10
REVISED 5/31/05
are referred to as either an "under-steer" situation (where
there is a lack of vehicle response to steering input due to
tire slide on the steer axle) or an "over-steer" (where the
tractor's rear end slides out due to tire slide on the rear axle)
situation. Generally, shorter wheelbase vehicles (tractors,
for instance) have less natural yaw stability, while longer
wheelbase vehicles (straight trucks, for instance) have
greater natural yaw stability. Factors that influence yaw
stability are: wheelbase, suspension, steering geometry,
weight distribution front to rear, and vehicle track width.
Yaw Control
Yaw Control responds to a wide range of low- to high-
friction surface scenarios including rollover, jackknife
and loss of control. It is the recommended system for all
power vehicles and especially critical for tractors pulling
trailers. In the case of vehicle slide (over-steer or under-
steer situations), the system will reduce the throttle and
then brake one or more of the “four corners” of the vehicle
(in addition to potentially applying the trailer brakes), thus
applying a counter-force to better align the vehicle with an
appropriate path of travel.
For example, in an over-steer situation, the system applies
the “outside” front brake; while in an under-steer condition,
the “inside” rear brake is applied. (See Figure 12)
IMPORTANT SAFETY INFORMATION ABOUT
THE BENDIX
®
ESP
®
STABILITY SYSTEM
ESP May Reduce The Vehicle Speed
Automatically
ESP can make the vehicle
decelerate automatically.
ESP can slow the vehicle with or
without the operator
applying the brake,
and
even when the throttle is being
applied.
To minimize unexpected deceleration and reduce the risk
of a collision the operator must:
• Avoid aggressive driving maneuvers, such as sharp
turns or abrupt lane changes at high speeds, which
might trigger the stability system.
• Always operate the vehicle safely, drive defensively,
anticipate obstacles and pay attention to road, weather
and traffic conditions. ABS, ATC and ESP stability
systems are no substitute for prudent, careful driving.
Towing Doubles Or Triples May Reduce The
Effectiveness Of Stability Systems
ESP is designed and optimized for trucks and for tractors
that tow single trailers. If a tractor equipped with ESP
is used to power multiple trailer combinations (known
as “doubles” or “triples”)
the effectiveness of the ESP
system may be greatly reduced.
Extremely careful
driving is always required when towing doubles or triples.
Excessive speed and aggressive maneuvers, such as
sharp turns, sudden steering inputs or abrupt lane changes
should be avoided.
Limitations Of Stability Systems
The ESP stability system’s effectiveness may be greatly
reduced if:
• The load shifts due to improper retention, accident
damage or the inherently mobile nature of some loads
(for example, hanging meat, live animals or partially
laden tankers),
• The vehicle has an unusually high or off-set center of
gravity (CG),
• One side of the vehicle drops off the pavement at an
angle that is too large to be counteracted by a reduction
in speed,
• The vehicle is used to haul double or triple trailer
combinations,
• If very rapidly winding steering inputs are inputted at
high speeds,
• There are mechanical problems with suspension
leveling of the tractor or trailer resulting in uneven
loads,
• The vehicle is maneuvering on a high banked road
creating either additional side forces due to the weight
(mass) of the vehicle or a deviation between expected
& actual yaw rates,
• Gusty winds are strong enough to cause significant side
forces on the vehicle and any towed vehicles.
FIGURE 12 - YAW CONTROL EXAMPLE
A Real World Example Of How Yaw Control
Operates:
Excessive speed exceeds the threshold, creating a
situation where a vehicle is likely to spin and jackknife.
The Bendix
®
Yaw Control system reduces engine throttle
and selectively applies brakes to reduce the tendency
to jackknife.
Summary of Contents for X3-45 Multiplex
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL X3 COACHES PA1562 4th edition...
Page 13: ...Section 00 GENERAL INFORMATION 11 PA1562 FIGURE 16 METRIC US STANDARD CONVERSION TABLE 00005...
Page 14: ...Section 00 General Information PA1562 12 FIGURE 17 CONVERSION CHART 00006...
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Page 253: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
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Page 439: ...Forward and Rear Axle Carrier Diagnostic Flowcharts TP 99125 Issued 12 99 TECHNICAL BULLETIN...
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Page 500: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 4 ArvinMeritor Inc Issued 08 02...
Page 504: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 8 ArvinMeritor Inc Issued 08 02...
Page 526: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
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Page 941: ...Initial Installation Section 2 Initial Installation Installation 14 Maintenance Tips 15...
Page 965: ...Glossary Section 5 Glossary Glossary 39...
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Page 1197: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Page 1198: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Page 1221: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
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Page 1265: ...Section 23 ACCESSORIES PA1562 5 FIGURE 2 AUDIO VIDEO CONNECTIONS...
Page 1278: ...Section 23 ACCESSORIES PA1562 18 FIGURE 26 FUNCTIONING OF LAVATORY 23051...
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