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EnglishAdvanced technology -> Rain sensor for your BMW 5 Series 1995-2003
180nIntegrated rearsuspension
Rain sensor*
When the "Intermittent" wiper speed
position is selected, the wiper reacts
immediately if water is splashed onto
the windshield from vehicles traveling
ahead, for example. As a result, the
rain sensor provides a contribution to
driving safety and comfort.
The control arms on the patented inte-
The rain sensor controls windshield
grated aluminum rear axle assembly are wiper operation, depending on how wet
not mounted directly on the body. They the windshield is.
are mounted elastically on a chassis
Infrared light is carried along the surface
sub-frame which is joined in turn with
of the windshield in an optical
elasticity to the vehicle body. The
conductor in such a manner that it is
resulting double elastic suspension
reflected completely when the wind-
system effectively absorbs the forces
shield is dry. The quantity of reflected
resulting from bumps and road surface
light is measured.
irregularities.
If there is moisture on the glass, the
The compliance rates of the integrated
rear axle assembly's control arm
mounts have been precisely calibrated
amount of light reflected is reduced
since the infrared light at the surface
of the windshield can escape. The
to help provide supplementary adjust-
quantity of reflected light is thus a
ment in the tracking angle of the rear
means of gauging the degree of
wheels (programmed self-steer effect).
wetness on the windshield.
The ultimate result is enhanced safety
and control under all conditions.
