Abstract

Traditionally a gear shift with clutch control makes the synchronisation phase unnecessarily long torque gap time. Gear shifting by engine control realizes fast gear shifts by controlling the engine instead of sliding the clutch to a torque-free state in the transmission. Detailed mathematical models of different driveline states are presented and to improve driving comfortable. Theoretical analysis results are compared with experimental ones from the road experience in equal conditions in order to prove the validity of the gear shifting control strategy.

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