Patent ID: 6363795
Filing Date: 2002-04-02
Classification: B67D,G01D,G01F

Abstract:
An apparatus for generating signal changes when determining an amount of fuel dispensed from a fuel pump unit, comprising:a frequency generator having a circumference and a plurality of poles on the circumference, the frequency generator which is adapted to generate a periodic signal having a frequency emitted in dependence on a volume flow of the fuel and from the plurality of poles on only the circumference of the frequency generator; and a pulse-generating device adjacent to the plurality of poles and includes at least analog sensor and at least signal processing unit, the pulse generating device which is adapted to detect the signal from the frequency generator and to emit at least one signal in dependence on the frequency, wherein the frequency generator is adapted to emit an analog signal, the at least one analog sensor for detecting an amplitude of the analog signal and the at least one signal-processing unit is adapted to compare an amplitude of the analog signal with a number of predetermined amplitude values, and to perform a signal change when a predetermined amplitude value has been reached to generate, based on the amplitude of the analog signal, signal changes having a frequency, which is dependent on and higher than the frequency of the analog signal.