Anti-Lock Braking Systems ppt

Anti
-
Lock Braking Systems
Anti
-
Lock

Braking

Systems
Branden L. Jones, CSP, OHST
Manager - EH&S
Texas New Mexico Power
Fort Worth, Texas
Pop Quiz
Pop

Quiz
• Does Anti-Lock
B k S t (ABS)
B
ra
k
e
S
ys
t
em
(ABS)

usage follow

conventional driver
conventional

driver

training?
• Is ABS usage on
cars and trucks the
same?
•
Do you address
•
Do

you

address

ABS in Defensive
Drivin
g
Courses?
Anti-Lock Braking Systems 2
g
Quiz Answers
Quiz

Answers
•NO• Does Anti-Lock
B k S t (ABS)

B
ra
k
e
S
ys
t
em
(ABS)

usage follow
conventional driver
•NO
conventional

driver

training?
• Is ABS usage on
??
cars and trucks the
same?
•
Do you address
•
??
•
Do

you

address

ABS in Defensive
Drivin
g
Courses?
Anti-Lock Braking Systems 3
g
Mini Train
-
the
-
Trainer
Mini

Train
the
Trainer
• Basic Functions of
ABS Systems
• Driver Instructions
for Cars and Light
Trucks
Di I t ti
•
D
r
i
ver

I
ns
t
ruc
ti
ons
for Heavy Trucks
Reso rces for
•
Reso
u
rces

for

Defensive Driving
Program Integration
Anti-Lock Braking Systems 4
Program

Integration
Basic Functions of ABS
Basic

Functions

of

ABS
• Physics 101: Static

Friction is Greater
than Moving Friction
• ABS IS Computer
Controlled Brake
Pedal
“
Pumping
”
Pedal

Pumping

• ABS Allows the
Driver To Maintain
Driver

To

Maintain

Control During Hard
Brakin
g
Anti-Lock Braking Systems 5
g
Vehicle ABS System
Vehicle

ABS

System
• Speed Sensors on
Wheels are
Monitored by On
Board Computer
Board

Computer
• Radical Speed
Differences Trigger
Differences

Trigger

ABS Action
•
ABS
“
Pumps
”
the
•
ABS

Pumps

the

Brakes 18 Times
p

er Second
Anti-Lock Braking Systems 6
p
Vehicle ABS System
Vehicle

ABS

System
• ABS Systems
“Counte
r
-Intuitive”
Operations
Gi di S d
–
G
r
i
n
di
ng
S
oun
d
s
from All Wheels
–
Pulsating or Soft
Pulsating

or

Soft

Brake Pedal
– Driver Can Still Steer
(with Reduced
Effect)
Anti-Lock Braking Systems 7
Video Clip
Video

Clip
• “America Brakes for
Safety”
– ABS Education
Alliance
Alliance
Anti-Lock Braking Systems 8
Driver Education (Cars)
Driver

Education

(Cars)
• STOMP on the Brake Pedal
• STA
Y
on the Brake Pedal with Steady Pressure

• STEER to Avoid Collision
• “Pumping” the Brake Pedal STOPS ABS Systems
fOtiP l(ON
OFF
ON
OFF
ON
OFF)
Anti-Lock Braking Systems 9
f
rom
O
pera
ti
ng
P
roper
l
y
(ON
-
OFF
-
ON
-
OFF
-
ON
-
OFF)

Video Clip
Video

Clip
• “America Brakes for
Safety”
– ABS Education
Alliance
Alliance
Anti-Lock Braking Systems 10
Driver Education (Trucks)
Driver

Education

(Trucks)
• Single Vehicle
Configuration
• All Wheels
STOMP STAY
–
STOMP
,
STAY
,
STEER
•
Tractor
-
Trailer

Tractor

Trailer

Configuration
• Any Combination
– Brake Steadily and
Evenly
•
Back
-
off Brakes to
Anti-Lock Braking Systems 11
•
Back
-
off

Brakes

to

Maintain Control
Video Clip
Video

Clip
• “ABS Driver
Training”
–US DOT

Anti-Lock Braking Systems 12
ABS Maintenance Issues
ABS

Maintenance

Issues
• Most Common
Issues
– Loose Wiring
Wh l S d S
–
Wh
ee
l

S
pee
d

S
ensor
Pickup and
Calibration
• Other Possibilities
–
Modulator Valve
Failure
– Electronic Control
Unit Failure

Anti-Lock Braking Systems 13
Unit

Failure
Video Clip
Video

Clip
• ABS Maintenance
–US DOT
Anti-Lock Braking Systems 14
Driver Training Integration
Driver

Training

Integration
• ABS Systems Differ
from Traditional
Braking Training
• Items to Incorporate
– Basic Function of
ABS Systems
ABS

Systems
– How to Drive and
Brake with ABS
– What Happens when
ABS Engages

EhiSti!
Anti-Lock Braking Systems 15
–
E
mp
h
as
i
ze
St
eer
i
ng
!
Educational Resources
Educational

Resources
• Educational
Resources
– Super Cheap!!!
ABS Ed ti Alli
•
ABS

Ed
uca
ti
on
Alli

ance
– Videos, Trainer Packages,
Brochures, etc.
http://www abs
–
http://www
.
abs
-
education.org/index.html
• Federal Motor Carrier Safety
Administration
Administration
– Videos, Cirriculum
– />fetyprogs/brakesaft htm
Anti-Lock Braking Systems 16
fetyprogs/brakesaft
.
htm
Questions?
Questions?
Thanks!