| | Method for avoiding fraud on a taximeter or tachograph - Patent 6109520 |
 | | The dashboard is in that case conventionally equipped with an auxiliary output, which is electrically connected in parallel on this cable, and on which is connected the corresponding input of the taximeter: the pulses which are conveyed on this cable therefore supply the speedometer of the vehicle and the taximeter simultaneously. |
 | | The situation is relatively similar concerning the tachographs with which trucks or lorries must obligatorily be fitted and which, as is known, serve at least to register on a disc the speed of the truck, the miles covered and the driver's work time. |
 | | On the contrary, in the case of a tachograph, the defrauder's apparatus is then adjusted to deliver pulses of frequency 1.2 times less than that of the pulses of the sensor and, for the tachograph, everything happens as if the truck were advancing at a speed 1.2 times less than its real speed. |
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