BMW On-Board Computer Wartungshandbuch PDF herunterladen (Seite 100)

When riding on a slippery sur-

face, never snap the throttle

twistgrip fully closed without

pulling the clutch at the same

time. Engine braking torque can

cause the rear wheel to lock, with

a corresponding loss of stability.

BMW Motorrad ASC is unable to

control a situation of this nature.

Tyre pressure

monitoring RDC

with tyre pressure monitoring

(RDC)

OE

Function

A sensor integrated into each

tyre measures the air tempera-

ture and the air pressure inside

the tyre and transmits this in-

formation to the control unit.

Each sensor has a centrifugal-

force tripswitch that does not

enable transmission of the meas-

ured values until the motorcycle

has accelerated to above approx-

imately 30 km/h for the first time.

The display shows -- for each

tyre until the tyre-pressure signal

is received for the first time. The

sensors continue to transmit the

measured-value signals for ap-

proximately 15 minutes after the

vehicle comes to a stop.

The control unit can adminis-

trate four sensors, so two dif-

ferent sets of wheels with RDC

sensors can be alternated on the

vehicle. An error message is is-

sued if wheels without sensors

are fitted to a vehicle equipped

with an RDC control unit.

Tyre-pressure ranges

The RDC control unit differenti-

ates between three tyre-pressure

ranges, all of which are paramet-

erised for the motorcycle:

Tyre pressure within permitted

tolerance.

Tyre pressure close to limit of

permitted tolerance.

Tyre pressure outside permit-

ted tolerance.

Temperature

compensation

Tyre pressure is a temperature-

sensitive variable: pressure in-

creases as tyre temperature rises

and decreases as tyre temper-

ature drops. Tyre temperature

depends on ambient temperature

as well as on the style of riding

and the duration of the ride.

The tyre-pressure readings

shown by the multifunction

display are temperature-

compensated; the reference tyre

temperature for these readings

is always 20 °C. The air lines

available to the public in petrol

stations and motorway service

areas have gauges that do not

compensate for temperature; the

reading shown by a gauge of

this nature is the temperature-

dependent tyre pressure. In

6

98

z

Engineering details

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