Gear ratio changing or disengaging method for hybrid vehicle, involves controlling clutch such that heat engine transmits compensation torque to main shaft via clutch, when electric machine introduces parasite torque in degraded mode

摘要

The method involves calculating a parasite torque (Cp) generated by an electric machine (7). A position of a clutch is calculated according to the parasite torque using a map. The clutch is positioned in the calculated position. The clutch is controlled such that a heat engine transmits a compensation torque (Cc), which is equal to the parasite torque, to a main shaft (18) via the clutch, during engaging or disengaging a gear ratio, and when the machine introduces the parasite torque in a degraded mode.