WABCO TEBS E, Руководство пользователя

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TEBS E
7
External systems
127
7.1.1 TailGUARD functions
Vehicle type
All trailer vehicles
Purpose
Detecting objects out of the driver's field of vision behind the trailer with ultrasonic
sensors.
Benefit: Avoiding cost-intensive damage on vehicle, ramp and loading area.
• On towing vehicles with automatic transmissions, the accelerator pedal must be
released on time, otherwise passing the stopping point may occur if the towing
vehicle increases engine power when braking with TailGUARD.
• The TailGUARD system does not relieve the driver of the responsibility of
checking the rear when reversing. A guide is always necessary.
• Extreme weather conditions e.g. heavy rain or snowfall, can lead to the re-
stricted functionality. Objects with very soft surfaces cannot be detected under
all circumstances. WABCO cannot hold liable for an accident that is caused de-
spite of using this system; this is a support system only.
• If a ramp is approached at an oblique angle, the sensors may be unable to de-
tect the ramp.
Function
TailGUARD is activated by shifting into reverse gear. Activation will cause the
clearance lights on the trailer to be actuated via ELEX and flash. The flashing fre-
quency is increased the closer the vehicle is to the object.
If the parameterised stopping distance is reached, the vehicle will be braked for 3
seconds and then brake will be released. The stopping distance can be set via di-
agnosis (between 30 and 100 cm for TailGUARD
light
; between 50-100 cm for
TailGUARD, TailGUARD Roof and TailGUARD
MAX
).
If TailGUARD initiates automatic braking, at the same time a demand for actuating
the brake lights will be sent via ISO 7638 CAN interface to the towing vehicle. New
trailer vehicles support this function and activate the stop light.
During this time the clearance lights are switched on permanently. The braking
pressure of the trailer EBS E is defined by ELEX depending on vehicle speed and
the distance to the object measured by the ultrasonic sensors.
Provided the speed is below 9 km/h the brake is activated only for the final stop of
the vehicle in front of the ramp.
If the vehicle approaches the ramp at a speed below 9 km/h, the system triggers
short brake pulses to alert the driver of excessive speed and regulates the speed
down to 9 km/h. If the warning brake actions are ignored and the speed continues
to increase, the system is switched off at 12 km/h.
After automatic braking the driver can perform an automatic reset. The distance in-
formation will be sent to the towing vehicle by means of ELEX and TEBS E via
PLC (Power Line Communication) and can be displayed via Trailer Remote Control
for the driver. Furthermore, the communication occurs via ISO 12098 CAN inter-
face ‘Towing vehicle’ (actuation of the clearance lights).
Silent mode: If a buzzer is connected it can be deactivated temporarily via engag-
ing the reverse gear twice within 3 seconds, e.g. when making deliveries in resi-
dential areas.