Method for triggering a switching function

Claim 1

A method for triggering at least one switching function in a vehicle driven by an internal combustion engine having an element which determines the power of the engine and has at least one mechanical end stop, the triggering of the switching function being in dependence upon a signal of a position transducer of said element and with said transducer providing an end stop position signal corresponding to said end stop, the method comprising the steps of: storing start values (P1S, P2S) of the position signal in a read-only memory for correcting and scaling said end stop position signal; said start values (P1S, P2S) corresponding to position signal values in the vicinity of said one end stop which are passed through when said end stop is approached; transfering said start values from said read-only memory into a read-write memory (17) of a signal processing arrangement (15) as the end values (P1, P2) representing end stop; comparing the actual positioning signal (P) with stored end values in the signal-processing arrangement 15; overwriting one of the stored end values with the actual value of the position signal when the latter exceeds one of the end values; scaling the actual value of the position signal to a value which is determined from the stored end values (P - P1)/(P1 - P2); calibrating this scaled value to a signal value U of the output signal 18 of the signal processing arrangement 15 given by: ##EQU1## wherein said signal value U lies between a maximum value (Umax) and a minimum value (Umin); comparing the output signal 18 of the signal processing arrangement 15 in a comparator 20 to signal values (S1, S2) which can be stored or pregiven by potentiometers; initiating a switching function 24 in dependence upon a signal at the output 23 of said comparator 20; and, said comparator 20 generating an output signal when the scaled and calibrated actual position signal exceeds or drops below one of the predetermined signal values.

Claim 2

A method for triggering at least one switching function in a vehicle driven by an internal combustion engine having an element which determines the power of the engine and has at least one mechanical end stop, the triggering of the switching function being in dependence upon a signal of a position transducer of said element and with said transducer providing an end stop position signal corresponding to said end stop, the method comprising the steps of: storing start values (P1S, P2S) of the position signal in a read-only memory for correcting and scaling said end stop position signal; said start values (P1S, P2S) corresponding to position signal values in the vicinity of said one end stop which are passed through when said end stop is approached; transfering said start values from said read-only memory into a read-write memory (17) of a signal processing arrangement (15) as the end values (P1, P2) representing end stop; comparing the actual positioning signal (P) with stored end values in the signal-processing arrangement 15; overwriting one of the stored end values with the actual value of the position signal when the latter exceeds one of the end values; scaling the actual value of the position signal to a value which is determined from the stored end values (P - P1)/(P1 - P2); calibrating this scaled value to a signal value U of the output signal 18 of the signal processing arrangement 15 given by: ##EQU1## wherein said signal value U lies between a maximum value (Umax) and a minimum value (Umin); comparing the output signal 18 of the signal processing arrangement 15 in a comparator 20 to signal values (S1, S2) which can be stored or pregiven by potentiometers; initiating a switching function 24 in dependence upon a signal at the output 23 of said comparator 20; and, said comparator 20 generating an output signal when the scaled and calibrated actual position signal exceeds or drops below one of the predetermined signal values.