A METHOD FOR ESTIMATING TORQUE DOWNSTREAM OF A VEHICLE TRANSMISSION

摘要

A method for estimating torque (T; H) transmitted to a structure (32) located downstream of a transmission system (1) of a vehicle, the vehicle comprising an engine (2) for generating torque (M), the transmission system (1) being configured to transmit a fraction (W) of the torque (M) generated by the engine (2) to a plurality of wheels (3) of the vehicle and a further fraction (T + H) of the torque (M) generated by the engine (2) to said structure (32), the transmission system (1) comprising: a shaft arrangement (12) interposed between the engine (2) and said structure (32); a planetary gearing (22) supported by the shaft arrangement (12); a transmission unit (5) arranged in parallel to the shaft arrangement (12); wherein the torque (T; H; W) transmitted to said structure (32) is estimated on the basis of a group of parameters comprising: torque (M) upstream of the transmission system (1); twist (&Dgr;Θ) of the shaft arrangement (12); a parameter (a) which is indicative of the ratio between an output rotational speed at an output of the transmission unit (5) and an input rotational speed at an input of the transmission unit (5).