Clutch configuration for multi-motor hybrid speed continuous power transmission

By combining a multi-electric motor system with an engaging clutch, the problem of power loss during gear shifting in commercial vehicles is solved, achieving efficient power transmission, adapting to the high torque requirements of heavy vehicles, and improving vehicle efficiency and acceleration performance.

CN115943090BActive Publication Date: 2026-06-26ALLISON TRANSMISSION INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ALLISON TRANSMISSION INC
Filing Date
2021-04-30
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The transition of commercial vehicles from fossil fuels to electricity faces challenges such as high torque demands and power losses. In particular, the power loss of electric motor transmissions is significant during gear shifts, and the synchronizing engagement device causes additional power losses and wear.

Method used

The system employs a multi-motor system, including a first motor that is always connected to the output and a second motor that is intermittently connected via a clutch. It uses a meshing clutch, such as a dog clutch, and a controller monitors the motor position and speed to synchronize the gears, avoiding synchronization engagement. The clutch suspension allows deflection when improperly engaged, reducing power loss.

Benefits of technology

This reduces power loss during gear shifts, improves vehicle efficiency and acceleration performance, extends clutch life, meets the high torque demands of heavy commercial vehicles, and reduces energy consumption.

✦ Generated by Eureka AI based on patent content.

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Abstract

An electric powertrain includes a first electric motor in uninterrupted connection with a drive shaft of a vehicle. The electric powertrain further includes a second electric motor in uninterrupted connection with the drive shaft. In one form, the uninterrupted connection includes a clutch. The electric powertrain further includes a first gear train in the form of a first planetary gear and a second gear train in the form of a second planetary gear. In one variation, the clutch includes a dog clutch in the form of a dog clutch. The dog clutch has a clutch suspension configured to deflect a clutch collar when the gear arrangement is misaligned during a shift.
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