User's Manual

TSS 2. Generation BMW
Tire Safety System TSS 2nd. Generation, BMW
Dept. BEE
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Document no.:
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modification:
Index:
Index:
3530.001.002.00.27
00
a
Bedienungsanleitung TSS BMW
User Manual TSS BMW
freigegeben am /date of release
8/31/05
3 Warning algorithm
The system monitors a nominal pressure, which is set by the operator, and a fixed set minimum warning pres-
sure. The higher value in each case is used to generate the breakdown warning.
The driver instructs the system to accept the current pressure values as the nominal pressure by using the
“Reset”. The reset is triggered by pressing a key or selecting a menu item.
3.1 Warning limit “Minimum pressure”
At this warning limit, a check is made against the minimum warning pressure P
Warning_MinimumPressure
, which is pro-
grammed into the system as a fixed value.
The minimum warning pressure for BMW amounts to 2.6bar abs plus an accuracy reserve of 0.1bar.
The corresponding warning bit is set, if the measured pressure lies below this threshold twice in succession.
3.2 Warning limit “Nominal pressure minus relative deviation”
(Nominal pressure – x %)
This warning limit is calculated from the nominal pressure less a relative deviation of 25% of the nominal pres-
sure. The nominal pressure is specified by the driver.
Again here an accuracy reserve of 0.1 bar is added to the warning limit.
The corresponding warning bit is set, if the measured pressure lies below this threshold twice in succession.