Heavy Truck Wheel Drive System
The battery is arranged at the rear of the cab and occupies the cargo space. The rear battery box layout requires 850mm, and the cargo box is 850mm shorter. For port tractors, it is quite rare to load 1 standard container or small size container. For an 8×4 van, the standard size of the cargo box is 9.6m×2.45m×2.6m, the loading volume is 5.5 m3/vehicle, and 9% less cargo is loaded. The vehicle has a high center of gravity and poor safety.
The battery is arranged on the chassis and does not occupy the volume of the cargo compartment, which can meet the demand for large power. The vehicle has a low center of gravity and high safety.
-
Mid drive solution
The traditional mid-drive rear axle adopts a spiral bevel gear structure, the forward and reverse gear surfaces have inconsistent torque transmission capabilities, and the reverse torque transmission capability is low, so the regenerative braking capability of the motor cannot be fully utilized. -
Distributed drive scheme
The distributed drive adopts parallel shaft cylindrical gear transmission, the positive and negative gears are exactly the same, can withstand 100% reverse torque, and can make full use of the regenerative braking capacity of the motor.
At present, the heavy truck is only equipped with ABS anti-lock braking system, and there is no configuration for ASR driving wheel slippage, ESC body stability system, and electronic differential lock. Through the strategic control of the electronic differential system of the wheel motor, it has ASR/ESC safety configuration, which improves the passability, handling stability and safety of the whole vehicle.
Parallel shaft cylindrical gear transmission, gears are more reliable, working condition method
There i s no abnormality in the 1250 - hour transmission test;
High reliability bearing, 2.5 times the load impact 1 million times bearing fatigue without failure;
Compared with the central drive scheme, the ground clearance increases by 7.3%; compared with the motor gearbox integrated axle scheme, it increases by 11.7%.
Safety
Electric ASR (drive anti-skid) function, safer on wet road, can realize electronic differential lock function, better passability on soft road;
Equipped with Body Stability Control (ESC) to improve vehicle cor ner i ng s afety and passability;
The frontandrearaxlesar driven independently, the left and right wheels of the single axle are driven independently, and do not affect each other. When one of them fails, the other can drive normally.
The system weight is 13.2% lower than that of the central drive, and 13.6% lower than that of the motor gearbox integrated axle;
Compared with the existing electric vehicles, the cargo carrying capacity is increased by more than 10%, which is equivalent to the traditional models;
Economy
Equipped with IRBS intelligent regenerative braking system, the motor can recover 100% torque, and the energy consumption is reduced by 10-15% compared with the direct drive system
Electric ASR function can reduce tire wear and reduce energy consumption by about 2% per 100 kilometers;
Dynamic
Strong power, 3% higher than traditional axles, 10% higher than gearbox integrated axles
|
Item |
parameter |
|
Axle load (kg) |
13000 |
|
Maximum output torque (N.m) |
2×25000 |
|
Maximum output power (kW) |
2×180 |
|
Maximum continuous wheel speed (rpm) |
≥430 |
|
Maximum wheel speed (rpm) |
610 |
|
1st gear ratio |
49.459 |
|
2 gear ratio |
15.33 |
|
Tire Size (Standard) |
12R22.5 |
|
Rim size (standard) |
22.5 |
|
brake |
Air Disc/Drum Brake |
|
Wheel installation distance (mm) |
1822 |
|
Axle weight (kg) |
＜1100 |
|
Protection class |
IP67 |
|
Coolant |
50% ethylene glycol + 50% water |
|
Motor type |
2×PMSM |
|
Rated Voltage(VDC) |
400-750 |
|
Maximum speed (km/h) |
120 |
|
Grade |
20% |
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