Power train control system

A power train control system connected to a prime mover (5), controlled by a prime mover governor (2), with the prime mover being connected to a continuously variable transmission (7) which is controlled by a ratio control (3), the power train control system comprising:

• a combination of a transmission output speed governor (9) and a governor (10) for relief of the prime mover, and the power train control system (1) comprising means for issuing a theoretical prime mover speed n_mot_nom to the prime mover governor (2) and for issuing a theoretical transmission ratio i_nom to the ratio control (3);
• the transmission output speed governor (9) receiving, as a control variable inputs, the transmission output speed n_out, a load signal p_vol and a theoretical transmission output speed n_out_nom and outputting, as a manipulated variable of the transmission output speed governor (9), the theoretical prime mover speed n_mot_nom;
• the governor (10) for relief of the prime mover receiving, as a control variable inputs, the speed n_mot of the prime mover (5), an initial transmission theoretical value i—0_nom, and the theoretical prime mover speed n_mot_nom of the prime mover (5), and outputting, as a manipulated variable of the governor (10) for relief of the prime mover, a theoretical transmission ratio i_nom and determining a transmission ratio correction value Δi, with the theoretical transmission ratio i_nom being calculated by adding the correction value Δi to the initial transmission theoretical value i—0_nom;
• and
• the initial transmission theoretical value i—0_nom is determined as a function of the theoretical prime mover speed n_mot_nom of the prime mover (5) and the theoretical transmission output speed n_out_nom.