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New distributed electric drive system and key technologies of its chassis
The integrated wheel-side drive assembly is efficient, low-cost, and lightly sprung, and is widely used in new energy vehicles.
Type
Electric drive assembly
Tags
Information & systems
Energy internet
Transportation engineering
Power and electrical engineering
Suspension swing arm
Wheel-side reducer
In-wheel motors
Distributed electric power
Solution maturity
Early adoption / Process verification
Cooperation methods
Joint venture cooperation
Technology shares
Face-to-face consultation
Applicable industry
Transportation, warehousing and postal services
Applications
New energy vehicles
Key innovations
The innovation of this distributed electric vehicle power system lies in the integrated design of wheel-side motors, reducers and suspension swing arms.
Potential economic benefits
Through low-cost manufacturing, simplified structure, reduced motor requirements and high-efficiency transmission, this product significantly reduces the total system cost and operating energy consumption, and improves the economic benefits of mass production.
Potential climate benefits
The transmission efficiency has increased by more than 5%, significantly reducing the energy consumption of electric vehicles and directly reducing carbon emissions from the power generation end. Lightweight unsprung mass and optimized structure further improve vehicle energy efficiency. Low-cost accelerates the popularization of electric vehicles and replaces fuel vehicles. Free lubrication and material conservation reduce the carbon footprint of production and maintenance.
Solution supplier
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Tongji University
Tongji University
Tongji University: The national "double first-class" construction university uses advantageous disciplines such as civil engineering, architecture, transportation, and environment to cultivate innovative talents to serve national construction and sustainable urban development.
Shanghai，China
Solution details

Introduction to the results:

The distributed electric vehicle power system drive assembly adopts an integrated design of a wheel-side motor, wheel-side reducer and suspension swing arm. It has a compact structure, high efficiency, light unsprung mass, high chassis space utilization, and low batch manufacturing cost. The characteristics of better solving the long-standing problems of the existing distributed in-wheel electric drive system of heavy unsprung mass and high system cost. It has obvious low cost and high performance characteristics, and has multiple invention patents. It can be widely used in various distributed drive new energy vehicles, such as low-floor buses, sedans, logistics vehicles, mini vehicles, high-performance SUVs and off-road vehicles.

1. Integrated single swing arm suspension-hub synchronous belt drive electric drive assembly

Timing belt efficiency 98-99. 5%, can improve the efficiency of the entire hub drive transmission system by more than 5%; no lubrication or sealing is required, and the noise is low

1. The high-performance dual-motor drive axle product based on the single swing arm-wheel side electric drive assembly uses a set of independently driven integrated single swing arm suspension and wheel hub reduction electric drive assemblies respectively. The front wheels can be adapted to different axle structures, making it easy to realize product platform, serialization and diversification of drive modes.

Technology and cost advantages:

1. The equivalent unsprung weight is light, efficient transmission, and high chassis space utilization;

2. The hub reduction transmission system has mature manufacturing technology and low cost (using ordinary fixed axis gear transmission or synchronous belt transmission, etc.);

3. The thin-walled shell of the hub reduction box replaces the traditional single tilt arm suspension control arm with good rigidity and strength (and eliminates the traditional tilt arm structure);

4. The low power density requirements of the hub drive motor are conducive to reducing the cost of the drive motor system.

Last updated
08:14:20, Nov 05, 2025
Information contributed by
Green Technology Bank

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