For heavy-duty trucks, electric powertrain design must balance high wheel-end output torque with mechanical and electrical efficiency across the vehicle operating range.
This 13t electric truck axle integrates a traction motor and a 4-speed transmission directly onto a rigid drive axle. Designed for 4×2 and 6×4 heavy-duty trucks, the system delivers up to 39,069 N·m of maximum output torque at a maximum vehicle speed of 110 km/h. By replacing conventional central drive arrangements, the integrated e-axle reduces driveline weight by 439 kg.
1. Electric Truck Axle Architecture & Mechanical Design
The electric truck axle system employs a parallel-shaft layout where the Permanent Magnet Synchronous Motor (PMSM) is coaxially connected to the transmission. By using the transmission’s torque-multiplication and speed-regulation characteristics, a smaller motor achieves the torque output of a significantly larger direct-drive motor.
Key mechanical characteristics include:
- High Transmission Efficiency: Fewer transmission stages with no wheel-end reduction and no main reduction bevel gears, allowing efficient power transmission and 100% regenerative braking recovery.
- Planetary Shifting Structure: The shifting mechanism uses planetary gear sets, which lowers gear rotational speed during shifting and minimizes oil-churning losses.
- Reduced Cantilever & Vibration: The coaxial arrangement keeps the motor’s center of mass close to the axle, resulting in a short cantilever overhang and reduced dynamic vibration.
- Lubrication System: Combines a mechanical oil pump with splash lubrication to ensure reliable lubrication with low mechanical complexity.
- Modular Assembly: The motor, transmission, and shift mechanisms use modular assemblies for ease of maintenance and servicing.
- Lightweight Construction: Utilizes an aluminum alloy transmission casing, optimized gear-shaft design, and a lightweight cast axle housing.
2. 13T Electric Truck Axle Technical Specifications
| Parameter | Specification |
|---|---|
| Model | JEA130-190-S4-01 |
| Rated Axle Load | 13,000 kg (13 t) |
| Applicable Vehicle Platforms | 4×2, 6×4 Heavy-Duty Trucks |
| Maximum Output Torque | 39,069 N·m |
| Maximum Vehicle Speed | 110 km/h |
| Transmission Gearing (4-Speed) | 1st: 71.0, 2nd: 36.3, 3rd: 20.0, 4th: 10.2 |
| Motor Type / Quantity | Permanent Magnet Synchronous Motor (PMSM) / 1 |
| Rim Mounting Distance | 1,837 mm |
| Spring Center Distance | 1,018 mm – 1,050 mm (Adjustable) |
| Axle Housing | Standardized cast axle housing |
| Suspension Compatibility | Leaf spring or Air suspension |
| Brake Options | Drum brake (φ410 × 220 mm) / 22.5″ Disc brake |
| Auxiliary Interfaces | Power take-off (PTO), oil pump, and differential lock (Optional) |
| Wheel End Options | Low-friction hub units available |
| Weight Advantage | Electric axle mass is 439 kg lighter than a pure electric central-drive layout |
| Environmental Ingress Rating | IP67 |
Motor Configurations & Controller Matching
The axle supports either water-cooled or oil-cooled PMSM configurations depending on vehicle system requirements:
| Motor Configuration | Rated Power / Peak Power | Rated Torque / Peak Torque | Matched Controller Current |
|---|---|---|---|
| Water-Cooled PMSM | 150 kW / 252 kW | 285 N·m / 550 N·m | 600 A |
| Oil-Cooled PMSM | 200 kW / 300 kW | 300 N·m / 560 N·m | 900 A |
3. 13T Electric Truck Axle Test & Validation Summary
The 13t electric truck axle system has completed component-level Design Verification (DV) bench testing and full-vehicle validation programs.
Bench Testing (DV Testing Completed)
- Fatigue durability testing
- Housing structural fatigue testing
- High-speed and continuous speed tests
- Temperature rise testing
- Mechanical efficiency and no-load drag loss analysis
- Lubrication verification
- Full-assembly IP67 water immersion and environmental testing (dust, high/low temperature, vibration)
Full-Vehicle Testing Completed
- 12,000 km accelerated durability test on proving ground tracks
- 1,000 km rough-road / severe surface testing
- 5,000 shifting endurance cycles
- Real-vehicle loaded commercial freight trial operations
4. Production Status & Commercial Deployment
- Series Production (SOP): The 13t electric truck axle has completed all engineering and manufacturing validation phases and is in active series production.
- Volume HCV Applications: The axle is currently deployed in volume across multiple heavy commercial vehicle (HCV) platforms, including 4×2 and 6×4 haulage and regional freight trucks.
- Manufacturing Maturity: Built on standardized tooling and automated assembly processes to ensure dimensional consistency, gear meshing quality, and batch-to-batch reliability for OEM supply chains.
Discuss Your Electric Truck Axle Requirements
Jenwyn Tech supplies electric axle systems and commercial EV powertrain solutions for truck manufacturers, vehicle OEMs and system integrators.
- Discover our full product range: https://jenwyntech.com/products/
- Discover other electric powertrain solutions for heavy-duty trucks: https://jenwyntech.com/solutions/truck-electric-powertrain/
If you are developing a 4×2 or 6×4 electric truck platform and evaluating an electric axle solution, don’t hesitate to explore our electric axle systems or contact us to discuss your project. Email us at contact@jenwyntech.com or fill out the inquiry form below to discuss your project requirements.