Einrichtung zum Auswerten von Fahrzeug-, Antriebs- und Betriebsparametern

摘要

A system for evaluating vehicle drive and operation parameters enables a gear speed ratio to be selected and adjusted according to predetermined calculation rules, characteristic values or characteristic fields by means of a microprocessor. An acceleration of the vehicle is calculated from the number of revolutions of a drive train comprising engine and gear, the number of revolutions corresponding to the driving speed. The object of the invention is to provide a uniform system for different gear types which requires only a few parameters adapted to the vehicle for selecting speed ratio and shift gear. This object is attained in that a minimum dwelling time ( DELTA tF) is associated to each speed ratio range. An adjustment time ( DELTA tZ) is further associated to each speed ratio change ( DELTA ig). This adjustment time is the average time required by the gear to complete each speed ratio change ( DELTA ig). A change in the number of revolutions ( DELTA nb, DELTA nZ) of the engine during the minimum dwelling time ( DELTA tF) and adjustment time ( DELTA tZ) is calculated from these times, taking into account the vehicle acceleration (a). The speed ratio change ( DELTA ig) to be carried out is calculated from a set number of revolutions (nset) or a shift gear number of revolutions (nshift) and is carried out when the real number of revolutions (nreal) exceeds the shift gear number of revolutions (nshift).