Device for determining running variables in a motor vehicle

An apparatus for determining running variables in a motor vehicle, comprising:

• respective sensors to detect longitudinal and transverse acceleration of the motor vehicle and to generate corresponding sensor signals, each sensor having a signal output, and
• an evaluation circuit with:
• a resettable time measuring unit comprising an operating time counter which determines calculated acceleration values from the respective sensor signals over a period of time,
• a signal divider connected to the signal output of each respective acceleration sensor to separate from the particular sensor signal a low-frequency signal component output characterizing the vehicle acceleration and a high-frequency signal component output,
• an adder connected to the respective low-frequency output of each of the signal dividers for the vectorial addition of the low-frequency components of each of the signals corresponding respectively to each one of a longitudinal acceleration component (X) and a transverse acceleration component (Y),
• a storage unit connected to the adder and to the time measuring unit to store the calculated acceleration values over the measured time, and
• a control unit connected to the high-frequency output of each of the signal dividers to control the time measuring unit.