Electric Powertrain with Integrated Three-speed Automatic Transmission
Overview
This electric powertrain accompanied with an integrated three-speed transmission is developed to optimise the overall efficiency of electric vehicle (EV) powertrain system and improve the total driving mileage after every recharge. Also, the overall performance of EV is significantly improved via the contribution of multiple gears. The mated transmission facilitates the manoeuvre of an EV in different terrains like the hilly Hong Kong traffic.
Commercialisation opportunities
Licensing agreement
Problem addressed
The overall efficiency of the traditional electric powertrain drops more during 'low speed high load' or 'high speed low load' conditions.
Innovation
- The matching traction motor, multi-speed transmission and gearshifting control algorithm improve overall powertrain efficiency and performance.
Key impact
- Higher efficiency and longer driving mileage.
- Higher cruising speed and hill climbing ability without increasing the power of its traction motor.
Application
- Electric minibus
- Electric truck
Centre of Advanced Power and Autonomous Systems (APAS)
Centre of Advanced Power and Autonomous Systems (APAS) (formerly Automotive Platforms and Application Systems R&D Centre) was established in 2006 and is fully integrated as a business division under HKPC on 1 April 2025. APAS continues to undertake market-led R&D programmes spanning green transportation, smart mobility, intelligent systems and emerging applications, as well as commercialises R&D results in collaboration with industry, universities and technology institutes to enhance the competitiveness of Hong Kong's automotive and other transportation sectors in new energy and smart driving.
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