxxxxxxxxxxx
OCTAVIA
4
4
5
7
7
8
11
12
12
16
18
22
24
25
26
27
28
30
31
32
32
34
35
36
38
44
Service
xxxxxxxxxxxxxxxx
OCTAVIA
Service
xxxxxxxxxxxxxxxx
OCTAVIA
Service Service
xxxxxxxxxxxxxxxx
OCTAVIA
xxxxxxxxxxxxxxxx
OCTAVIA
Service Service
xxxxxxxxxxxxxxxx
OCTAVIA
xxxxxxxxxxxxxxxx
OCTAVIA
Srie
evc
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXXXXXXX
XXXXXXXXXXXXXXX
XXXXXXXX
You will find notes on inspection and
maintenance, setting and repair instructions
in the Workshop Manual.
3
ABS
Antilock brake system - ABS
SP26-1
ABS unit
Wheel sensor
Brake pressure line
Sensor line
You will be familiar with the operation and
design of the antilock brake system MK20
from the
Š
KODA FELICIA.
The tried-and-tested self-contained hydraulic
modular system of the 4-channel version has
now been enlarged in the
Š
KODA OCTAVIA to
include electronic controls and solenoid
valves which make it possible to integrate
additional functions in respect of vehicle
dynamics.
The ABS unit
ABS/EDL-ITT Mark 20IE
differs externally by the hydraulic unit which
is 30 mm longer to accommodate the
additional valves (dimension a = 130 mm).
We recognize from the designation IE that this
unit has been enlarged and that the control
unit is linked to the CAN BUS drive.
Electric motor
Hydraulic unit
a
SP26-26
Electronic control unit
4
ABS system overview
(block diagram)
G45
K47
K14/33
G44
J104
V64
N55
F
G47
G46
SP26-25
Abbreviated designation of
components - see function diagram
Brake circuit
Brake circuit
Outgoing information
Incoming information
The brake circuit is split, as before, into an X
arrangement, also known as a diagonal split.
Each brake circuit acts on a front wheel and on
the diagonally opposite rear wheel. A separate
brake line runs from the hydraulic unit to each
wheel (4-channel version).
The relevant ABS sensor system consists of
the four wheel speed sensors (G44 to G47)
with pulse rotors.
The new additional functions which the
system permits, are:
EBD
EDL
EBC
TCS
Electronic brake pressure distribution
Electronic differential lock
Engine braking control
Traction control system
Faults in the ABS-specific range are indicated
by means of the ABS warning light (K47) and
by the brake fluid level warning light (K14/33).
The entire system is covered by the self-
diagnosis.
(EBC and TCS are in preparation for the
OCTAVIA).
5
ABS
Installation position
The brake servo unit with tandem brake
master cylinder and the ABS unit are two
separate components.
As on all
Š
KODA models, the brake servo
system employs the vacuum servo assistance
principle, in other words a tried-and-tested
technical and economic solution (left-hand
drive models with 10” brake servo unit).
The ABS unit is a separate module which is
attached to the wheelhouse in the left of the
engine compartment. This installation
position is the same for left-hand and right-
hand drive models (right-hand drive models
then have the separate 7”/8” brake servo unit
on the right of the engine compartment).
The tandem brake master cylinder is
connected to the ABS unit by flexible brake
lines.
SP26-3
Brake servo
unit
Tandem brake
master cylinder
ABS unit
Flexible brake lines
Hydraulic pump V64
Hydraulic unit N55
The ABS unit
can only be separated once it has been
removed.
The hydraulic pump must not, however, be
separated from the hydraulic unit.
Note:
Please refer to the information on
service work, in particular bleeding
the brake system fitted with ABS/EDL
Mark 20IE.
You will find this in the Workshop
Manual OCTAVIA Running Gear.
ABS control unit J104
SP26-31
6

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin