Haldex DGX ABS

Haldex
DGX
ABS
000 700 212 /11.99. / Redditch
DGX ANTI-L
OCK BRAKING SY
STEM FOR
ANTI-LOCK
SYSTEM
TR
UCKS
CT
ORS
ORS,,
TRUCKS
UCKS,, TRA
TRACT
CTORS
BUSES AND CO
ACHES
COA
ABS braking is no longer the province of privileged performance cars. It is
vital safety equipment for all vehicles - especially heavy road users like the
commercial sector. A fact increasingly recognised by legislation, which makes
it mandatory for a wide range of commercial vehicles to be fitted with
approved ABS systems.
When it comes to specifying ABS equipment for your vehicles, Haldex is
unquestionably the safest choice of all. Pioneers in the field and a market
leader, Haldex sets the standards of excellence and innovation in ABS
technology.
Total Braking Assurance
DGX is the product of many years’ development, combining the well proven
Haldex memory controlled relay valve and advanced microprocessor
technology. The result is an ABS system unsurpassed in performance and
reliability.
The safety benefits are truly significant. DGX minimises stopping distances
and prevents jack-knifing, loss of steering control and maintains stability in
both articulated and rigid vehicles. Above all it provides ultra safe braking
even on split-friction road surfaces.
Cost Efficient
As well as bringing peace of mind to
drivers, DGX also pays dividends to
the operator. Greatly improved
vehicle handling means fewer accident
repair bills and insurance claims.
While the elimination of wheel-lock
naturally brings much longer tyre life.
TRACTOR UNIT
RIGID VEHICLE
Outstanding Reputation
Haldex has an impeccable pedigree in the automotive industry. In 1998 Haldex
acquired Midland-Grau which was formed from four highly respected
companies in the air brake industry. These four companies merged and pooled
their resources to provide an unrivalled product range and level of service to
truck and trailer manufacturers, operators and repairers.
The companies were Graubremse of Germany, a major air brake and air
suspension control supplier to Europe’s principal truck manufacturers; Berg of
Britain, a prominent supplier of original equipment for most UK and
continental trailer manufacturers and the air brakes controls division of Lucas
Girling, market leader in the development and manufacture of commercial
vehicle ABS, and Midland Inc., a leading US supplier of O.E. and after-market
truck and trailer components.
Rigorously Tried and
This tradition of engineering excellence, innovation and resources has
Tested
produced the tried and tested GX, MGX, DGX, Modal and Modular ABS
systems and has made Haldex the undisputed leader in ABS braking innovation.
All DGX components are tested for
performance and reliability, step-byThe Forefront of Development
step throughout their assembly.
For example, every SPS valve
The security of lives and cargo is not a matter Haldex takes lightly. The Haldex
undergoes 19 different tests in a
range represents the leading edge of ABS technology, produced out of many
highly advanced computer-controlled
years’ experience and research. A substantial proportion of company turnover
rig which simulates normal braking
is re-invested in product development. State of the art CAD/CAM equipment
and ABS functions under all
is used in the design of new ABS systems prototypes are produced in Haldex
conditions.
own mechanical and electronic research laboratories, before stringent field
Completed ECU circuit boards are
testing. Drivers can be confident of braking performance in all conditions,
submitted to stringent burn-in cycles
knowing that Haldex ABS has been tested in the most gruelling conditions,
which heat and cool the units under
such as on a frozen lake in Sweden in extreme weather and at one of the best
severe temperature conditions
equipped multi-surface proving grounds in Europe.
between +80°C and -40°C.
Only when the DGX unit has passed
Purpose Built Assembly Plant
each of these tests will it be used for
on-line installation.
Because new technology and design quality must be faithfully reproduced in the For every ECU, a detailed test record
manufacturing process, Haldex has dedicated an entire new factory to the
is built up as it progresses through
production of ABS systems.
production. This is kept on file at
Huge investment has been made in manufacturing facilities for mechanical,
Haldex for 15 years, so accurate
electronic and electrical components. New equipment and methods have been reference can always be made to each
carefully introduced to increase quality and efficiency. Under environmentally
particular unit.
controlled conditions, the electronic components are assembled in what is now Evidence indeed of the Company’s
one of the most advanced electronic assembly centres in the industry.
confidence in the engineering
excellence of their products.
How the System
Operates
DGX is a four channel anti-lock
system designed to operate on
powered vehicles.
The speed of each sensed wheel is
determined via sensors and hub
mounted exciters. These inputs are
fed to an ECU where two microprocessors cross check the
information and generate a vehicle
reference speed, which is used to
monitor the speed of individual
wheels. When the vehicle brakes are
applied, the electronic Control Unit
(ECU) immediately detects any
impending wheel-lock condition
and sends a signal to the Skid
Pressure Sensitive valve (SPS) to
reduce the braking pressure of the
wheel or wheels concerned.
Following the initial ABS cycle, the
SPS valve is continually updated
with a memory pressure, which
relates to the pressure at which the
previous wheel-lock started to
occur. The SPS valve uses this
information to provide a two stage
re-apply. Initially, braking pressure is
increased rapidly (fast re-apply) to a
level just below wheel-lock (the
memory pressure), at which point
the brake pressure increase is
restricted (slow re-apply) to avoid
overshoot and optimise braking
adhesion. This is repeated many
times a second, ensuring smoothly
applied maximum braking and linear
tyre adhesion down to 5kph or less.
THE SAFEST WAY TO ST
OP IN ALL WEA
THSTOP
WEATHERS AND R
OAD CONDITIONS
RO
These diagrams show the 3 most common consequences of wheel-lock caused
by over-braking: jack-knifing, loss of steering control and rigid vehicle spin.
Total Control on Split-Friction Surfaces
Oil patches, ice, rain and rubber from tyres on the road surface create
split-friction conditions which present a dangerous emergency braking
hazard even on straight roads. This is where DGX comes into its own.
Because each wheel is controlled independently, braking is as smooth and
controlled as if on a perfect road surface. The modified front axle control
provided by DGX ensures smooth and controllable steering during
braking on split-friction surfaces.
Dual Safety System
At the heart of the DGX system is
the ECU, which continuously monitors individual wheel speeds and so
controls dangerous braking situations.
To make doubly sure of correct
information, the ECU contains two
advanced microprocessors,
whichsimultaneously check and cross
check data to ensure maximum system
integrity and operational reliability.
Unique On-Board Diagnostics
Unrivalled reliability has been designed into the DGX system from the very start, DGX features a solid state
ECU and a minimum number of moving parts.
To maintain the system at optimum performance, Haldex provides a unique low cost, on-board Diagnostic
Display Unit (DDU). It simply plugs into a special socket in the cab to check system functions and gives accurate
and fast diagnoses, in the unlikely event of any failures. Costly downtime caused by long hours of fault finding
through trial and error is a thing of the past.
AUSTRIA
Graubremse Wien Ges.m.b.H
Tel:
INT + 43 1865 16 40
Fax:
INT + 43 1865 16 4027
e-mail: [email protected]
BELGIUM
Haldex N.V./S.A.
Tel:
INT + 32 2725 3707
Fax:
INT + 32 2752 4099
e-mail: [email protected]
BRAZIL
Haldex do Brasil Ind. e Com. Ltda
Tel:
INT + 55 11 531 4159
Fax:
INT + 55 11 531 9515
e-mail: [email protected]
CHINA
Haldex International Trading (Shanghai) Co. Ltd.
Tel:
INT + 86 21 6289 4469
Fax:
INT + 86 21 6279 0554
e-mail: [email protected]
FRANCE
Haldex Europe S.A.
Tel:
INT + 333 88 68 22 00
Fax:
INT +333 88 68 22 09
e-mail: [email protected]
GERMANY
Haldex Brake Products G.m.b.H
Tel:
INT + 49 177 934 91 70
Fax:
INT + 49 177 934 91 740
e-mail: [email protected]
GREAT BRITAIN
Haldex Ltd.
Tel:
INT + 44 1 325 310 110
Fax:
INT + 44 1 325 311 834
e-mail: [email protected]
THE PR
OVEN R
OAD
PRO
RO
TO SAFETY
DGX is one of a series of market
leading Anti-lock Brake Systems from
Haldex, fitted to commercial vehicles.
Including not only tractors, trucks and
trailers, but emergency vehicles such as
fire appliances as well as buses and
coaches where passenger safety is
paramount.With their proven track
record and pre-eminence in ABS
technology, Haldex ABS is the safest
way to drive.
TOTAL SER
VICE
SERVICE
BACK-UP
At Haldex the quality of our products is matched by an equally high level of
service.Routine maintenance is made simpler, quicker and far less costly by use
of unique on-board diagnostics coupled with the Diagnostic Display Unit.
Haldex has a global network of Sales/Service Centres where an expert
engineers are available to advise on servicing Haldex ABS systems, or to train
OEMs and fleet operators in vehicle installation and maintenance.
POLAND
Haldex Sp z o.o.
Tel:
INT + 48 34 350 1100
Fax:
INT + 48 34 350 1111
e-mail: [email protected]
SOUTH KOREA
Haldex Korea Ltd.
Tel:
INT + 82 2 2636 7545
Fax:
INT + 82 2 2636 0728
e-mail: [email protected]
SPAIN
Haldex España S.A.
Tel:
INT + 34 9 3573 1030
Fax:
INT + 34 9 3573 0728
e-mail: haldexsa [email protected]
SWEDEN
Haldex Brake Products AB
Tel:
INT + 46 418 47 6000
Fax:
INT + 46 418 47 6001
e-mail: [email protected]
The Haldex Group is a global
supplier of proprietary products
for trucks, cars and industrial
vehicles, with special emphasis on
performance and safety.
The group is organised in divisions,
which focus on their respective
product niche.
USA
Haldex Midland Corp.
Tel:
INT + 1 816 891 2470
Fax:
INT + 1 816 891 9447
e-mail: [email protected]
The Haldex Group is a global
supplier of proprietary
products for trucks, cars and
industrial vehicles, with special emphasis on
performance & safety. Haldex is listed on the
Stockholm Stock Exchange.
Haldex Brake Systems supplies ABS and brake components for heavy vehicle air
brakes.
Haldex Midland Services supplies spare parts and re-manufactured components for
the heavy vehicle after-market.
Haldex Barnes Hydraulics supplies gear pumps and hydraulic systems for power
steering and lifting functions on industrial vehicles and trucks.
Haldex Garphyttan Wire supplies speciality steel-alloy wire products mainly for
applications in combustion engines.
Haldex Traction Systems supplies 4WD systems for cars and trucks.
Sales companies are established in Europe, North and South America and Asia.
Production takes place in 9 factories in USA, 9 factories in Europe and 1 joint venture
in India.
The Haldex Group is listed on the Stockholm Stock Exchange.