Method and device in vehicle control system, and system for error diagnostics in vehicle
AssigneeThoreb AB
InventorThore Brynielsson
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Abstract
The invention relates to a method of storing information in the form of signals from a control system in a vehicle, said method comprising the step of reading a signal on recurrent sampling occasions and increasing the value of a counter which represents a signal value interval. The method further comprises the steps of measuring on each sampling occasion a change of the signal in relation to a previous signal value, comparing change with the threshold value, and, if the change is greater than the threshold value, increasing the value of a counter associated with this threshold value.
Claims19
A method of storing information in the form of signals from a control system in a vehicle, comprising:
- reading a signal on recurrent sampling occasions, and thereby obtaining a signal value;
- defining for at least one direction of change of the signal at least one threshold value;
- measuring on each sampling occasion a signal change in said direction of change by comparing a current signal value with a previous signal value;
- comparing said signal change with said threshold value;
- and
- if said signal change is greater than said threshold value, increasing the value of a counter associated with said threshold value.
A device for storing information from a control system in a vehicle, said control system comprising at least one transducer means arranged to generate a signal which represents a state of a physical quantity, said device comprising:
- sampling means for reading the signal at recurrent sampling intervals and thereby repeatedly obtaining a signal value;
- a counter associated with a threshold value defined for at least one direction of change;
- and
- processing means arranged to measure at each sampling interval a signal change in said direction of change, and, if the signal change is greater than said threshold value, to increase the value of the counter associated with said threshold value.
Dependencies are inferred from the claim text.