Automatic Systems - Hyundai Body Builder 2015 Manual

INTRODUCTION PRELIMINAR STUDIES AND CONSIDERATIONS
MOUNTING AND CONSTRUCTION
7.7.4

Automatic systems

In vehicles supplied by HMC, there are a number of automatic systems that facilitate
driving and help to improve safety. In certain circumstances, the Body Builder may
use these systems to implement the functions of the body or to improve the vehicle
performance. It should take into account the guidelines provided in this manual in
order to not alter the operation of any of these systems, which could cause mal-
function of the vehicle. Some of the most important systems are:
Driving performance systems
VEHICLE DYNAMIC CONTROL SYSTEM - VDC
The VDC system is a driving aid that offers security by applying the brakes auto-
matically, to prevent the vehicle from losing trajection. It works very effectively
and protects against sudden skids of the front axle, the rear axle or both together,
minimising its impact and helping to restore the direction the driver ordered with
the steering wheel.
The VDC instantly detects any difference in rotational speed between the wheels
of the vehicle. By knowing that a wheel is rotating at a different speed from the
other, the control unit intended for this system knows immediately what kind of
slippage is occurring (understeer or oversteer) and acts by selectively braking
individual wheels to reduce the slip and recover the path. All this occurs in tenths
of a second.
When making modifications to vehicles equipped as standard with the VDC system,
we will have to consider the following recommendations and respect the prompts
contained in this manual. Otherwise the system might stop working properly,
which could cause loss of control of the vehicle and result in an accident. Accord-
ingly:
- No kind of modification or manipulation of the VDC, whether in the control unit
or in the sensors that make up the system, is allowed.
- No changes in elements such as undercarriage, wheels, engine, steering sys-
tem, or any system that could provide erroneous readings to VDC system sen-
sors are allowed.
- The installation of systems and equipment that may cause vibrations near the
VDC sensors must be avoided, as this could cause incorrect readings.
- Attention must be paid to the modification of the wheelbase of the vehicle. This
must be within the limits allowed by HMC. If this is not the case, the VDC should
be disabled, because it will not work properly.
See chapter 2.3.5 "Wheelbase".
- The permitted gross vehicle weight must not be altered. This would produce an
incorrect reading of the system sensors.
ROLL OVER MITIGATION - ROM
Roll Over Mitigation (ROM) is an important system on a high-sided light commer-
cial vehicle, which reduces the chance of the vehicle rolling (laterally) during sud-
den turning. As it works together with the VDC system, the same rules apply.
V1.0, February 2015
MAINTENANCE AND DAMAGE PREVENTION
POWER TAKE-OFF
Body Builder Manual Part II, Specific Book LCV
ELECTRIC AND ELECTRONIC SYSTEMS
WORK ON BASIC VEHICLE
APPENDIX
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