Bosch VCU Manual page 66

11 | Analog and Frequency Inputs
11.4.1 Special functionality: Vehicle speed
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d) Enter threshold value when state changes from A to B.
e) Enter delay time when state changes from A to B.
f) Enter output value of state B in the unit selected in b).
g) Enter threshold value when state changes from B to A.
h) Enter delay time when state changes from B to A.
i) Enter time when the hysteresis function is activated after vehicle´s startup.
j) Enter the channel´s state (A or B) at startup.
3. Click 'Next' when done.
The second part of the 'Hysteresis Wizard' opens.
4. Click 'Finish' when done.
5. Enter channel name and description.
6. Click 'OK' when done.
The channel is inserted into the Vehicle Control Unit VCU Project Tree.
Channels available
in Computed sources
Available
measurements
for channel
This functionality allows:
– high performance vehicle owners to measure wheel spin under acceleration and
wheel slip/lock under braking.
– calculating vehicle 'speed over ground'.
Vehicle speed calculation function
– Calculating vehicle speed of 2 wheel drive: (Wheel speeds of non-driven axle as input)
Vehicle_Control_Unit_VCU_Manual
Choose data type of
the measurement variable
Check the box to force the
channel's quantization if the
quantization should be a fixed
value in the whole CAN system
Enter name to automatically
create a new measurement sheet
Calculation of hysteresis
channel
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